Category Archives: Science

Squeezing a rock-star material could make it stable enough for solar cells

Scientists at SLAC National Accelerator Laboratory and Stanford University discovered that squeezing a promising lead halide material in a diamond anvil cell (left) produces a so-called “black perovskite” (right) that’s stable enough for solar power applications. Credit: Greg Stewart/ SLAC National Accelerator Laboratory

Among the materials known as perovskites, one of the most exciting is a material that can convert sunlight to electricity as efficiently as today’s commercial silicon solar cells and has the potential for being much cheaper and easier to manufacture.

There’s just one problem: Of the four possible atomic configurations, or phases, this material can take, three are efficient but unstable at room temperature and in ordinary environments, and they quickly revert to the fourth phase, which is completely useless for solar applications.

Now scientists at Stanford University and the Department of Energy’s SLAC National Accelerator Laboratory have found a novel solution: Simply place the useless version of the material in a diamond anvil cell and squeeze it at high temperature. This treatment nudges its atomic structure into an efficient configuration and keeps it that way, even at room temperature and in relatively moist air.

The researchers described their results in Nature Communications.

“This is the first study to use pressure to control this stability, and it really opens up a lot of possibilities,” said Yu Lin, a SLAC staff scientist and investigator with the Stanford Institute for Materials and Energy Sciences (SIMES).

“Now that we’ve found this optimal way to prepare the material,” she said, “there’s potential for scaling it up for industrial production, and for using this same approach to manipulate other perovskite phases.”

A search for stability

Perovskites get their name from a natural mineral with the same atomic structure. In this case the scientists studied a lead halide perovskite that’s a combination of iodine, lead and cesium.

One phase of this material, known as the yellow phase, does not have a true perovskite structure and can’t be used in solar cells. However, scientists discovered a while back that if you process it in certain ways, it changes to a black perovskite phase that’s extremely efficient at converting sunlight to electricity. “This has made it highly sought after and the focus of a lot of research,” said Stanford Professor and study co-author Wendy Mao.

Unfortunately, these black phases are also structurally unstable and tend to quickly slump back into the useless configuration. Plus, they only operate with high efficiency at high temperatures, Mao said, and researchers will have to overcome both of those problems before they can be used in practical devices.

There had been previous attempts to stabilize the black phases with chemistry, strain or temperature, but only in a moisture-free environment that doesn’t reflect the real-world conditions that solar cells operate in. This study combined both pressure and temperature in a more realistic working environment.

Pressure and heat do the trick

Working with colleagues in the Stanford research groups of Mao and Professor Hemamala Karunadasa, Lin and postdoctoral researcher Feng Ke designed a setup where yellow phase crystals were squeezed between the tips of diamonds in what’s known as a diamond anvil cell. With the pressure still on, the crystals were heated to 450 degrees Celsius and then cooled down.

Under the right combination of pressure and temperature, the crystals turned from yellow to black and stayed in the black phase after the pressure was released, the scientists said. They were resistant to deterioration from moist air and remained stable and efficient at room temperature for 10 to 30 days or more.

Examination with X-rays and other techniques confirmed the shift in the material’s crystal structure, and calculations by SIMES theorists Chunjing Jia and Thomas Devereaux provided insight into how the pressure changed the structure and preserved the black phase.

The pressure needed to turn the crystals black and keep them that way was roughly 1,000 to 6,000 times atmospheric pressure, Lin said—about a tenth of the pressures routinely used in the synthetic diamond industry. So one of the goals for further research will be to transfer what the researchers have learned from their diamond anvil cell experiments to industry and scale up the process to bring it within the realm of manufacturing.


First glimpse of polarons forming in a promising next-gen energy material


More information:
Feng Ke et al, Preserving a robust CsPbI3 perovskite phase via pressure-directed octahedral tilt, Nature Communications (2021). DOI: 10.1038/s41467-020-20745-5
Provided by
SLAC National Accelerator Laboratory

Citation:
Squeezing a rock-star material could make it stable enough for solar cells (2021, January 21)
retrieved 22 January 2021
from https://phys.org/news/2021-01-rock-star-material-stable-solar-cells.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



Read original article here

6 Things to Know About NASA’s Mars Helicopter on Its Way to Mars

2. Mars won’t make it easy for Ingenuity to attempt the first powered, controlled flight on another planet.

Because the Mars atmosphere is so thin, Ingenuity is designed to be light, with rotor blades that are much larger and spin much faster than what would be required for a helicopter of Ingenuity’s mass on Earth.

The Red Planet also has beyond bone-chilling temperatures, with nights as cold as minus 130 degrees Fahrenheit (minus 90 degrees Celsius) at Jezero Crater, the rover and helicopter’s landing site. These temperatures will push the original design limits of the off-the-shelf parts used in Ingenuity. Tests on Earth at the predicted temperatures indicate Ingenuity’s parts should work as designed, but the team is looking forward to the real test on Mars.

“Mars isn’t exactly pulling out the welcome mat,” said Tim Canham, Ingenuity’s operations lead at JPL. “One of the first things Ingenuity has to do when it gets to Mars is just survive its first night.”

3. Ingenuity relies on the Mars 2020 Perseverance mission for safe passage to Mars and for operations on the Red Planet’s surface.

Ingenuity is nestled sideways under the belly of the Perseverance rover with a cover to protect it from debris kicked up during landing. Both the rover and the helicopter are safely ensconced inside a clamshell-like spacecraft entry capsule during the 293-million-mile (471-million-kilometer) journey to Mars. The power system on the Mars 2020 spacecraft periodically charges Ingenuity’s batteries on the way there.

To reach the Martian surface, Ingenuity rides along with Perseverance as it lands. The rover’s entry, descent, and landing system features a supersonic parachute, new “brains” for avoiding hazards autonomously, and components for the sky crane maneuver, which lowers the rover onto Mars from a descent vehicle. Only about 50% of the attempts to land on Mars, by any space agency, have been successful.

Once a suitable site to deploy the helicopter is found, the rover’s Mars Helicopter Delivery System will shed the landing cover, rotate the helicopter to a legs-down configuration, and gently drop Ingenuity on the surface in the first few months after landing. Throughout the helicopter’s commissioning and flight test campaign, the rover will assist with the communications back-and-forth from Earth. The rover team also plans to collect images of Ingenuity.

4. Ingenuity is smart for a small robot.

Delays are an inherent part of communicating with spacecraft across interplanetary distances, which means Ingenuity’s flight controllers at JPL won’t be able to control the helicopter with a joystick. In fact, they won’t be able to look at engineering data or images from each flight until well after the flight takes place.

So Ingenuity will make some of its own decisions based on parameters set by its engineers on Earth. The helicopter has a kind of programmable thermostat, for instance, that will keep it warm on Mars. During flight, Ingenuity will analyze sensor data and images of the terrain to ensure it stays on the flight path designed by project engineers.

5. The Ingenuity team counts success one step at a time.

Given Ingenuity’s experimental nature, the team has a long list of milestones the helicopter must reach before it can take off and land in the spring of 2021. The team will celebrate each milestone:

  • Surviving the cruise to Mars and landing on the Red Planet
  • Safely deploying to the surface from Perseverance’s belly
  • Autonomously keeping warm through the intensely cold Martian nights
  • Autonomously charging itself with the solar panel atop its rotors
  • Successfully communicating to and from the helicopter via a subsystem known as the Mars Helicopter Base Station on the rover

If the first experimental flight test on another planet succeeds, the Ingenuity team will attempt more test flights.

Read original article here

Newly discovered giant galaxies dwarf the Milky Way

These images show two giant radio galaxies found with using the MeerKAT telescope. The red in both images shows the radio light being emitted by the galaxies against a background of the sky as it is seen in visible light.

This artist’s conception of quasar J0313-1806 depicts it as it was 670 million years after the Big Bang. Quasars are highly energetic objects at the centers of galaxies, powered by black holes and brighter than entire galaxies.

Shown here is a phenomenon known as zodiacal light, which is caused by sunlight reflecting off tiny dust particles in the inner solar system.

This artist’s impression of the distant galaxy ID2299 shows some of its gas being ejected by a “tidal tail” as a result of a merger between two galaxies.

This diagram shows the two most important companion galaxies to the Milky Way: the Large Magellanic Cloud (left) and the Small Magellanic Cloud. It was made using data from the European Space Agency Gaia satellite.

The Blue Ring Nebula is thought to be a never-before-seen phase that occurs after the merger of two stars. Debris flowing out from the merger was sliced by a disk around one of the stars, creating two cones of material glowing in ultraviolet light.

The red supergiant star Betelgeuse, in the constellation of Orion, experienced unprecedented dimming late in 2019. This image was taken in January using the European Southern Observatory’s Very Large Telescope.

This is an infrared image of Apep, a Wolf-Rayet star binary system located 8,000 light-years from Earth.

An artist’s illustration, left, helps visualize the details of an unusual star system, GW Orionis, in the Orion constellation. The system’s circumstellar disk is broken, resulting in misaligned rings around its three stars.

This is a simulation of two spiral black holes that merge and emit gravitational waves.

This artist’s illustration shows the unexpected dimming of the star Betelgeuse.

This extremely distant galaxy, which looks similar to our own Milky Way, appears like a ring of light.

This artist’s interpretation shows the calcium-rich supernova 2019ehk. The orange represents the calcium-rich material created in the explosion. Purple reveals gas shed by the star right before the explosion.

The blue dot at the center of this image marks the approximate location of a supernova event which occurred 140 million light-years from Earth, where a white dwarf exploded and created an ultraviolet flash. It was located close to tail of the Draco constellation.

This radar image captured by NASA’s Magellan mission to Venus in 1991 shows a corona, a large circular structure 120 miles in diameter, named Aine Corona.

When a star’s mass is ejected during a supernova, it expands quickly. Eventually, it will slow and form a hot bubble of glowing gas. A white dwarf will emerge from this gas bubble and move across the galaxy.

The afterglow of short gamma ray burst that was detected 10 billion light-years away is shown here in a circle. This image was taken by the Gemini-North telescope.

This Hubble Space Telescope image shows NGC 7513, a barred spiral galaxy 60 million light-years away. Due to the expansion of the universe, the galaxy appears to be moving away from the Milky Way at an accelerate rate.

This artist’s concept illustration shows what the luminous blue variable star in the Kinman Dwarf galaxy may have looked like before it mysteriously disappeared.

This is an artist’s illustration of a supermassive black hole and its surrounding disk of gas. Inside this disk are two smaller black holes orbiting one another. Researchers identified a flare of light suspected to have come from one such binary pair soon after they merged into a larger black hole.

This image, taken from a video, shows what happens as two objects of different masses merge together and create gravitational waves.

This is an artist’s impression showing the detection of a repeating fast radio burst seen in blue, which is in orbit with an astrophysical object seen in pink.

Fast radio bursts, which make a splash by leaving their host galaxy in a bright burst of radio waves, helped detect “missing matter” in the universe.

A new type of explosion was found in a tiny galaxy 500 million light-years away from Earth. This type of explosion is referred to as a fast blue optical transient.

Astronomers have discovered a rare type of galaxy described as a “cosmic ring of fire.” This artist’s illustration shows the galaxy as it existed 11 billion years ago.

This is an artist’s impression of the Wolfe Disk, a massive rotating disk galaxy in the early universe.

A bright yellow “twist” near the center of this image shows where a planet may be forming around the AB Aurigae star. The image was captured by the European Southern Observatory’s Very Large Telescope.

This artist’s illustration shows the orbits of two stars and an invisible black hole 1,000 light-years from Earth. This system includes one star (small orbit seen in blue) orbiting a newly discovered black hole (orbit in red), as well as a third star in a wider orbit (also in blue).

This illustration shows a star’s core, known as a white dwarf, pulled into orbit around a black hole. During each orbit, the black hole rips off more material from the star and pulls it into a glowing disk of material around the black hole. Before its encounter with the black hole, the star was a red giant in the last stages of stellar evolution.

This artist’s illustration shows the collision of two 125-mile-wide icy, dusty bodies orbiting the bright star Fomalhaut, located 25 light-years away. The observation of the aftermath of this collision was once thought to be an exoplanet.

This is an artist’s impression of the interstellar comet 2I/Borisov as it travels through our solar system. New observations detected carbon monixide in the cometary tail as the sun heated the comet.

This rosette pattern is the orbit of a star, called S2, around the supermassive black hole at the center of our Milky Way galaxy.

This is an artist’s illustration of SN2016aps, which astronomers believe is the brightest supernova ever observed.

This is an artist’s illustration of a brown dwarf, or a “failed star” object, and its magnetic field. The brown dwarf’s atmosphere and magnetic field rotate at different speeds, which allowed astronomers to determine wind speed on the object.

This artist’s illustration shows an intermediate-mass black hole tearing into a star.

This is an artist’s impression of a large star known as HD74423 and its much smaller red dwarf companion in a binary star system. The large star appears to pulsate on one side only, and it’s being distorted by the gravitational pull of its companion star into a teardrop shape.

This is an artist’s impression of two white dwarfs in the process of merging. While astronomers expected that this might cause a supernova, they have found an instance of two white dwarf stars that survived merging.

A combination of space and ground-based telescopes have found evidence for the biggest explosion seen in the universe. The explosion was created by a black hole located in the Ophiuchus cluster’s central galaxy, which has blasted out jets and carved a large cavity in the surrounding hot gas.

This new ALMA image shows the outcome of a stellar fight: a complex and stunning gas environment surrounding the binary star system HD101584.

NASA’s Spitzer Space Telescope captured the Tarantula Nebula in two wavelengths of infrared light. The red represents hot gas, while the blue regions are interstellar dust.

A white dwarf, left, is pulling material off of a brown dwarf, right, about 3,000 light-years from Earth.

This image shows the orbits of the six G objects at the center of our galaxy, with the supermassive black hole indicated with a white cross. Stars, gas and dust are in the background.

After stars die, they expel their particles out into space, which form new stars in turn. In one case, stardust became embedded in a meteorite that fell to Earth. This illustration shows that stardust could flow from sources like the Egg Nebula to create the grains recovered from the meteorite, which landed in Australia.

The former North Star, Alpha Draconis or Thuban, is circled here in an image of the northern sky.

Galaxy UGC 2885, nicknamed the “Godzilla galaxy,” may be the largest one in the local universe.

The host galaxy of a newly traced repeating fast radio burst acquired with the 8-meter Gemini-North telescope.

The Milky Way’s central region was imaged using the European Southern Observatory’s Very Large Telescope.

This is an artist’s illustration of what MAMBO-9 would look like in visible light. The galaxy is very dusty and it has yet to build most of its stars. The two components show that the galaxy is in the process of merging.

Astronomers have found a white dwarf star surrounded by a gas disk created from an ice giant planet being torn apart by its gravity.

New measurements of the black hole at the center of the Holm 15A galaxy reveal it’s 40 billion times more massive than our sun, making it the heaviest known black hole to be directly measured.

A close-up view of an interstellar comet passing through our solar system can be seen on the left. On the right, astronomers used an image of Earth for comparison.

The galaxy NGC 6240 hosts three supermassive black holes at its core.

Gamma-ray bursts are shown in this artist’s illustration. They can be triggered by the collision or neutron stars or the explosion of a super massive star, collapsing into a black hole.

Two gaseous clouds resembling peacocks have been found in neighboring dwarf galaxy the Large Magellanic Cloud. In these images by the ALMA telescopes, red and green highlight molecular gas while blue shows ionized hydrogen gas.

An artist’s impression of the Milky Way’s big black hole flinging a star from the galaxy’s center.

The Jack-o’-lantern Nebula is on the edge of the Milky Way. Radiation from the massive star at its center created spooky-looking gaps in the nebula that make it look like a carved pumpkin.

This new image from the NASA/ESA Hubble Space Telescope captures two galaxies of equal size in a collision that appears to resemble a ghostly face. This observation was made on 19 June 2019 in visible light by the telescope’s Advanced Camera for Surveys.

A new SPHERE/VLT image of Hygiea, which could be the Solar System’s smallest dwarf planet yet. As an object in the main asteroid belt, Hygiea satisfies right away three of the four requirements to be classified as a dwarf planet: it orbits around the Sun, it is not a moon and, unlike a planet, it has not cleared the neighbourhood around its orbit. The final requirement is that it have enough mass that its own gravity pulls it into a roughly spherical shape. This is what VLT observations have now revealed about Hygiea.

This is an artist’s rendering of what a massive galaxy from the early universe might look like. The rendering shows that star formation in the galaxy is lighting up the surrounding gas. Image by James Josephides/Swinburne Astronomy Productions, Christina Williams/University of Arizona and Ivo Labbe/Swinburne.

This is an artist’s illustration of gas and dust disk around the star HD 163296. Gaps in the disk are likely the location of baby planets that are forming.

This is a two-color composite image of comet 2I/Borisov captured by the Gemini North telescope on September 10.

This illustration shows a young, forming planet in a “baby-proof” star system.

Using a simulation, astronomers shed light on the faint gaseous filaments that comprise the cosmic web in a massive galaxy cluster.

The Hubble Space Telescope’s Wide Field Camera observed Saturn in June as the planet made its closest approach to Earth this year, at approximately 1.36 billion kilometers away.

An artist’s impression of the massive bursts of ionizing radiation exploding from the center of the Milky Way and impacting the Magellanic Stream.

The Atacama Large Millimeter/submillimeter Array captured this unprecedented image of two circumstellar disks, in which baby stars are growing, feeding off material from their surrounding birth disk.

This is an artist’s illustration of what a Neptune-size moon would look like orbiting the gas giant exoplanet Kepler-1625b in a star system 8,000 light-years from Earth. It could be the first exomoon ever discovered.

This infrared image from NASA’s Spitzer Space Telescope shows a cloud of gas and dust full of bubbles, which are inflated by wind and radiation from massive young stars. Each bubble is filled with hundreds to thousands of stars, which form from dense clouds of gas and dust.

This is an artist’s impression of the path of the fast radio burst FRB 181112 traveling from a distant host galaxy to reach the Earth. It passed through the halo of a galaxy on the way.

After passing too close to a supermassive black hole, the star in this artist’s conception is torn into a thin stream of gas, which is then pulled back around the black hole and slams into itself, creating a bright shock and ejecting more hot material.

Comparison of GJ 3512 to the Solar System and other nearby red-dwarf planetary systems. Planets around a solar-mass stars can grow until they start accreting gas and become giant planets such as Jupiter, in a few millions of years. But we thought that small stars such asProxima, TRAPPIST-1, TeegardernÕs star and GJ 3512, could not form Jupiter mass planets.

A collision of three galaxies has set three supermassive black holes on a crash course with each other in a system one billion light-years from Earth.

2I/Borisov is the first interstellar comet observed in our solar system and only the second observed interstellar visitor to our solar system.

KIC 8462852, also known as Boyajian’s Star or Tabby’s Star, is 1,000 light-years from us. It’s 50% bigger than our sun and 1,000 degrees hotter. And it doesn’t behave like any other star, dimming and brightening sporadically. Dust around the star, depicted here in an artist’s illustration, may be the most likely cause of its strange behavior.

This is an artist’s impression of a massive neutron star’s pulse being delayed by the passage of a white dwarf star between the neutron star and Earth. Astronomers have detected the most massive neutron star to date due to this delay.

The European Southern Observatory’s VISTA telescope captured a stunning image of the Large Magellanic Cloud, one of our nearest galactic neighbors. The near-infrared capability of the telescope showcases millions of individual stars.

Astronomers believe Comet C/2019 Q4 could be the second known interstellar visitor to our solar system. It was first spotted on August 30 and imaged by the Canada-France-Hawaii Telescope on Hawaii’s Big Island on September 10, 2019.

A star known as S0-2, represented as the blue and green object in this artist’s illustration, made its closest approach to the supermassive black hole at the center of the Milky Way in 2018. This provided a test for Einstein’s theory of general relativity.

This is a radio image of the Milky Way’s galactic center. The radio bubbles discovered by MeerKAT extend vertically above and below the plane of the galaxy.

A kilanova was captured by the Hubble Space Telescope in 2016, seen here next to the red arrow. Kilanovae are massive explosions that create heavy elements like gold and platinum.

This is an artist’s depiction of a black hole about to swallow a neutron star. Detectors signaled this possible event on August 14.

This artist’s illustration shows LHS 3844b, a rocky nearby exoplanet. It’s 1.3 times the mass of Earth and orbits a cool M-dwarf star. The planet’s surface is probably dark and covered in cooled volcanic material, and there is no detectable atmosphere.

An artist’s concept of the explosion of a massive star within a dense stellar environment.

Galaxy NGC 5866 is 44 million light-years from Earth. It appears flat because we can only see its edge in this image captured by NASA’s Spitzer Space Telescope.

The Hubble Space Telescope took a dazzling new portrait of Jupiter, showcasing its vivid colors and swirling cloud features in the atmosphere.

This is an artist’s impression of the ancient massive and distant galaxies observed with ALMA.

Glowing gas clouds and newborn stars make up the Seagull Nebula in one of the Milky Way galaxy’s spiral arms.

An artist’s concept of what the first stars looked like soon after the Big Bang.

Spiral galaxy NGC 2985 lies roughly over 70 million light years from our solar system in the constellation of Ursa Major.

Early in the history of the universe, the Milky Way galaxy collided with a dwarf galaxy, left, which helped form our galaxy’s ring and structure as it’s known today.

An artist’s illustration of a thin disc embedded in a supermassive black hole at the center of spiral galaxy NGC 3147, 130 million light-years away.

Hubble captured this view of a spiral galaxy named NGC 972 that appears to be blooming with new star formation. The orange glow is created as hydrogen gas reacts to the intense light streaming outwards from nearby newborn stars.

This is jellyfish galaxy JO201.

The Eta Carinae star system, located 7,500 light-years from Earth, experienced a great explosion in 1838 and the Hubble Space Telescope is still capturing the aftermath. This new ultraviolet image reveals the warm glowing gas clouds that resemble fireworks.

‘Oumuamua, the first observed interstellar visitor to our solar system, is shown in an artist’s illustration.

This is an artist’s rendering of ancient supernovae that bombarded Earth with cosmic energy millions of years ago.

An artist’s impression of CSIRO’s Australian SKA Pathfinder radio telescope finding a fast radio burst and determining its precise location.

The Whirlpool galaxy has been captured in different light wavelengths. On the left is a visible light image. The next image combines visible and infrared light, while the two on the right show different wavelengths of infrared light.

Electrically charged C60 molecules, in which 60 carbon atoms are arranged in a hollow sphere that resembles a soccer ball, was found by the Hubble Space Telescope in the interstellar medium between star systems.

These are magnified galaxies behind large galaxy clusters. The pink halos reveal the gas surrounding the distant galaxies and its structure. The gravitational lensing effect of the clusters multiplies the images of the galaxies.

This artist’s illustration shows a blue quasar at the center of a galaxy.

The NICER detector on the International Space Station recorded 22 months of nighttime X-ray data to create this map of the entire sky.

NASA’s Spitzer Space Telescope captured this mosaic of the star-forming Cepheus C and Cepheus B regions.

Galaxy NGC 4485 collided with its larger galactic neighbor NGC 4490 millions of years ago, leading to the creation of new stars seen in the right side of the image.

Astronomers developed a mosaic of the distant universe, called the Hubble Legacy Field, that documents 16 years of observations from the Hubble Space Telescope. The image contains 200,000 galaxies that stretch back through 13.3 billion years of time to just 500 million years after the Big Bang.

A ground-based telescope’s view of the Large Magellanic Cloud, a neighboring galaxy of our Milky Way. The inset was taken by the Hubble Space Telescope and shows one of the star clusters in the galaxy.

One of the brightest planetary nebulae on the sky and first discovered in 1878, nebula NGC 7027 can be seen toward the constellation of the Swan.

The asteroid 6478 Gault is seen with the NASA/ESA Hubble Space Telescope, showing two narrow, comet-like tails of debris that tell us that the asteroid is slowly undergoing self-destruction. The bright streaks surrounding the asteroid are background stars. The Gault asteroid is located 214 million miles from the Sun, between the orbits of Mars and Jupiter.

The ghostly shell in this image is a supernova, and the glowing trail leading away from it is a pulsar.

Hidden in one of the darkest corners of the Orion constellation, this Cosmic Bat is spreading its hazy wings through interstellar space two thousand light-years away. It is illuminated by the young stars nestled in its core — despite being shrouded by opaque clouds of dust, their bright rays still illuminate the nebula.

In this illustration, several dust rings circle the sun. These rings form when planets’ gravities tug dust grains into orbit around the sun. Recently, scientists have detected a dust ring at Mercury’s orbit. Others hypothesize the source of Venus’ dust ring is a group of never-before-detected co-orbital asteroids.

This is an artist’s impression of globular star clusters surrounding the Milky Way.

An artist’s impression of life on a planet in orbit around a binary star system, visible as two suns in the sky.

An artist’s illustration of one of the most distant solar system objects yet observed, 2018 VG18 — also known as “Farout.” The pink hue suggests the presence of ice. We don’t yet have an idea of what “FarFarOut” looks like.

This is an artist’s concept of the tiny moon Hippocamp that was discovered by the Hubble Space Telescope. Only 20 miles across, it may actually be a broken-off fragment from a much larger neighboring moon, Proteus, seen as a crescent in the background.

In this illustration, an asteroid (bottom left) breaks apart under the powerful gravity of LSPM J0207+3331, the oldest, coldest white dwarf known to be surrounded by a ring of dusty debris. Scientists think the system’s infrared signal is best explained by two distinct rings composed of dust supplied by crumbling asteroids.

An artist’s impression of the warped and twisted Milky Way disk. This happens when the rotational forces of the massive center of the galaxy tug on the outer disk.

This 1.3-kilometer (0.8-mile)-radius Kuiper Belt Object discovered by researchers on the edge of the solar system is believed to be the step between balls of dust and ice and fully formed planets.

A selfie taken by NASA’s Curiosity Mars rover on Vera Rubin Ridge before it moves to a new location.

The Hubble Space Telescope found a dwarf galaxy hiding behind a big star cluster that’s in our cosmic neighborhood. It’s so old and pristine that researchers have dubbed it a “living fossil” from the early universe.

How did massive black holes form in the early universe? The rotating gaseous disk of this dark matter halo breaks apart into three clumps that collapse under their own gravity to form supermassive stars. Those stars will quickly collapse and form massive black holes.

NASA’s Spitzer Space Telescope captured this image of the Large Magellanic Cloud, a satellite galaxy to our own Milky Way galaxy. Astrophysicists now believe it could collide with our galaxy in two billion years.

A mysterious bright object in the sky, dubbed “The Cow,” was captured in real time by telescopes around the world. Astronomers believe that it could be the birth of a black hole or neutron star, or a new class of object.

An illustration depicts the detection of a repeating fast radio burst from a mysterious source 3 billion light-years from Earth.

Comet 46P/Wirtanen will pass within 7 million miles of Earth on December 16. It’s ghostly green coma is the size of Jupiter, even though the comet itself is about three-quarters of a mile in diameter.

This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on December 2 by the OSIRIS-REx spacecraft from a range of 15 miles.

This image of a globular cluster of stars by the Hubble Space Telescope is one of the most ancient collections of stars known. The cluster, called NGC 6752, is more than 10 billion years old.

An image of Apep captured with the VISIR camera on the European Southern Observatory’s Very Large Telescope. This “pinwheel” star system is most likely doomed to end in a long-duration gamma-ray burst.

An artist’s impression of galaxy Abell 2597, showing the supermassive black hole expelling cold molecular gas like the pump of a giant intergalactic fountain.

An image of the Wild Duck Cluster, where every star is roughly 250 million years old.

These images reveal the final stage of a union between pairs of galactic nuclei in the messy cores of colliding galaxies.

A radio image of hydrogen gas in the Small Magellanic Cloud. Astronomers believe that the dwarf galaxy is slowly dying and will eventually be consumed by the Milky Way.

Further evidence of a supermassive black hole at the center of the Milky Way galaxy has been found. This visualization uses data from simulations of orbital motions of gas swirling around about 30% of the speed of light on a circular orbit around the black hole.

Does this look like a bat to you? This giant shadow comes from a bright star reflecting against the dusty disk surrounding it.

Hey, Bennu! NASA’s OSIRIS-REx mission, on its way to meet the primitive asteroid Bennu, is sending back images as it gets closer to its December 3 target.

These three panels reveal a supernova before, during and after it happened 920 million light-years from Earth(from left to right). The supernova, dubbed iPTF14gqr, is unusual because although the star was massive, its explosion was quick and faint. Researchers believe this is due to a companion star that siphoned away its mass.

An artist’s illustration of Planet X, which could be shaping the orbits of smaller extremely distant outer solar system objects like 2015 TG387.

This is an artist’s concept of what SIMP J01365663+0933473 might look like. It has 12.7 times the mass of Jupiter but a magnetic field 200 times more powerful than Jupiter’s. This object is 20 light-years from Earth. It’s on the boundary line between being a planet or being a brown dwarf.

The Andromeda galaxy cannibalized and shredded the once-large galaxy M32p, leaving behind this compact galaxy remnant known as M32. It is completely unique and contains a wealth of young stars.

Twelve new moons have been found around Jupiter. This graphic shows various groupings of the moons and their orbits, with the newly discovered ones shown in bold.

Scientists and observatories around the world were able to trace a high-energy neutrino to a galaxy with a supermassive, rapidly spinning black hole at its center, known as a blazar. The galaxy sits to the left of Orion’s shoulder in his constellation and is about 4 billion light-years from Earth.

Planets don’t just appear out of thin air — but they do require gas, dust and other processes not fully understood by astronomers. This is an artist’s impression of what “infant” planets look like forming around a young star.

These negative images of 2015 BZ509, which is circled in yellow, show the first known interstellar object that has become a permanent part of our solar system. The exo-asteroid was likely pulled into our solar system from another star system 4.5 billion years ago. It then settled into a retrograde orbit around Jupiter.

A close look at the diamond matrix in a meteorite that landed in Sudan in 2008. This is considered to be the first evidence of a proto-planet that helped form the terrestrial planets in our solar system.

2004 EW95 is the first carbon-rich asteroid confirmed to exist in the Kuiper Belt and a relic of the primordial solar system. This curious object probably formed in the asteroid belt between Mars and Jupiter before being flung billions of miles to its current home in the Kuiper Belt.

The NASA/ESA Hubble Space Telescope is celebrating its 28th anniversary in space with this stunning and colorful image of the Lagoon Nebula 4,000 light-years from Earth. While the whole nebula is 55 light-years across, this image only reveals a portion of about four light-years.

This is a more star-filled view of the Lagoon Nebula, using Hubble’s infrared capabilities. The reason you can see more stars is because infrared is able to cut through the dust and gas clouds to reveal the abundance of both young stars within the nebula, as well as more distant stars in the background.

The Rosette Nebula is 5,000 light-years from Earth. The distinctive nebula, which some claim looks more like a skull, has a hole in the middle that creates the illusion of its rose-like shape.

This inner slope of a Martian crater has several of the seasonal dark streaks called “recurrent slope lineae,” or RSL, that a November 2017 report interprets as granular flows, rather than darkening due to flowing water. The image is from the HiRISE camera on NASA’s Mars Reconnaissance Orbiter.

This artist’s impression shows a supernova explosion, which contains the luminosity of 100 million suns. Supernova iPTF14hls, which has exploded multiple times, may be the most massive and longest-lasting ever observed.

This illustration shows hydrocarbon compounds splitting into carbon and hydrogen inside ice giants, such as Neptune, turning into a “diamond (rain) shower.”

This striking image is the stellar nursery in the Orion Nebula, where stars are born. The red filament is a stretch of ammonia molecules measuring 50 light-years long. The blue represents the gas of the Orion Nebula. This image is a composite of observation from the Robert C. Byrd Green Bank Telescope and NASA’s Wide-field Infrared Survey Explore telescope. “We still don’t understand in detail how large clouds of gas in our Galaxy collapse to form new stars,” said Rachel Friesen, one of the collaboration’s co-Principal Investigators. “But ammonia is an excellent tracer of dense, star-forming gas.”

This is what Earth and its moon look like from Mars. The image is a composite of the best Earth image and the best moon image taken on November 20, 2016, by NASA’s Mars Reconnaissance Orbiter. The orbiter’s camera takes images in three wavelength bands: infrared, red and blue-green. Mars was about 127 million miles from Earth when the images were taken.

PGC 1000714 was initially thought to be a common elliptical galaxy, but a closer analysis revealed the incredibly rare discovery of a Hoag-type galaxy. It has a round core encircled by two detached rings.

NASA’s Cassini spacecraft took these images of the planet’s mysterious hexagon-shaped jetstream in December 2016. The hexagon was discovered in images taken by the Voyager spacecraft in the early 1980s. It’s estimated to have a diameter wider than two Earths.

A dead star gives off a greenish glow in this Hubble Space Telescope image of the Crab Nebula, located about 6,500 light years from Earth in the constellation Taurus. NASA released the image for Halloween 2016 and played up the theme in its press release. The agency said the “ghoulish-looking object still has a pulse.” At the center of the Crab Nebula is the crushed core, or “heart” of an exploded star. The heart is spinning 30 times per second and producing a magnetic field that generates 1 trillion volts, NASA said.

Peering through the thick dust clouds of the galactic bulge, an international team of astronomers revealed the unusual mix of stars in the stellar cluster known as Terzan 5. The new results indicate that Terzan 5 is one of the bulge’s primordial building blocks, most likely the relic of the very early days of the Milky Way.

An artist’s conception of Planet Nine, which would be the farthest planet within our solar system. The similar cluster orbits of extreme objects on the edge of our solar system suggest a massive planet is located there.

An illustration of the orbits of the new and previously known extremely distant Solar System objects. The clustering of most of their orbits indicates that they are likely be influenced by something massive and very distant, the proposed Planet X.

Say hello to dark galaxy Dragonfly 44. Like our Milky Way, it has a halo of spherical clusters of stars around its core.

A classical nova occurs when a white dwarf star gains matter from its secondary star (a red dwarf) over a period of time, causing a thermonuclear reaction on the surface that eventually erupts in a single visible outburst. This creates a 10,000-fold increase in brightness, depicted here in an artist’s rendering.

Gravitational lensing and space warping are visible in this image of near and distant galaxies captured by Hubble.

At the center of our galaxy, the Milky Way, researchers discovered an X-shaped structure within a tightly packed group of stars.

Meet UGC 1382: What astronomers thought was a normal elliptical galaxy (left) was actually revealed to be a massive disc galaxy made up of different parts when viewed with ultraviolet and deep optical data (center and right). In a complete reversal of normal galaxy structure, the center is younger than its outer spiral disk.

NASA’s Hubble Space Telescope captured this image of the Crab Nebula and its “beating heart,” which is a neutron star at the right of the two bright stars in the center of this image. The neutron star pulses 30 times a second. The rainbow colors are visible due to the movement of materials in the nebula occurring during the time-lapse of the image.

The Hubble Space Telescope captured an image of a hidden galaxy that is fainter than Andromeda or the Milky Way. This low surface brightness galaxy, called UGC 477, is over 110 million light-years away in the constellation of Pisces.

On April 19, NASA released new images of bright craters on Ceres. This photo shows the Haulani Crater, which has evidence of landslides from its rim. Scientists believe some craters on the dwarf planet are bright because they are relatively new.

This illustration shows the millions of dust grains NASA’s Cassini spacecraft has sampled near Saturn. A few dozen of them appear to have come from beyond our solar system.

This image from the VLT Survey Telescope at ESO’s Paranal Observatory in Chile shows a stunning concentration of galaxies known as the Fornax Cluster, which can be found in the Southern Hemisphere. At the center of this cluster, in the middle of the three bright blobs on the left side of the image, lies a cD galaxy — a galactic cannibal that has grown in size by consuming smaller galaxies.

This image shows the central region of the Tarantula Nebula in the Large Magellanic Cloud. The young and dense star cluster R136, which contains hundreds of massive stars, is visible in the lower right of the image taken by the Hubble Space Telescope.

In March 2016, astronomers published a paper on powerful red flashes coming from binary system V404 Cygni in 2015. This illustration shows a black hole, similar to the one in V404 Cygni, devouring material from an orbiting star.

This image shows the elliptical galaxy NGC 4889, deeply embedded within the Coma galaxy cluster. There is a gigantic supermassive black hole at the center of the galaxy.

An artist’s impression of 2MASS J2126, which takens 900,000 years to orbit its star, 1 trillion kilometers away.

Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune.

An artist’s impression of what a black hole might look like. In February, researchers in China said they had spotted a super-massive black hole 12 billion times the size of the sun.

Are there are oceans on any of Jupiter’s moons? The Juice probe shown in this artist’s impression aims to find out. Picture courtesy of ESA/AOES

Astronomers have discovered powerful auroras on a brown dwarf that is 20 light-years away. This is an artist’s concept of the phenomenon.

Venus, bottom, and Jupiter shine brightly above Matthews, North Carolina, on Monday, June 29. The apparent close encounter, called a conjunction, has been giving a dazzling display in the summer sky. Although the two planets appear to be close together, in reality they are millions of miles apart.

Jupiter’s icy moon Europa may be the best place in the solar system to look for extraterrestrial life, according to NASA. The moon is about the size of Earth’s moon, and there is evidence it has an ocean beneath its frozen crust that may hold twice as much water as Earth. NASA’s 2016 budget includes a request for $30 million to plan a mission to investigate Europa. The image above was taken by the Galileo spacecraft on November 25, 1999. It’s a 12-frame mosaic and is considered the the best image yet of the side of Europa that faces Jupiter.

This nebula, or cloud of gas and dust, is called RCW 34 or Gum 19. The brightest areas you can see are where the gas is being heated by young stars. Eventually the gas burst outward like champagne after a bottle is uncorked. Scientists call this champagne flow. This new image of the nebula was captured by the European Space Organization’s Very Large Telescope in Chile. RCW 34 is in the constellation Vela in the southern sky. The name means “sails of a ship” in Latin.

The Hubble Space Telescope captured images of Jupiter’s three great moons — Io, Callisto, and Europa — passing by at once.

Using powerful optics, astronomers have found a planet-like body, J1407b, with rings 200 times the size of Saturn’s. This is an artist’s depiction of the rings of planet J1407b, which are eclipsing a star.

A patch of stars appears to be missing in this image from the La Silla Observatory in Chile. But the stars are actually still there behind a cloud of gas and dust called Lynds Dark Nebula 483. The cloud is about 700 light years from Earth in the constellation Serpens (The Serpent).

This is the largest Hubble Space Telescope image ever assembled. It’s a portion of the galaxy next door, Andromeda (M31).

NASA has captured a stunning new image of the so-called “Pillars of Creation,” one of the space agency’s most iconic discoveries. The giant columns of cold gas, in a small region of the Eagle Nebula, were popularized by a similar image taken by the Hubble Space Telescope in 1995.

Astronomers using the Hubble Space pieced together this picture that shows a small section of space in the southern-hemisphere constellation Fornax. Within this deep-space image are 10,000 galaxies, going back in time as far as a few hundred million years after the Big Bang.

Planetary nebula Abell 33 appears ring-like in this image, taken using the European Southern Observatory’s Very Large Telescope. The blue bubble was created when an aging star shed its outer layers and a star in the foreground happened to align with it to create a “diamond engagement ring” effect.

This Hubble image looks a floating marble or a maybe a giant, disembodied eye. But it’s actually a nebula with a giant star at its center. Scientists think the star used to be 20 times more massive than our sun, but it’s dying and is destined to go supernova.

Composite image of B14-65666 showing the distributions of dust (red), oxygen (green), and carbon (blue), observed by ALMA and stars (white) observed by the Hubble Space Telescope.

Artist’s impression of the merging galaxies B14-65666 located 13 billion light years-away.

Read original article here

Newly discovered giant galaxies dwarf the Milky Way

These images show two giant radio galaxies found with using the MeerKAT telescope. The red in both images shows the radio light being emitted by the galaxies against a background of the sky as it is seen in visible light.

This artist’s conception of quasar J0313-1806 depicts it as it was 670 million years after the Big Bang. Quasars are highly energetic objects at the centers of galaxies, powered by black holes and brighter than entire galaxies.

Shown here is a phenomenon known as zodiacal light, which is caused by sunlight reflecting off tiny dust particles in the inner solar system.

This artist’s impression of the distant galaxy ID2299 shows some of its gas being ejected by a “tidal tail” as a result of a merger between two galaxies.

This diagram shows the two most important companion galaxies to the Milky Way: the Large Magellanic Cloud (left) and the Small Magellanic Cloud. It was made using data from the European Space Agency Gaia satellite.

The Blue Ring Nebula is thought to be a never-before-seen phase that occurs after the merger of two stars. Debris flowing out from the merger was sliced by a disk around one of the stars, creating two cones of material glowing in ultraviolet light.

The red supergiant star Betelgeuse, in the constellation of Orion, experienced unprecedented dimming late in 2019. This image was taken in January using the European Southern Observatory’s Very Large Telescope.

This is an infrared image of Apep, a Wolf-Rayet star binary system located 8,000 light-years from Earth.

An artist’s illustration, left, helps visualize the details of an unusual star system, GW Orionis, in the Orion constellation. The system’s circumstellar disk is broken, resulting in misaligned rings around its three stars.

This is a simulation of two spiral black holes that merge and emit gravitational waves.

This artist’s illustration shows the unexpected dimming of the star Betelgeuse.

This extremely distant galaxy, which looks similar to our own Milky Way, appears like a ring of light.

This artist’s interpretation shows the calcium-rich supernova 2019ehk. The orange represents the calcium-rich material created in the explosion. Purple reveals gas shed by the star right before the explosion.

The blue dot at the center of this image marks the approximate location of a supernova event which occurred 140 million light-years from Earth, where a white dwarf exploded and created an ultraviolet flash. It was located close to tail of the Draco constellation.

This radar image captured by NASA’s Magellan mission to Venus in 1991 shows a corona, a large circular structure 120 miles in diameter, named Aine Corona.

When a star’s mass is ejected during a supernova, it expands quickly. Eventually, it will slow and form a hot bubble of glowing gas. A white dwarf will emerge from this gas bubble and move across the galaxy.

The afterglow of short gamma ray burst that was detected 10 billion light-years away is shown here in a circle. This image was taken by the Gemini-North telescope.

This Hubble Space Telescope image shows NGC 7513, a barred spiral galaxy 60 million light-years away. Due to the expansion of the universe, the galaxy appears to be moving away from the Milky Way at an accelerate rate.

This artist’s concept illustration shows what the luminous blue variable star in the Kinman Dwarf galaxy may have looked like before it mysteriously disappeared.

This is an artist’s illustration of a supermassive black hole and its surrounding disk of gas. Inside this disk are two smaller black holes orbiting one another. Researchers identified a flare of light suspected to have come from one such binary pair soon after they merged into a larger black hole.

This image, taken from a video, shows what happens as two objects of different masses merge together and create gravitational waves.

This is an artist’s impression showing the detection of a repeating fast radio burst seen in blue, which is in orbit with an astrophysical object seen in pink.

Fast radio bursts, which make a splash by leaving their host galaxy in a bright burst of radio waves, helped detect “missing matter” in the universe.

A new type of explosion was found in a tiny galaxy 500 million light-years away from Earth. This type of explosion is referred to as a fast blue optical transient.

Astronomers have discovered a rare type of galaxy described as a “cosmic ring of fire.” This artist’s illustration shows the galaxy as it existed 11 billion years ago.

This is an artist’s impression of the Wolfe Disk, a massive rotating disk galaxy in the early universe.

A bright yellow “twist” near the center of this image shows where a planet may be forming around the AB Aurigae star. The image was captured by the European Southern Observatory’s Very Large Telescope.

This artist’s illustration shows the orbits of two stars and an invisible black hole 1,000 light-years from Earth. This system includes one star (small orbit seen in blue) orbiting a newly discovered black hole (orbit in red), as well as a third star in a wider orbit (also in blue).

This illustration shows a star’s core, known as a white dwarf, pulled into orbit around a black hole. During each orbit, the black hole rips off more material from the star and pulls it into a glowing disk of material around the black hole. Before its encounter with the black hole, the star was a red giant in the last stages of stellar evolution.

This artist’s illustration shows the collision of two 125-mile-wide icy, dusty bodies orbiting the bright star Fomalhaut, located 25 light-years away. The observation of the aftermath of this collision was once thought to be an exoplanet.

This is an artist’s impression of the interstellar comet 2I/Borisov as it travels through our solar system. New observations detected carbon monixide in the cometary tail as the sun heated the comet.

This rosette pattern is the orbit of a star, called S2, around the supermassive black hole at the center of our Milky Way galaxy.

This is an artist’s illustration of SN2016aps, which astronomers believe is the brightest supernova ever observed.

This is an artist’s illustration of a brown dwarf, or a “failed star” object, and its magnetic field. The brown dwarf’s atmosphere and magnetic field rotate at different speeds, which allowed astronomers to determine wind speed on the object.

This artist’s illustration shows an intermediate-mass black hole tearing into a star.

This is an artist’s impression of a large star known as HD74423 and its much smaller red dwarf companion in a binary star system. The large star appears to pulsate on one side only, and it’s being distorted by the gravitational pull of its companion star into a teardrop shape.

This is an artist’s impression of two white dwarfs in the process of merging. While astronomers expected that this might cause a supernova, they have found an instance of two white dwarf stars that survived merging.

A combination of space and ground-based telescopes have found evidence for the biggest explosion seen in the universe. The explosion was created by a black hole located in the Ophiuchus cluster’s central galaxy, which has blasted out jets and carved a large cavity in the surrounding hot gas.

This new ALMA image shows the outcome of a stellar fight: a complex and stunning gas environment surrounding the binary star system HD101584.

NASA’s Spitzer Space Telescope captured the Tarantula Nebula in two wavelengths of infrared light. The red represents hot gas, while the blue regions are interstellar dust.

A white dwarf, left, is pulling material off of a brown dwarf, right, about 3,000 light-years from Earth.

This image shows the orbits of the six G objects at the center of our galaxy, with the supermassive black hole indicated with a white cross. Stars, gas and dust are in the background.

After stars die, they expel their particles out into space, which form new stars in turn. In one case, stardust became embedded in a meteorite that fell to Earth. This illustration shows that stardust could flow from sources like the Egg Nebula to create the grains recovered from the meteorite, which landed in Australia.

The former North Star, Alpha Draconis or Thuban, is circled here in an image of the northern sky.

Galaxy UGC 2885, nicknamed the “Godzilla galaxy,” may be the largest one in the local universe.

The host galaxy of a newly traced repeating fast radio burst acquired with the 8-meter Gemini-North telescope.

The Milky Way’s central region was imaged using the European Southern Observatory’s Very Large Telescope.

This is an artist’s illustration of what MAMBO-9 would look like in visible light. The galaxy is very dusty and it has yet to build most of its stars. The two components show that the galaxy is in the process of merging.

Astronomers have found a white dwarf star surrounded by a gas disk created from an ice giant planet being torn apart by its gravity.

New measurements of the black hole at the center of the Holm 15A galaxy reveal it’s 40 billion times more massive than our sun, making it the heaviest known black hole to be directly measured.

A close-up view of an interstellar comet passing through our solar system can be seen on the left. On the right, astronomers used an image of Earth for comparison.

The galaxy NGC 6240 hosts three supermassive black holes at its core.

Gamma-ray bursts are shown in this artist’s illustration. They can be triggered by the collision or neutron stars or the explosion of a super massive star, collapsing into a black hole.

Two gaseous clouds resembling peacocks have been found in neighboring dwarf galaxy the Large Magellanic Cloud. In these images by the ALMA telescopes, red and green highlight molecular gas while blue shows ionized hydrogen gas.

An artist’s impression of the Milky Way’s big black hole flinging a star from the galaxy’s center.

The Jack-o’-lantern Nebula is on the edge of the Milky Way. Radiation from the massive star at its center created spooky-looking gaps in the nebula that make it look like a carved pumpkin.

This new image from the NASA/ESA Hubble Space Telescope captures two galaxies of equal size in a collision that appears to resemble a ghostly face. This observation was made on 19 June 2019 in visible light by the telescope’s Advanced Camera for Surveys.

A new SPHERE/VLT image of Hygiea, which could be the Solar System’s smallest dwarf planet yet. As an object in the main asteroid belt, Hygiea satisfies right away three of the four requirements to be classified as a dwarf planet: it orbits around the Sun, it is not a moon and, unlike a planet, it has not cleared the neighbourhood around its orbit. The final requirement is that it have enough mass that its own gravity pulls it into a roughly spherical shape. This is what VLT observations have now revealed about Hygiea.

This is an artist’s rendering of what a massive galaxy from the early universe might look like. The rendering shows that star formation in the galaxy is lighting up the surrounding gas. Image by James Josephides/Swinburne Astronomy Productions, Christina Williams/University of Arizona and Ivo Labbe/Swinburne.

This is an artist’s illustration of gas and dust disk around the star HD 163296. Gaps in the disk are likely the location of baby planets that are forming.

This is a two-color composite image of comet 2I/Borisov captured by the Gemini North telescope on September 10.

This illustration shows a young, forming planet in a “baby-proof” star system.

Using a simulation, astronomers shed light on the faint gaseous filaments that comprise the cosmic web in a massive galaxy cluster.

The Hubble Space Telescope’s Wide Field Camera observed Saturn in June as the planet made its closest approach to Earth this year, at approximately 1.36 billion kilometers away.

An artist’s impression of the massive bursts of ionizing radiation exploding from the center of the Milky Way and impacting the Magellanic Stream.

The Atacama Large Millimeter/submillimeter Array captured this unprecedented image of two circumstellar disks, in which baby stars are growing, feeding off material from their surrounding birth disk.

This is an artist’s illustration of what a Neptune-size moon would look like orbiting the gas giant exoplanet Kepler-1625b in a star system 8,000 light-years from Earth. It could be the first exomoon ever discovered.

This infrared image from NASA’s Spitzer Space Telescope shows a cloud of gas and dust full of bubbles, which are inflated by wind and radiation from massive young stars. Each bubble is filled with hundreds to thousands of stars, which form from dense clouds of gas and dust.

This is an artist’s impression of the path of the fast radio burst FRB 181112 traveling from a distant host galaxy to reach the Earth. It passed through the halo of a galaxy on the way.

After passing too close to a supermassive black hole, the star in this artist’s conception is torn into a thin stream of gas, which is then pulled back around the black hole and slams into itself, creating a bright shock and ejecting more hot material.

Comparison of GJ 3512 to the Solar System and other nearby red-dwarf planetary systems. Planets around a solar-mass stars can grow until they start accreting gas and become giant planets such as Jupiter, in a few millions of years. But we thought that small stars such asProxima, TRAPPIST-1, TeegardernÕs star and GJ 3512, could not form Jupiter mass planets.

A collision of three galaxies has set three supermassive black holes on a crash course with each other in a system one billion light-years from Earth.

2I/Borisov is the first interstellar comet observed in our solar system and only the second observed interstellar visitor to our solar system.

KIC 8462852, also known as Boyajian’s Star or Tabby’s Star, is 1,000 light-years from us. It’s 50% bigger than our sun and 1,000 degrees hotter. And it doesn’t behave like any other star, dimming and brightening sporadically. Dust around the star, depicted here in an artist’s illustration, may be the most likely cause of its strange behavior.

This is an artist’s impression of a massive neutron star’s pulse being delayed by the passage of a white dwarf star between the neutron star and Earth. Astronomers have detected the most massive neutron star to date due to this delay.

The European Southern Observatory’s VISTA telescope captured a stunning image of the Large Magellanic Cloud, one of our nearest galactic neighbors. The near-infrared capability of the telescope showcases millions of individual stars.

Astronomers believe Comet C/2019 Q4 could be the second known interstellar visitor to our solar system. It was first spotted on August 30 and imaged by the Canada-France-Hawaii Telescope on Hawaii’s Big Island on September 10, 2019.

A star known as S0-2, represented as the blue and green object in this artist’s illustration, made its closest approach to the supermassive black hole at the center of the Milky Way in 2018. This provided a test for Einstein’s theory of general relativity.

This is a radio image of the Milky Way’s galactic center. The radio bubbles discovered by MeerKAT extend vertically above and below the plane of the galaxy.

A kilanova was captured by the Hubble Space Telescope in 2016, seen here next to the red arrow. Kilanovae are massive explosions that create heavy elements like gold and platinum.

This is an artist’s depiction of a black hole about to swallow a neutron star. Detectors signaled this possible event on August 14.

This artist’s illustration shows LHS 3844b, a rocky nearby exoplanet. It’s 1.3 times the mass of Earth and orbits a cool M-dwarf star. The planet’s surface is probably dark and covered in cooled volcanic material, and there is no detectable atmosphere.

An artist’s concept of the explosion of a massive star within a dense stellar environment.

Galaxy NGC 5866 is 44 million light-years from Earth. It appears flat because we can only see its edge in this image captured by NASA’s Spitzer Space Telescope.

The Hubble Space Telescope took a dazzling new portrait of Jupiter, showcasing its vivid colors and swirling cloud features in the atmosphere.

This is an artist’s impression of the ancient massive and distant galaxies observed with ALMA.

Glowing gas clouds and newborn stars make up the Seagull Nebula in one of the Milky Way galaxy’s spiral arms.

An artist’s concept of what the first stars looked like soon after the Big Bang.

Spiral galaxy NGC 2985 lies roughly over 70 million light years from our solar system in the constellation of Ursa Major.

Early in the history of the universe, the Milky Way galaxy collided with a dwarf galaxy, left, which helped form our galaxy’s ring and structure as it’s known today.

An artist’s illustration of a thin disc embedded in a supermassive black hole at the center of spiral galaxy NGC 3147, 130 million light-years away.

Hubble captured this view of a spiral galaxy named NGC 972 that appears to be blooming with new star formation. The orange glow is created as hydrogen gas reacts to the intense light streaming outwards from nearby newborn stars.

This is jellyfish galaxy JO201.

The Eta Carinae star system, located 7,500 light-years from Earth, experienced a great explosion in 1838 and the Hubble Space Telescope is still capturing the aftermath. This new ultraviolet image reveals the warm glowing gas clouds that resemble fireworks.

‘Oumuamua, the first observed interstellar visitor to our solar system, is shown in an artist’s illustration.

This is an artist’s rendering of ancient supernovae that bombarded Earth with cosmic energy millions of years ago.

An artist’s impression of CSIRO’s Australian SKA Pathfinder radio telescope finding a fast radio burst and determining its precise location.

The Whirlpool galaxy has been captured in different light wavelengths. On the left is a visible light image. The next image combines visible and infrared light, while the two on the right show different wavelengths of infrared light.

Electrically charged C60 molecules, in which 60 carbon atoms are arranged in a hollow sphere that resembles a soccer ball, was found by the Hubble Space Telescope in the interstellar medium between star systems.

These are magnified galaxies behind large galaxy clusters. The pink halos reveal the gas surrounding the distant galaxies and its structure. The gravitational lensing effect of the clusters multiplies the images of the galaxies.

This artist’s illustration shows a blue quasar at the center of a galaxy.

The NICER detector on the International Space Station recorded 22 months of nighttime X-ray data to create this map of the entire sky.

NASA’s Spitzer Space Telescope captured this mosaic of the star-forming Cepheus C and Cepheus B regions.

Galaxy NGC 4485 collided with its larger galactic neighbor NGC 4490 millions of years ago, leading to the creation of new stars seen in the right side of the image.

Astronomers developed a mosaic of the distant universe, called the Hubble Legacy Field, that documents 16 years of observations from the Hubble Space Telescope. The image contains 200,000 galaxies that stretch back through 13.3 billion years of time to just 500 million years after the Big Bang.

A ground-based telescope’s view of the Large Magellanic Cloud, a neighboring galaxy of our Milky Way. The inset was taken by the Hubble Space Telescope and shows one of the star clusters in the galaxy.

One of the brightest planetary nebulae on the sky and first discovered in 1878, nebula NGC 7027 can be seen toward the constellation of the Swan.

The asteroid 6478 Gault is seen with the NASA/ESA Hubble Space Telescope, showing two narrow, comet-like tails of debris that tell us that the asteroid is slowly undergoing self-destruction. The bright streaks surrounding the asteroid are background stars. The Gault asteroid is located 214 million miles from the Sun, between the orbits of Mars and Jupiter.

The ghostly shell in this image is a supernova, and the glowing trail leading away from it is a pulsar.

Hidden in one of the darkest corners of the Orion constellation, this Cosmic Bat is spreading its hazy wings through interstellar space two thousand light-years away. It is illuminated by the young stars nestled in its core — despite being shrouded by opaque clouds of dust, their bright rays still illuminate the nebula.

In this illustration, several dust rings circle the sun. These rings form when planets’ gravities tug dust grains into orbit around the sun. Recently, scientists have detected a dust ring at Mercury’s orbit. Others hypothesize the source of Venus’ dust ring is a group of never-before-detected co-orbital asteroids.

This is an artist’s impression of globular star clusters surrounding the Milky Way.

An artist’s impression of life on a planet in orbit around a binary star system, visible as two suns in the sky.

An artist’s illustration of one of the most distant solar system objects yet observed, 2018 VG18 — also known as “Farout.” The pink hue suggests the presence of ice. We don’t yet have an idea of what “FarFarOut” looks like.

This is an artist’s concept of the tiny moon Hippocamp that was discovered by the Hubble Space Telescope. Only 20 miles across, it may actually be a broken-off fragment from a much larger neighboring moon, Proteus, seen as a crescent in the background.

In this illustration, an asteroid (bottom left) breaks apart under the powerful gravity of LSPM J0207+3331, the oldest, coldest white dwarf known to be surrounded by a ring of dusty debris. Scientists think the system’s infrared signal is best explained by two distinct rings composed of dust supplied by crumbling asteroids.

An artist’s impression of the warped and twisted Milky Way disk. This happens when the rotational forces of the massive center of the galaxy tug on the outer disk.

This 1.3-kilometer (0.8-mile)-radius Kuiper Belt Object discovered by researchers on the edge of the solar system is believed to be the step between balls of dust and ice and fully formed planets.

A selfie taken by NASA’s Curiosity Mars rover on Vera Rubin Ridge before it moves to a new location.

The Hubble Space Telescope found a dwarf galaxy hiding behind a big star cluster that’s in our cosmic neighborhood. It’s so old and pristine that researchers have dubbed it a “living fossil” from the early universe.

How did massive black holes form in the early universe? The rotating gaseous disk of this dark matter halo breaks apart into three clumps that collapse under their own gravity to form supermassive stars. Those stars will quickly collapse and form massive black holes.

NASA’s Spitzer Space Telescope captured this image of the Large Magellanic Cloud, a satellite galaxy to our own Milky Way galaxy. Astrophysicists now believe it could collide with our galaxy in two billion years.

A mysterious bright object in the sky, dubbed “The Cow,” was captured in real time by telescopes around the world. Astronomers believe that it could be the birth of a black hole or neutron star, or a new class of object.

An illustration depicts the detection of a repeating fast radio burst from a mysterious source 3 billion light-years from Earth.

Comet 46P/Wirtanen will pass within 7 million miles of Earth on December 16. It’s ghostly green coma is the size of Jupiter, even though the comet itself is about three-quarters of a mile in diameter.

This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on December 2 by the OSIRIS-REx spacecraft from a range of 15 miles.

This image of a globular cluster of stars by the Hubble Space Telescope is one of the most ancient collections of stars known. The cluster, called NGC 6752, is more than 10 billion years old.

An image of Apep captured with the VISIR camera on the European Southern Observatory’s Very Large Telescope. This “pinwheel” star system is most likely doomed to end in a long-duration gamma-ray burst.

An artist’s impression of galaxy Abell 2597, showing the supermassive black hole expelling cold molecular gas like the pump of a giant intergalactic fountain.

An image of the Wild Duck Cluster, where every star is roughly 250 million years old.

These images reveal the final stage of a union between pairs of galactic nuclei in the messy cores of colliding galaxies.

A radio image of hydrogen gas in the Small Magellanic Cloud. Astronomers believe that the dwarf galaxy is slowly dying and will eventually be consumed by the Milky Way.

Further evidence of a supermassive black hole at the center of the Milky Way galaxy has been found. This visualization uses data from simulations of orbital motions of gas swirling around about 30% of the speed of light on a circular orbit around the black hole.

Does this look like a bat to you? This giant shadow comes from a bright star reflecting against the dusty disk surrounding it.

Hey, Bennu! NASA’s OSIRIS-REx mission, on its way to meet the primitive asteroid Bennu, is sending back images as it gets closer to its December 3 target.

These three panels reveal a supernova before, during and after it happened 920 million light-years from Earth(from left to right). The supernova, dubbed iPTF14gqr, is unusual because although the star was massive, its explosion was quick and faint. Researchers believe this is due to a companion star that siphoned away its mass.

An artist’s illustration of Planet X, which could be shaping the orbits of smaller extremely distant outer solar system objects like 2015 TG387.

This is an artist’s concept of what SIMP J01365663+0933473 might look like. It has 12.7 times the mass of Jupiter but a magnetic field 200 times more powerful than Jupiter’s. This object is 20 light-years from Earth. It’s on the boundary line between being a planet or being a brown dwarf.

The Andromeda galaxy cannibalized and shredded the once-large galaxy M32p, leaving behind this compact galaxy remnant known as M32. It is completely unique and contains a wealth of young stars.

Twelve new moons have been found around Jupiter. This graphic shows various groupings of the moons and their orbits, with the newly discovered ones shown in bold.

Scientists and observatories around the world were able to trace a high-energy neutrino to a galaxy with a supermassive, rapidly spinning black hole at its center, known as a blazar. The galaxy sits to the left of Orion’s shoulder in his constellation and is about 4 billion light-years from Earth.

Planets don’t just appear out of thin air — but they do require gas, dust and other processes not fully understood by astronomers. This is an artist’s impression of what “infant” planets look like forming around a young star.

These negative images of 2015 BZ509, which is circled in yellow, show the first known interstellar object that has become a permanent part of our solar system. The exo-asteroid was likely pulled into our solar system from another star system 4.5 billion years ago. It then settled into a retrograde orbit around Jupiter.

A close look at the diamond matrix in a meteorite that landed in Sudan in 2008. This is considered to be the first evidence of a proto-planet that helped form the terrestrial planets in our solar system.

2004 EW95 is the first carbon-rich asteroid confirmed to exist in the Kuiper Belt and a relic of the primordial solar system. This curious object probably formed in the asteroid belt between Mars and Jupiter before being flung billions of miles to its current home in the Kuiper Belt.

The NASA/ESA Hubble Space Telescope is celebrating its 28th anniversary in space with this stunning and colorful image of the Lagoon Nebula 4,000 light-years from Earth. While the whole nebula is 55 light-years across, this image only reveals a portion of about four light-years.

This is a more star-filled view of the Lagoon Nebula, using Hubble’s infrared capabilities. The reason you can see more stars is because infrared is able to cut through the dust and gas clouds to reveal the abundance of both young stars within the nebula, as well as more distant stars in the background.

The Rosette Nebula is 5,000 light-years from Earth. The distinctive nebula, which some claim looks more like a skull, has a hole in the middle that creates the illusion of its rose-like shape.

This inner slope of a Martian crater has several of the seasonal dark streaks called “recurrent slope lineae,” or RSL, that a November 2017 report interprets as granular flows, rather than darkening due to flowing water. The image is from the HiRISE camera on NASA’s Mars Reconnaissance Orbiter.

This artist’s impression shows a supernova explosion, which contains the luminosity of 100 million suns. Supernova iPTF14hls, which has exploded multiple times, may be the most massive and longest-lasting ever observed.

This illustration shows hydrocarbon compounds splitting into carbon and hydrogen inside ice giants, such as Neptune, turning into a “diamond (rain) shower.”

This striking image is the stellar nursery in the Orion Nebula, where stars are born. The red filament is a stretch of ammonia molecules measuring 50 light-years long. The blue represents the gas of the Orion Nebula. This image is a composite of observation from the Robert C. Byrd Green Bank Telescope and NASA’s Wide-field Infrared Survey Explore telescope. “We still don’t understand in detail how large clouds of gas in our Galaxy collapse to form new stars,” said Rachel Friesen, one of the collaboration’s co-Principal Investigators. “But ammonia is an excellent tracer of dense, star-forming gas.”

This is what Earth and its moon look like from Mars. The image is a composite of the best Earth image and the best moon image taken on November 20, 2016, by NASA’s Mars Reconnaissance Orbiter. The orbiter’s camera takes images in three wavelength bands: infrared, red and blue-green. Mars was about 127 million miles from Earth when the images were taken.

PGC 1000714 was initially thought to be a common elliptical galaxy, but a closer analysis revealed the incredibly rare discovery of a Hoag-type galaxy. It has a round core encircled by two detached rings.

NASA’s Cassini spacecraft took these images of the planet’s mysterious hexagon-shaped jetstream in December 2016. The hexagon was discovered in images taken by the Voyager spacecraft in the early 1980s. It’s estimated to have a diameter wider than two Earths.

A dead star gives off a greenish glow in this Hubble Space Telescope image of the Crab Nebula, located about 6,500 light years from Earth in the constellation Taurus. NASA released the image for Halloween 2016 and played up the theme in its press release. The agency said the “ghoulish-looking object still has a pulse.” At the center of the Crab Nebula is the crushed core, or “heart” of an exploded star. The heart is spinning 30 times per second and producing a magnetic field that generates 1 trillion volts, NASA said.

Peering through the thick dust clouds of the galactic bulge, an international team of astronomers revealed the unusual mix of stars in the stellar cluster known as Terzan 5. The new results indicate that Terzan 5 is one of the bulge’s primordial building blocks, most likely the relic of the very early days of the Milky Way.

An artist’s conception of Planet Nine, which would be the farthest planet within our solar system. The similar cluster orbits of extreme objects on the edge of our solar system suggest a massive planet is located there.

An illustration of the orbits of the new and previously known extremely distant Solar System objects. The clustering of most of their orbits indicates that they are likely be influenced by something massive and very distant, the proposed Planet X.

Say hello to dark galaxy Dragonfly 44. Like our Milky Way, it has a halo of spherical clusters of stars around its core.

A classical nova occurs when a white dwarf star gains matter from its secondary star (a red dwarf) over a period of time, causing a thermonuclear reaction on the surface that eventually erupts in a single visible outburst. This creates a 10,000-fold increase in brightness, depicted here in an artist’s rendering.

Gravitational lensing and space warping are visible in this image of near and distant galaxies captured by Hubble.

At the center of our galaxy, the Milky Way, researchers discovered an X-shaped structure within a tightly packed group of stars.

Meet UGC 1382: What astronomers thought was a normal elliptical galaxy (left) was actually revealed to be a massive disc galaxy made up of different parts when viewed with ultraviolet and deep optical data (center and right). In a complete reversal of normal galaxy structure, the center is younger than its outer spiral disk.

NASA’s Hubble Space Telescope captured this image of the Crab Nebula and its “beating heart,” which is a neutron star at the right of the two bright stars in the center of this image. The neutron star pulses 30 times a second. The rainbow colors are visible due to the movement of materials in the nebula occurring during the time-lapse of the image.

The Hubble Space Telescope captured an image of a hidden galaxy that is fainter than Andromeda or the Milky Way. This low surface brightness galaxy, called UGC 477, is over 110 million light-years away in the constellation of Pisces.

On April 19, NASA released new images of bright craters on Ceres. This photo shows the Haulani Crater, which has evidence of landslides from its rim. Scientists believe some craters on the dwarf planet are bright because they are relatively new.

This illustration shows the millions of dust grains NASA’s Cassini spacecraft has sampled near Saturn. A few dozen of them appear to have come from beyond our solar system.

This image from the VLT Survey Telescope at ESO’s Paranal Observatory in Chile shows a stunning concentration of galaxies known as the Fornax Cluster, which can be found in the Southern Hemisphere. At the center of this cluster, in the middle of the three bright blobs on the left side of the image, lies a cD galaxy — a galactic cannibal that has grown in size by consuming smaller galaxies.

This image shows the central region of the Tarantula Nebula in the Large Magellanic Cloud. The young and dense star cluster R136, which contains hundreds of massive stars, is visible in the lower right of the image taken by the Hubble Space Telescope.

In March 2016, astronomers published a paper on powerful red flashes coming from binary system V404 Cygni in 2015. This illustration shows a black hole, similar to the one in V404 Cygni, devouring material from an orbiting star.

This image shows the elliptical galaxy NGC 4889, deeply embedded within the Coma galaxy cluster. There is a gigantic supermassive black hole at the center of the galaxy.

An artist’s impression of 2MASS J2126, which takens 900,000 years to orbit its star, 1 trillion kilometers away.

Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune.

An artist’s impression of what a black hole might look like. In February, researchers in China said they had spotted a super-massive black hole 12 billion times the size of the sun.

Are there are oceans on any of Jupiter’s moons? The Juice probe shown in this artist’s impression aims to find out. Picture courtesy of ESA/AOES

Astronomers have discovered powerful auroras on a brown dwarf that is 20 light-years away. This is an artist’s concept of the phenomenon.

Venus, bottom, and Jupiter shine brightly above Matthews, North Carolina, on Monday, June 29. The apparent close encounter, called a conjunction, has been giving a dazzling display in the summer sky. Although the two planets appear to be close together, in reality they are millions of miles apart.

Jupiter’s icy moon Europa may be the best place in the solar system to look for extraterrestrial life, according to NASA. The moon is about the size of Earth’s moon, and there is evidence it has an ocean beneath its frozen crust that may hold twice as much water as Earth. NASA’s 2016 budget includes a request for $30 million to plan a mission to investigate Europa. The image above was taken by the Galileo spacecraft on November 25, 1999. It’s a 12-frame mosaic and is considered the the best image yet of the side of Europa that faces Jupiter.

This nebula, or cloud of gas and dust, is called RCW 34 or Gum 19. The brightest areas you can see are where the gas is being heated by young stars. Eventually the gas burst outward like champagne after a bottle is uncorked. Scientists call this champagne flow. This new image of the nebula was captured by the European Space Organization’s Very Large Telescope in Chile. RCW 34 is in the constellation Vela in the southern sky. The name means “sails of a ship” in Latin.

The Hubble Space Telescope captured images of Jupiter’s three great moons — Io, Callisto, and Europa — passing by at once.

Using powerful optics, astronomers have found a planet-like body, J1407b, with rings 200 times the size of Saturn’s. This is an artist’s depiction of the rings of planet J1407b, which are eclipsing a star.

A patch of stars appears to be missing in this image from the La Silla Observatory in Chile. But the stars are actually still there behind a cloud of gas and dust called Lynds Dark Nebula 483. The cloud is about 700 light years from Earth in the constellation Serpens (The Serpent).

This is the largest Hubble Space Telescope image ever assembled. It’s a portion of the galaxy next door, Andromeda (M31).

NASA has captured a stunning new image of the so-called “Pillars of Creation,” one of the space agency’s most iconic discoveries. The giant columns of cold gas, in a small region of the Eagle Nebula, were popularized by a similar image taken by the Hubble Space Telescope in 1995.

Astronomers using the Hubble Space pieced together this picture that shows a small section of space in the southern-hemisphere constellation Fornax. Within this deep-space image are 10,000 galaxies, going back in time as far as a few hundred million years after the Big Bang.

Planetary nebula Abell 33 appears ring-like in this image, taken using the European Southern Observatory’s Very Large Telescope. The blue bubble was created when an aging star shed its outer layers and a star in the foreground happened to align with it to create a “diamond engagement ring” effect.

This Hubble image looks a floating marble or a maybe a giant, disembodied eye. But it’s actually a nebula with a giant star at its center. Scientists think the star used to be 20 times more massive than our sun, but it’s dying and is destined to go supernova.

Composite image of B14-65666 showing the distributions of dust (red), oxygen (green), and carbon (blue), observed by ALMA and stars (white) observed by the Hubble Space Telescope.

Artist’s impression of the merging galaxies B14-65666 located 13 billion light years-away.

Read original article here

Solar system formation in two steps

The inner terrestrial protoplanets accrete early, inherit a substantial amount of radioactive 26Al, and hence melt, form iron cores, and degas their primordial volatile abundances rapidly. The outer Solar System planets start to accrete later and further out with less radiogenic heating, and hence retain the majority of their initially accreted volatiles. Credit: Mark A Garlick/markgarlick.com

An international team of researchers from the University of Oxford, LMU Munich, ETH Zurich, BGI Bayreuth, and the University of Zurich discovered that a two-step formation process of the early Solar System can explain the chronology and split in volatile and isotope content of the inner and outer Solar System.

Their findings will be published in Science.

The paper presents a new theoretical framework for the formation and structure of the Solar System that can explain several key features of the terrestrial planets (like Earth, Venus, and Mars), outer Solar System (like Jupiter), and composition of asteroids and meteorite families. The team’s work draws on and connects recent advances in astronomy (namely observations of other solar systems during their formation) and meteoritics—laboratory experiments and analyses on the isotope, iron, and water content in meteorites.

The suggested combination of astrophysical and geophysical phenomena during the earliest formation phase of the Sun and the Solar System itself can explain why the inner Solar System planets are small and dry with little water by mass, while the outer Solar System planets are larger and wet with lots of water. It explains the meteorite record by forming planets in two distinct steps. The inner terrestrial protoplanets accreted early and were internally heated by strong radioactive decay; this dried them out and split the inner, dry from the outer, wet planetary population. This has several implications for the distribution and necessary formation conditions of planets like Earth in extrasolar planetary systems.







https://scx2.b-cdn.net/gfx/video/2021/600973531b3e6.mp4
Video introduction of main concepts of the research. Credit: Tim Lichtenberg

The numerical experiments performed by the interdisciplinary team showed that the relative chronologies of early onset and protracted finish of accretion in the inner Solar System, and a later onset and more rapid accretion of the outer Solar System planets can be explained by two distinct formation epochs of planetesimals, the building blocks of the planets. Recent observations of planet-forming disks showed that disk midplanes, where planets form, may have relatively low levels of turbulence. Under such conditions the interactions between the dust grains embedded in the disk gas and water around the orbital location where it transitions from gas to ice phase (the snow line) can trigger an early formation burst of planetesimals in the inner Solar System and another one later and further out.

The two distinct formation episodes of the planetesimal populations, which further accrete material from the surrounding disk and via mutual collisions, result in different geophysical modes of internal evolution for the forming protoplanets. Dr. Tim Lichtenberg from the Department of Atmospheric, Oceanic and Planetary Physics at the University of Oxford and lead-author of the study notes: “The different formation time intervals of these planetesimal populations mean that their internal heat engine from radioactive decay differed substantially. Inner Solar System planetesimals became very hot, developed internal magma oceans, quickly formed iron cores, and degassed their initial volatile content, which eventually resulted in dry planet compositions. In comparison, outer Solar System planetesimals formed later and therefore experienced substantially less internal heating and therefore limited iron core formation, and volatile release.

“The early-formed and dry inner Solar System and the later-formed and wet outer Solar System were therefore set on two different evolutionary paths very early on in their history. This opens new avenues to understand the origins of the earliest atmospheres of Earth-like planets and the place of the Solar System within the context of the exoplanetary census across the galaxy.”

This research was supported by funding from the Simons Collaboration on the Origins of Life, the Swiss National Science Foundation, and the European Research Council.

The full study, “Bifurcation of planetary building blocks during Solar System formation,” will be published on 22 January 2021 in Science, 371, 6527.


Reconstructing the solar system’s original architecture


More information:
“Bifurcation of planetary building blocks during Solar System formation” Science (2021). science.sciencemag.org/cgi/doi … 1126/science.abb3091
Provided by
University of Oxford

Citation:
Solar system formation in two steps (2021, January 21)
retrieved 22 January 2021
from https://phys.org/news/2021-01-solar-formation.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



Read original article here

SpaceX aborts several Starship static fire attempts, rolls test tank to the pad

Accidentally producing the polar opposite of Starship serial number 9 (SN9) completing a trio of Raptor ignition tests in four hours last week, SpaceX has now suffered three back-to-back static fire aborts on January 20th.

On January 13th, Starship SN9 somewhat successfully ignited its Raptor engines three separate times with zero hands-on human intervention or inspection. While an impressive feat, SpaceX CEO Elon Musk soon revealed that two of the rocket’s three engines were damaged during the test campaign. NASASpaceflight.com later reported that the company had detected an issue with one Raptor after the first three-engine static fire, ultimately firewalling it and performing the next two static fires with only two engines.

SpaceX initially allotted five days to replace the two damaged Raptors (SN44 & SN46), scheduling road closures (a telltale sign of test plans) on January 18th, 19th, and 20th. Windows on the 18th and 19th went by with zero attempts. Finally, on the 20th, SpaceX kicked off Starship SN9’s first real test attempt since the engine swap around 2pm but it was aborted by 3pm.

After an extremely brisk recycle, Starship likely made it less than a minute away from ignition but the second attempt was ultimately aborted around 3:40 pm.

Two hours later, after SpaceX extended the end of its road closure from 5pm to 8pm, Starship SN9’s third Raptor static fire attempt was also aborted – once again just a minute or less away from ignition.

SpaceX held Starship SN9 for another hour or so after the third abort but ultimately began final detanking and depressurization around 6:50 pm, marking the end of the day’s attempts.

It’s impossible to say what caused Wednesday’s back-to-back-to-back aborts or if the three instances were connected. While potentially frustrating to watch from the sidelines, it’s crucial to remember that the public is getting a truly unprecedented continuous view of SpaceX’s process of developing and refining a world-class launch vehicle. Additionally, every abort Starship suffers should theoretically produce volumes of valuable data that both Starship and Raptor teams can use to better understand how to design, build, test, and operate the cutting-edge vehicle and its engines.

More likely than not, SpaceX is leaning towards caution (and thus cautious hardware and software limits) while attempting to prepare Starship SN9 for its true data-gathering purpose – an SN8-style high-altitude launch and landing attempt.

Starship SN8’s launch and (explosive) landing debut. SN9’s goal is to replicate the feat without the last-second explosion. (Richard Angle)

SpaceX is currently scheduled to try again with another series of Starship SN9 static fire attempts between 8am and 5pm CST (UTC-6) on Thursday, January 21st.

Meanwhile, prior to SN9’s multiple Wednesday aborts, SpaceX rolled the latest in a series of Starship ‘test tanks’ from the factory to the launch pad. A team rapidly strapped the tank to the concrete pad and connected it to ground support equipment in preparation for a series of tests that will likely end with SpaceX intentionally pressurizing the tank until its bursts. If successful, it will open the door for future Starships to save weight by cutting steel skin thickness from 4mm to 3mm.

Stay tuned for updates on both active test campaigns.



Read original article here

Paleontologists Gain Insight Into a Dinosaur’s Butt


(Newser)

It’s a first for paleontology, and one that might produce a giggle. For the first time, scientists have been able to describe in fine detail a dinosaur’s cloaca. If you’re not familiar with that body part, CNET translates: It’s essentially “a jack-of-all-trades butthole.” The study published Tuesday in Current Biology concerns a dog-size herbivore that lived about 120 million years ago called Psittacosaurus. Scientists with the University of Bristol write that “it was previously noted that the cloacal region was preserved” though flattened in this fossil, found decades ago in China, but the detailed anatomy of the region hadn’t been properly reconstructed. That’s what they managed, via a 3D model of the opening of the orifice, which was used for defecation, urination, copulation, and birth.

The New York Times notes “cloaca” comes from the Latin word for “sewer,” and it’s not at all unique to dinosaurs: Some modern birds, reptiles, amphibians, and a handful of mammals have one, but to the researchers’ knowledge, the cloaca isn’t preserved in any other non-avian dinosaur fossil. So how does this one measure up to those we’re familiar with? It’s definitely in a class of its own, but most like those seen in crocodiles and alligators. While most cloacal openings, or vents, appear as slits or holes, that of the Psittacosaurus has “discrete lateral lips, but they only converge anteriorly, giving the cloaca a unique v-shape anatomy,” per the study. Those lips were heavily pigmented, indicating they might have a signaling function, perhaps a sexual one; it’s possible they also held musk glands. (Read more discoveries stories.)

var FBAPI = '119343999649';

window.fbAsyncInit = function() { FB.init({ appId: FBAPI, status: true, cookie: true, xfbml: true, oauth: true, authResponse: true, version: 'v2.5' });

FB.Event.subscribe('edge.create', function (response) { AnalyticsCustomEvent('Facebook', 'Like', 'P'); }); };

// Load the SDK asynchronously (function (d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "https://connect.facebook.net/en_US/sdk.js"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk'));



Read original article here

Giant worm’s undersea lair discovered by fossil hunters in Taiwan | Science

The undersea lair of a giant worm that ambushed passing marine creatures 20m years ago has been uncovered by fossil hunters in Taiwan.

Researchers believe the 2-metre-long burrow found in ancient marine sediment once housed a prehistoric predator that burst out of the seabed and dragged unsuspecting animals down into its lair.

The creature may have been similar to the ferocious “Bobbit worms” of today that lie in wait in sandy seafloor burrows with antennae protruding to sense passersby. Though soft-bodied, the worms possess sharp and powerful jaws that can slice a fish in two.

“After 20m years, it’s not possible to say whether this was made by an ancestor of the Bobbit worm or another predatory worm that worked in more or less the same way,” said Prof Ludvig Löwemark, a sedimentologist at National Taiwan University. “There’s huge variation in Bobbit worm behaviour, but this seems very similar to the shallow water worms that reach out, grab fish and pull them down.”

An illustration shows how the worms may have captured their prey. Photograph: Supplied

Bobbit worms, or Eunice aphroditois, take their names from the John and Lorena Bobbitt case, in which the latter – after years of physical and sexual abuse – cut off the former’s penis with a kitchen knife.

Löwemark and his colleagues discovered the fossilised lair and others like it while studying 20m-year-old sedimentary rock on the north-eastern coast of Taiwan. The burrows are strengthened with mucus and are more resilient to weathering, meaning they sometimes protrude from the fine sandstone rock faces.

The scientists were initially mystified by the trace fossils, but gradually converged on a likely suspect. At the top of the 3cm-wide burrows they noticed a distinctive pattern that looked like several inverted funnels stacked on top of each other. This gave the opening of the lair a feathered appearance in cross-section.

Having ruled out other burrowing creatures such as shrimp, and marks left by stingrays that blast the seabed with water jets to expose cowering prey, the researchers concluded the feathered entrance to the lair was caused by a hunting strategy similar to the Bobbit worm’s.

When the worms pull their prey down into their lair, the top of the burrow collapses and the worms have to rebuild it before ambushing their next meal. “This results in the stack of cone-in-cone structures that form the ‘feathers’ around the uppermost part of the tube,” said Löwemark.

Researchers discovered 319 of the shallow burrows in 20m-year-old sandstone. Photograph: Supplied

Writing in the journal Scientific Reports, the researchers describe 319 such shallow water burrows preserved in 20m-year-old sandstone in Yehliu Geopark and on the nearby Badouzi promontory, suggesting the local seafloor was colonised with the beasts. The trace fossil burrows, named Pennichnus formosae, are vertical for the top metre, then run horizontal for another metre or so, perhaps because deeper sediment is harder to burrow into, and the water there is less oxygenated. Bobbit worms breathe by absorbing oxygen through their skin.

The researchers hoped the burrows might contain fossilised remains of prey or the worms themselves, but have found none so far. One reason, Löwemark said, is that burrowing worms often inject their faeces into the water and let it drift away, spreading bone fragments from past meals far and wide.

Löwemark harbours a dream to study Bobbit worms in the wild one day. “They are impressive animals,” he said. “You don’t necessarily want to snorkel too close if you find one.”

Read original article here

Juno maps water ice across northern Ganymede

Jupiter’s moon Ganymede is the largest planetary satellite in the solar system. It’s also one of the most intriguing: Ganymede is the only moon with its own magnetic field, it is the most differentiated of all moons, and it likely possesses a subsurface ocean of liquid water. It was studied by the early Jupiter flybys made by the Pioneer and Voyager spacecraft, but our understanding today rests largely on observations made by NASA’s Galileo orbiter from 1995 to 2003.

Mura et al. now report some of the first in situ observations of Ganymede since the end of the Galileo mission. They used the Jovian Infrared Auroral Mapper (JIRAM) on board NASA’s Juno spacecraft to take images and spectra of the moon’s north polar region. On 26 December 2019, Juno passed Ganymede at a distance of about 100,000 kilometers, enabling JIRAM to map this region at a spatial resolution of up to 23 kilometers per pixel.

As Juno flies past Ganymede, the spacecraft can observe physical locations on the moon’s surface from a variety of angles. By comparing the brightness of these regions across a range of observation and illumination geometries, the authors developed a photometric model for Ganymede’s surface reflectance. They observed that wavelength-dependent reflectance relationships sometimes break down in the vicinity of relatively fresh craters, perhaps because of a larger average size of ice grains in these regions.

Combining their model with spectral observations of the 2-micrometer water ice absorption band allowed the authors to map the distribution of water ice in the north polar region. Where these estimates overlapped with maps derived from Earth-based telescopic observations, the researchers found largely good agreement. This congruence enabled them to extend the global water ice map for Ganymede to much more northerly latitudes.

Observations in other spectral bands also revealed the presence of nonwater chemical species on the surface of Ganymede, including possible detections of hydrated magnesium salts, ammonia, carbon dioxide, and a range of organic molecules.


NASA Juno takes first images of jovian moon Ganymede’s north pole


More information:
A. Mura et al. Infrared Observations of Ganymede From the Jovian InfraRed Auroral Mapper on Juno, Journal of Geophysical Research: Planets (2020). DOI: 10.1029/2020JE006508

Provided by
Eos

This story is republished courtesy of AGU Eos (https://eos.org/). Read the original story here.

Citation:
Juno maps water ice across northern Ganymede (2021, January 21)
retrieved 21 January 2021
from https://phys.org/news/2021-01-juno-ice-northern-ganymede.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



Read original article here

September new moon 2021: See Mercury and Venus in the moonless sky

The new moon arrives on Monday (Sept. 6), and over the next two days makes a close pass to Mercury and then Venus. 

The moon is officially new at 8:52 p.m. EDT (0052 Sept. 7 GMT), according to NASA’s SkyCal. A new moon means the moon is directly between the sun and Earth, sharing the same celestial longitude — this is technically called a conjunction. (The term also applies to other celestial bodies, such as planets). 

The timing of the lunar phases depends on where the moon is relative to the Earth, so it occurs at the same time all over the world — the only differences being due to what time zone you are in. In Melbourne, Australia, for example, the new moon occurs at 10:52 a.m. on Sept. 7, and in London it is at 1:52 a.m. Sept. 7. 

Related: Best night sky events of September 2021 (stargazing maps)   

Orion GoScope II 70 Telescope Moon Kit: $89.99 at Amazon

If you know a youngster who can’t get enough of the moon, then they’ll be delighted with views through the Orion GoScope II. Revealing craters and seas up close, this little telescope comes with a carry case and moon map.View Deal

 A new moon is invisible from Earth unless there is a solar eclipse, when the moon passes in front of the sun. The moon’s orbit is tilted by about 5 degrees relative to the plane of the Earth’s orbit, which is why eclipses don’t happen every month. Most of the time the moon is offset from the sun (from the point of view of Earthbound observers). The next solar eclipse isn’t until Dec. 4, 2021.  

 Young moon meets Mercury  

Mercury and Venus will appear low in the western sky just after sunset on Sept. 5, 2021 ahead of September’s new moon. (Image credit: NASA/JPL-Caltech)

On Sept. 8 the moon is in conjunction with the planet Mercury, but the pairing will only be readily visible from southern latitudes. The moon will only be a day old and barely visible as a thin crescent after sunset. If you live in New York City, the sun sets at 7:15 p.m. on that day, according to Time and Date. At that time, Mercury will only be about 9 degrees above the horizon, according to the skywatching site Heavens Above. 

The conjunction of the moon and Mercury occurs at 4:18 p.m. local time in New York City, according to In-The-Sky.org — meaning that it is basically not visible due to the sun’s bright glare. However, if one lives at the latitude of Mexico City or San Juan, Puerto Rico, the situation improves. From Mexico City the conjunction happens at 3:18 p.m. local time, so it is still during the day, but as the sun sets at 7:44 p.m. Mercury will be 17 degrees above the western horizon, so as the sky gets darker, by about 8 p.m. Mexico City time, the pair will become visible. 

From the Southern Hemisphere the situation is even better: from Melbourne, Australia the conjunction occurs at 6:18 a.m local time on Sept. 9, which is well before either the moon or Mercury rises, but by sunset (which is at 6:05 p.m.) Mercury will be about 25 degrees in altitude just north of west. So some 15 minutes later the sky will be dark enough to see them both, setting at about 8:15 p.m. AEST. 

Spotting the moon so soon after the new phase is difficult, but doing so is still important for lunar calendars such as those used by observant Jews and Muslims. Be aware that pointing binoculars or a telescope to an object near the sun is very dangerous; the sun’s light is concentrated and can burn one’s retinas, even at sunset. Such damage is permanent. 

 Related: How to safely observe the sun (infographic) 

 The moon passes Venus 

Venus will shine near the bright star Spica on Sept. 5, 2021. Look for it in the western night sky. (Image credit: Starry Night)

The next conjunction will happen on Friday (Sept. 10), as the moon passes Venus. This one is much better placed for people in mid-northern latitudes. The actual conjunction happens at 1:17 a.m. EDT (0517 GMT), when both the moon and Venus are below the horizon, according to In-The-Sky.org, but they will still be quite close together in the sky that evening. Both will be in the constellation Virgo. Sunset that day is at 7:12 p.m. local time in New York City, and Venus will be about 16 degrees high in the Southwest. By about 7:30 p.m. the planet should be easy enough to see (Venus is one of the brightest objects in the sky) with the moon placed to its left and slightly above it. about 4 degrees away. 

As with the Mercury conjunction those farther south will have an easier time observing the event in the evening sky. Miami skywatchers will see the sun set at 7:30 p.m. Eastern and Venus will be 24 degrees above the horizon. In Cape Town, the conjunction occurs in the morning, at 7:17 a.m. local time, but at sunset, which is at 6:34 p.m, Venus is at 40 degrees above the west-northwestern horizon. By 6:49 p.m. when the sky is dark enough to begin seeing stars, Mercury, Spica (the brightest star in Virgo), Venus and the moon will form a rough line from the horizon going upwards and slightly to the right (north). 

The actual moment of the Venus conjunction will be visible from time zones east of Australia (or west of California); for example in Honolulu, Hawaii, the sun sets at 6:39 p.m. local time on Sept. 9, and the conjunction is 7:17 p.m. local time. At that point the moon and Venus will be about 19 degrees above the horizon. Both will set at about 8:47 p.m. local time. 

 Other planets 

On the night of Sept. 8 in mid-northern latitudes, Mars will only be a few degrees above the horizon at sunset; in New York City, for example, it will only be about 4 degrees high in the west when the sun sets at 7:19 p.m. local time, according to Heavens Above. The red planet will be more visible further south; in Buenos Aires it will be about 9 degrees in altitude at sunset (6.38 p.m. local time) — still challenging to spot. 

Jupiter and Saturn, by contrast, will be visible much of the night. For New Yorkers Saturn rises at 5:41 p.m. and Jupiter at 6:32 p.m. Eastern, so as the sky gets fully dark one will see them low in the southeast by about 9 p.m. with Saturn at about 27 degrees and Jupiter at 24 degrees. Jupiter and Saturn will be in the constellation Capricornus, with Saturn to the west (right) of Jupiter. In the Southern Hemisphere the two planets will be much higher in the sky; from Buenos Aires at 9 p.m. on Sept. 6 (local time) Saturn will be at about 67 degrees and Jupiter at 51 degrees above the horizon in the northeast.  

 Constellations 

 

September is when the autumn stars are rising as the nights get slightly longer in the Northern Hemisphere. Before midnight (about 9 p.m.), one can see the Summer Triangle (which consists of the stars Deneb, Altair and Vega) high in the east, with Sagittarius due south and just to the right of it, Scorpius — classic summer skies. 

By midnight the Summer Triangle has moved to the western half of the sky and looking due south is Capricornus, Aquarius and Pisces as one moves east (left). All three are fainter constellations, and difficult to see in brightly lit cities. The star Fomalhaut in Piscis Austrinus (the Southern Fish) is brighter; if one has a clear southern horizon it will be visible and you can use Jupiter to find it as it will be almost directly “below” the planet. 

Meanwhile, turning north, midnight means one can see the “Great Square” of Pegasus, the legendary winged horse, north of Pisces. The constellation Pegasus is brighter and usually just visible even from city locations. Only three of the four stars in the square are in Pegasus, though — the fourth is the head of Andromeda, who was saved by Perseus as he rode in on Pegasus. The star, called Alpheratz, will mark the left corner of the square at around midnight. Continuing north (left), one encounters Perseus, and then Auriga, the charioteer, rising in the eastern sky. 

In the Southern Hemisphere, by 9 p.m. on Sept. 6 the Southern Cross and Centaurus are high in the southwest. Continuing south, almost to the zenith at the latitude of Santiago, Chile, one will see Scorpius, “upside down” from the perspective of antipodeans. The Southern Fish is high in the east, and to its south (on the right) is Grus, the crane. The Crane is a “modern” constellation to Europeans, delineated based on 16th- and 17th-century observations of the southern sky by explorers, but the stars in it were familiar to Arab astronomers and the name for the brightest star, Alnair, is from Arabic. Surrounding Grus (clockwise from the bottom) are Sculptor (which is also next to the Southern Fish), Phoenix and Tucana, the toucan. 

Sculptor is faint but notable for containing the South Galactic Pole — looking in that direction means you are seeing out the “bottom” of the Milky Way galaxy. 

Phoenix is another faint constellation. Its brightest star, Ankaa, is magnitude 2.4 — roughly a tenth as bright as the star Vega — was part of a figure Arab astronomers called a dhow (a kind of boat). Tucana contains most of the Small Magellanic Cloud, a satellite galaxy of the Milky Way. 

Editor’s Note: If you snap an amazing night sky picture and would like to share it with Space.com’s readers, send your photos, comments, and your name and location to spacephotos@space.com.

You can follow Space.com on Twitter @Spacedotcom and on Facebook
 



Read original article here