Tag Archives: Sharpest

Nation’s Sharpest Opinion: Editors ‘Guilt’ of India Faces The Heat For Alleged Fake News on Manipur – Republic World

  1. Nation’s Sharpest Opinion: Editors ‘Guilt’ of India Faces The Heat For Alleged Fake News on Manipur Republic World
  2. Press freedom concerns as India editors’ body charged over Manipur report Al Jazeera English
  3. Manipur Violence: CM Biren Singh Warns Editors Guild Amid Tensions, Ground Reality Must Be Assessed The Indian Express
  4. India’s Manipur charges four journalists with misrepresenting violence in the state Reuters India
  5. Neglected child Manipur crying for help from double-engine govt that laid ‘strong foundation’ ThePrint
  6. View Full Coverage on Google News

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‘Endless Summer Vacation’: What We Learned From Miley Cyrus’ Sharpest, Most Independent Album Yet – Rolling Stone

  1. ‘Endless Summer Vacation’: What We Learned From Miley Cyrus’ Sharpest, Most Independent Album Yet Rolling Stone
  2. Why Miley Cyrus is the ultimate 21st-Century pop star BBC
  3. Miley Cyrus stays true on Endless Summer Vacation album with Flowers USA TODAY
  4. Miley Cyrus and Brandi Carlile’s Raw Duet, and 9 More New Songs The New York Times
  5. Miley Cyrus Hints at Infidelity, Brings the ‘Grime’ and ‘Glamour’ on 8th Album ‘Endless Summer Vacation’: Lyric Breakdown Us Weekly
  6. View Full Coverage on Google News

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Brayden Lape Calls Out Gwen Stefani in One of the Sharpest Barbs of ‘The Voice’ Season!

“I thought that was a good opportunity to mess around with her a little bit,” Brayden said.

For his first song of two on the season 22 The Voice finale, Team Blake Shelton’s Brayden Lape performed “Humble and Kind” by Tim McGraw, which he dedicated to his hometown who he explained had supported him all his life. Keep in mind, he’s only 16.

Then it was time to critique his performance and coach Gwen Stefani started to say, “I was thinking what would I say because I was thinking I was your No. 1 fan on the show.”

Related: The Voice’s Top 16 Artist Bodie Reveals Why He Chose Blake Shelton Over Gwen Stefani As His Coach

When she paused for a second, Brayden, who was a one-chair turn, interrupted her to ask, “Then why didn’t you turn?”

A flustered Gwen said, “What are you talking about? I don’t know. I can’t remember that far back, but I will say this. I always believed in you since the beginning that you had something special. Even outside of your voice. It’s just this thing that I can’t put my finger on, but I was right. Look, you’re in the finals.”

After the show, Parade got a chance to talk to Brayden to ask him what he was thinking when he confronted Gwen.

He explained, “After the show last week, one of my friends reached out to me and told me that I should have said that at one point. So, this week, I was just waiting until she was, ‘I’m such a big fan,’ and then I could mess around with her. I like to have a good time up there and mess around with everyone. I thought that was a good opportunity to mess around with her a little bit.”

Related: Morgan Myles on Why She Almost Couldn’t Finish the Emotional Lady Gaga Song That Got Her to The Voice Finale

Then Brayden went on in a humbler manner. “It’s been an awesome journey so far. I couldn’t be more thankful for everything, but you’ve got to have fun sometimes.”

But how did he know she had a sense of humor?

His explanation was, “If she’s liking Blake, she does.”

A perfect example of what he meant by that is that before his performance in his clip package, Blake had been messing with Brayden and tightened his microphone stand so tight that Brayden couldn’t adjust it to his height. He’s 6 feet tall, and Blake had lowered the mic, so it was the right height for a child—and Brayden got that his coach was messing with him. So, he probably felt turnaround was fair play, only he did it with Blake’s wife.

For his second and final competitive performance on The Voice, Brayden performed “Wild as Her” by Cory Kent.

The winner of The Voice will be announced on Tuesday night at the end of the two-hour special, which will include guest appearances by Kane Brown, Karol G, Kelly Clarkson, Maluma, One Republic, Adam Lambert, BRELAND, and last year’s winner, Girl Named Tom, and will start at 9 p.m. ET/PT on NBC.

Next, Who Will Win The Voice Season 22? After Watching Every Episode, Here Are Our Predictions

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NASA’s Webb Telescope Takes Sharpest ‘Pillars of Creation’ Portrait Ever

NASA’s most eagle-eyed observatory yet has done it again. The James Webb Space Telescope has returned an image of the famous “Pillars of Creation” in infrared light that’s the sharpest, most detailed portrait of the spectacular star-forming region ever seen.

The ethereal scene captures translucent columns of cool interstellar gas and dust punctuated by piercing, bright points of light. Most of these are stars, and the reddish balls of fire near the edges of the pillars are newly formed stars, according to NASA.  

Don’t confuse these with the deep red, magma-like areas along the inside perimeter of a few of the pillars. This is created by the turmoil of stars that are still forming and shooting supersonic jets of material out into space where they collide with other material. In short, this is what cosmic chaos looks like. 

Fortunately these epic explosions and cosmological collisions are far away, at a distance of around 6,500 light-years from Earth. 

This region of the universe first achieved fame in 1995 when it was imaged by NASA’s Hubble Space Telescope. A follow-up campaign was done by Hubble in 2014, and plenty of other observatories have also trained their lenses on the area that lies within the Eagle Nebula. 

A 2014 image taken by the Hubble Space Telescope on the left, alongside the new image from the Webb telescope. 


NASA/ESA/CSA/STScI/Hubble Heritage Project/Joseph DePasquale/Anton M. Koekemoer/Alyssa Pagan

A side-by-side comparison of the new image and Hubble’s take on the cosmic phenomenon reveals how Webb’s infrared instrument is able to peer through the curtains of dust and gas that shroud the scene. 

NASA and astronomers around the world will be looking to images like these and more data from Webb to glean a better understanding of the process of star formation.

For the rest of us, it’s some appealing eye candy just in time for Halloween. 

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NASA’s Webb Telescope Captures Sharpest ‘Pillars of Creation’ Portrait Ever

NASA’s most eagle-eyed observatory so far has done it again. The James Webb Space Telescope has returned an image of the famous “Pillars of Creation” in infrared light that’s the sharpest, most detailed portrait of the spectacular star-forming region ever seen.

The ethereal scene captures translucent columns of cool interstellar gas and dust punctuated by piercing, bright points of light. Most of these are stars, and the reddish balls of fire near the edges of the pillars are newly formed stars, according to NASA.  

Don’t confuse these with the deep red, magma-like areas along the inside perimeter of a few of the pillars. This is created by the turmoil of stars that are still forming and shooting supersonic jets of material out into space where they collide with other material. In short, this is what cosmic chaos looks like. 

Fortunately these epic explosions and cosmological collisions are far away, at a distance of around 6,500 light-years from Earth. 

This region of the universe first achieved fame in 1995 when it was imaged by NASA’s Hubble Space Telescope. A follow-up campaign was done by Hubble in 2014, and plenty of other observatories have also trained their lenses on the area that lies within the Eagle Nebula. 

A 2014 image taken by the Hubble Space Telescope on the left, alongside the new image from the Webb telescope. 


NASA/ESA/CSA/STScI/Hubble Heritage Project/Joseph DePasquale/Anton M. Koekemoer/Alyssa Pagan

A side-by-side comparison of the new image and Hubble’s take on the cosmic phenomenon reveals how Webb’s infrared instrument is able to peer through the curtains of dust and gas that shroud the scene. 

NASA and astronomers around the world will be looking to images like these and more data from Webb to glean a better understanding of the process of star formation.

For the rest of us, it’s some appealing eye candy just in time for Halloween. 

Read original article here

NASA’s Webb Telescope Captures Sharpest ‘Pillars of Creation’ Portrait Yet

NASA’s most eagle-eyed observatory yet has done it again. The James Webb Space Telescope has returned an image of the famous “Pillars of Creation” in infrared light that’s the sharpest, most detailed portrait of the spectacular star-forming region ever seen.

The ethereal scene captures translucent columns of cool interstellar gas and dust punctuated by piercing, bright points of light. Most of these are stars, and the reddish balls of fire near the edges of the pillars are newly formed stars, according to NASA.  

Don’t confuse these with the deep red, magma-like areas along the inside perimeter of a few of the pillars. This is created by the turmoil of stars that are still forming and shooting supersonic jets of material out into space where they collide with other material. In short, this is what cosmic chaos looks like. 

Fortunately these epic explosions and cosmological collisions are far away, at a distance of around 6,500 light-years from Earth. 

This region of the universe first achieved fame in 1995 when it was imaged by NASA’s Hubble Space Telescope. A follow-up campaign was done by Hubble in 2014, and plenty of other observatories have also trained their lenses on the area that lies within the Eagle Nebula. 

A 2014 image taken by the Hubble Space Telescope on the left, alongside the new image from the Webb telescope. 


NASA/ESA/CSA/STScI/Hubble Heritage Project/Joseph DePasquale/Anton M. Koekemoer/Alyssa Pagan

A side-by-side comparison of the new image and Hubble’s take on the cosmic phenomenon reveals how Webb’s infrared instrument is able to peer through the curtains of dust and gas that shroud the scene. 

NASA and astronomers around the world will be looking to images like these and more data from Webb to glean a better understanding of the process of star formation.

For the rest of us, it’s some appealing eye candy just in time for Halloween. 

Read original article here

Sharpest Earth-Based Images of Jupiter’s Moons Europa and Ganymede Reveal Their Icy Landscape

Jupiter’s moon Europa captured by ESO’s Very Large Telescope (VLT). Credit: ESO/King & Fletcher

The most detailed images ever taken of two of

Europa is named for a woman who, in Greek mythology, was abducted by the god Zeus – Jupiter in Roman mythology. It may be the most promising place in our solar system to find present-day environments suitable for some form of life beyond Earth. With an equatorial diameter of 1,940 miles, Europa is about 90 percent the size of Earth’s Moon. It orbits Jupiter every 3.5 days.

As some of the sharpest images of Jupiter’s moons ever acquired from a ground-based observatory, they reveal new insights into the processes shaping the chemical composition of these massive moons – including geological features such as the long rift-like linae cutting across Europa’s surface.

Ganymede and Europa are two of the four largest moons orbiting Jupiter, a quartet known as the Galilean satellites. While Europa is quite similar in size to our own Moon, Ganymede is the largest moon in the entire Solar System.

The Leicester team, led by PhD student Oliver King, used the European Southern Observatory’s

The new observations recorded the amount of sunlight reflected from Europa and Ganymede’s surfaces at different infrared wavelengths, producing a reflectance spectrum. These reflectance spectra are analyzed by developing a computer model that compares each observed spectrum to spectra of different substances that have been measured in laboratories.

The images and spectra of Europa, published in the Planetary Science Journal, reveal that Europa’s crust is mainly composed of frozen water ice with non-ice materials contaminating the surface.

Jupiter’s moon Ganymede captured by ESO’s Very Large Telescope (VLT). Credit: ESO/King & Fletcher

Oliver King from the University of Leicester School of Physics and Astronomy said: “We mapped the distributions of the different materials on the surface, including sulphuric

“The modeling found that there could be a variety of different salts present on the surface, but suggested that infrared spectroscopy alone is generally unable to identify which specific types of salt are present.”

Ganymede is not only Jupiter’s largest moon, but the largest moon in our solar system. In fact, it is bigger than the planet Mercury and the dwarf planet

Oliver King adds: “This has allowed us to carry out detailed mapping of Europa and Ganymede, observing features on their surfaces smaller than 150 km across – all at distances over 600 million kilometers from the Earth. Mapping at this fine scale was previously only possible by sending spacecraft all the way to Jupiter to observe the moons up-close.”

Professor Leigh Fletcher, who supervised the VLT study, is a member of the science teams for ESA’s Jupiter Icy Moons Explorer (JUICE) and NASA’s Europa Clipper mission, which will explore Ganymede and Europa up close in the early 2030s. JUICE is scheduled to launch in 2023, and University of Leicester scientists play key roles in its proposed study of Jupiter’s atmosphere, magnetosphere, and moons.

Professor Fletcher said: “These ground-based observations whet the appetite for our future exploration of Jupiter’s moons.”

“Planetary missions operate under tough operating constraints and we simply can’t cover all the terrain that we’d like to, so difficult decisions must be taken about which areas of the moons’ surfaces deserve the closest scrutiny. Observations at 150-km scale such as those provided by the VLT, and ultimately its enormous successor the ELT (Extremely Large Telescope), help to provide a global context for the spacecraft observations.”

References:

“Global Modelling of Ganymede’s Surface Composition: Near-IR Mapping from VLT/SPHERE” by Oliver King and Leigh N. Fletcher, Accepted, JGR: Planets.
arXiv:2209.01976

“Compositional mapping of Europa using MCMC modelling of Near-IR VLT/SPHERE and Galileo/NIMS observations” by Oliver King, Leigh N. Fletcher and Nicolas Ligier (2022), 31 March 2022, Planetary Science Journal.
DOI: 10.3847/PSJ/ac596d

This work was funded by a Royal Society Enhancement Award number 180071 to Professor Leigh Fletcher in the School of Physics and Astronomy, entitled “The diversity of Jupiter’s Galilean moons: Earth-based pathfinder observations in preparation for JUICE.”



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Sharpest Earth-based images of Europa and Ganymede reveal their icy landscapes

Europa. Credit:ESO/King & Fletcher

The cocktail of chemicals that make up the frozen surfaces on two of Jupiter’s largest moons are revealed in the most detailed images ever taken of them by a telescope on Earth.

Planetary scientists from the University of Leicester’s School of Physics and Astronomy have unveiled new images of Europa and Ganymede, two future destinations for exciting new missions to the Jovian system.

Some of the sharpest images of Jupiter’s moons ever acquired from a ground-based observatory, they reveal new insights into the processes shaping the chemical composition of these massive moons—including geological features such as the long rift-like linae cutting across Europa’s surface.

Ganymede and Europa are two of the four largest moons orbiting Jupiter, known as the Galilean moons. Whilst Europa is quite similar in size to our own Moon, Ganymede is the largest moon in the whole Solar System.

The Leicester team, led by Ph.D. student Oliver King, used the European Southern Observatory’s Very Large Telescope (VLT) in Chile to observe and map the surfaces of these two worlds.

The new observations recorded the amount sunlight reflected from Europa and Ganymede’s surfaces at different infrared wavelengths, producing a reflectance spectrum. These reflectance spectra are analyzed by developing a computer model that compares each observed spectrum to spectra of different substances that have been measured in laboratories.

The images and spectra of Europa, published in the Planetary Science Journal, reveal that Europa’s crust is mainly composed of frozen water ice with non-ice materials contaminating the surface.

Oliver King from the University of Leicester School of Physics and Astronomy says that they “mapped the distributions of the different materials on the surface, including sulfuric acid frost which is mainly found on the side of Europa that is most heavily bombarded by the gases surrounding Jupiter.”

Ganymede. Credit: ESO/King & Fletcher

“The modeling found that there could be a variety of different salts present on the surface, but suggested that infrared spectroscopy alone is generally unable to identify which specific types of salt are present.”

The observations of Ganymede, published in the journal JGR: Planets, show how the surface is made up to two main types of terrain: young areas with large amounts of water ice, and ancient areas mainly consisting of a dark gray material, the composition of which is unknown.

The icy areas (blue in the images) include Ganymede’s polar caps and craters—where an impact event has exposed the fresh clean ice of Ganymede’s crust. The team mapped how the size of the grains of ice on Ganymede varies across the surface and the possible distributions of a variety of different salts, some of which may originate from within Ganymede itself.

Located at high altitude in northern Chile, and with mirrors over 8 meters across, the Very Large Telescope is one of the most powerful telescope facilities in the world.

Oliver King adds that “this has allowed us to carry out detailed mapping of Europa and Ganymede, observing features on their surfaces smaller than 150 km across—all at distances over 600 million kilometers from the Earth. Mapping at this fine scale was previously only possible by sending spacecraft all the way to Jupiter to observe the moons up-close.”

Professor Leigh Fletcher, who supervised the VLT study, is a member of the science teams for ESA’s Jupiter Icy Moons Explorer (JUICE) and NASA’s Europa Clipper mission, which will explore Ganymede and Europa up close in the early 2030s. JUICE is scheduled to launch in 2023, and University of Leicester scientists play key roles in its proposed study of Jupiter’s atmosphere, magnetosphere, and moons.

Professor Fletcher says that “these ground-based observations whet the appetite for our future exploration of Jupiter’s moons.”

“Planetary missions operate under tough operating constraints and we simply can’t cover all the terrain that we’d like to, so difficult decisions must be taken about which areas of the moons’ surfaces deserve the closest scrutiny. Observations at 150-km scale such as those provided by the VLT, and ultimately its enormous successor the ELT (Extremely Large Telescope), help to provide a global context for the spacecraft observations.”


Hubble finds evidence of persistent water vapor in one hemisphere of Europa


More information:
Oliver King et al, Compositional Mapping of Europa Using MCMC Modeling of Near-IR VLT/SPHERE and Galileo/NIMS Observations, The Planetary Science Journal (2022). DOI: 10.3847/PSJ/ac596d

Oliver King et al, Global Modeling of Ganymede’s Surface Composition: Near-IR Mapping from VLT/SPHERE, JGR: Planets (2022). doi.org/10.1029/2022JE007323

Provided by
University of Leicester

Citation:
Sharpest Earth-based images of Europa and Ganymede reveal their icy landscapes (2022, October 10)
retrieved 11 October 2022
from https://phys.org/news/2022-10-sharpest-earth-based-images-europa-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.



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Housing market records sharpest decline in sales in almost two decades: report

New data indicates that the housing market is seeing its most severe drop in almost two decades as home sales hit their lowest level in seven years. 

Existing Home Sales data showed a drop of 5.9% from June to July and a 20.2% drop from the same period one year earlier, marking the sixth consecutive month of decline. The median price of a house rose 10.8% from one year prior to a price of $403,800, but it’s still down $10,000 from the previous month’s high, according to the National Association of Realtors. 

These drops occurred despite the inventory of unsold houses rising to 1.31 million by the end of July. 

“The ongoing sales decline reflects the impact of the mortgage rate peak of 6% in early June,” said NAR Chief Economist Lawrence Yun. “Home sales may soon stabilize since mortgage rates have fallen to near 5%, thereby giving an additional boost of purchasing power to home buyers.” 

REAL ESTATE PRICES ‘COOLING,’ BUT ‘NOT A FIRE SALE’: EXPERT

“We’re witnessing a housing recession in terms of declining home sales and home building,” Yun added. “However, it’s not a recession in home prices. Inventory remains tight and prices continue to rise nationally with nearly 40% of homes still commanding the full list price.”

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CSTR CAPSTAR FINANCIAL HOLDINGS INC 21.67 -0.31 -1.41%

The rise in mortgage rates has helped to rapidly cool what had been a red-hot housing market, hitting a record high in median home prices. The Federal Reserve boosted the rate in an effort to contain rampant inflation.

REAL ESTATE EXPERT ADVISES PROSPECTIVE HOME BUYERS NOT TO JUST LOOK AT 30-YEAR FIXED MORTGAGE RATE

The six-month decline marks perhaps the fastest drop off since 2005, according to Seeking Alpha. 

The average seasonally adjusted rate of home sales over the past decade hovered around 5.35 million, but the current level is at around 4.81 million, down from 6.50 million in half a year. Only the first year of the pandemic shows a more severe decline in home sales. 

A For Sale sign is posted in front of a property in Monterey Park, California on August 16, 2022. – The US housing market is declining amid higher interest rates with fewer starts and more cancelled deals. (Photo by FREDERIC J. BROWN/AFP via Getty Images / Getty Images)

The previous non-pandemic rate to hit a similar cliff dive occurred in 2005 after the housing bubble peaked. The following decline occurred over nine months from 2006 into 2007 and rolled into the housing crisis of 2008. 

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And the Conference Board posted an annual rate of change in its Leading Economic Index of 0%. Seeking Alpha noted that should the rate enter negative territory, it would be the 13th time since 1960, and 66% of those previous instances preceded a recession. 

FOX Business’ Megan Henney contributed to this report

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Sharpest image ever of universe’s most massive known star

Nestled in the center of the Tarantula Nebula in the Large Magellanic Cloud is the largest star yet discovered. With the help of the Zorro imager and the power of the 8.1-meter Gemini South telescope in Chile, astronomers have produced the sharpest image ever of this star. This new image challenges our understanding of the most massive stars and suggests that they may not be as massive as previously thought. Credit: International Gemini Observatory/NOIRLab/NSF/AURAAcknowledgment: Image processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab)

By harnessing the capabilities of the 8.1-meter Gemini South telescope in Chile, which is part of the International Gemini Observatory operated by NSF’s NOIRLab, astronomers have obtained the sharpest image ever of the star R136a1, the most massive known star in the universe. Their research, led by NOIRLab astronomer Venu M. Kalari, challenges our understanding of the most massive stars and suggests that they may not be as massive as previously thought.

Astronomers have yet to fully understand how the most massive stars—those more than 100 times the mass of the sun—are formed. One particularly challenging piece of this puzzle is obtaining observations of these giants, which typically dwell in the densely populated hearts of dust-shrouded star clusters. Giant stars also live fast and die young, burning through their fuel reserves in only a few million years. In comparison, our sun is less than halfway through its 10 billion year lifespan. The combination of densely packed stars, relatively short lifetimes, and vast astronomical distances makes distinguishing individual massive stars in clusters a daunting technical challenge.

By pushing the capabilities of the Zorro instrument on the Gemini South telescope of the International Gemini Observatory, operated by NSF’s NOIRLab, astronomers have obtained the sharpest-ever image of R136a1—the most massive known star. This colossal star is a member of the R136 star cluster, which lies about 160,000 light-years from Earth in the center of the Tarantula Nebula in the Large Magellanic Cloud, a dwarf companion galaxy of the Milky Way.

Previous observations suggested that R136a1 had a mass somewhere between 250 to 320 times the mass of the sun. The new Zorro observations, however, indicate that this giant star may be only 170 to 230 times the mass of the sun. Even with this lower estimate, R136a1 still qualifies as the most massive known star.

This comparison image shows the exceptional sharpness and clarity of the Zorro imager on the 8.1-meter Gemini South telescope in Chile (left) when compared to an earlier image taken with the NASA/ESA Hubble Space Telescope (right). The new Gemini South image allowed astronomers to clearly distinguish the star R136a1 from its nearby stellar companions, providing the data needed to reveal that – while still the most massive star known in the Universe – it is less massive than previously thought. Credit: International Gemini Observatory/NOIRLab/NSF/AURAAcknowledgment: Image processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab); NASA/ESA Hubble Space Telescope

Astronomers are able to estimate a star’s mass by comparing its observed brightness and temperature with theoretical predictions. The sharper Zorro image allowed NSF’s NOIRLab astronomer Venu M. Kalari and his colleagues to more accurately separated the brightness of R136a1 from its nearby stellar companions, which led to a lower estimate of its brightness and therefore its mass.

“Our results show us that the most massive star we currently know is not as massive as we had previously thought,” explained Kalari, lead author of the paper published in The Astrophysical Journal. “This suggests that the upper limit on stellar masses may also be smaller than previously thought.”

This result also has implications for the origin of elements heavier than helium in the universe. These elements are created during the cataclysmically explosive death of stars more than 150 times the mass of the sun in events that astronomers refer to as pair-instability supernovae. If R136a1 is less massive than previously thought, the same could be true of other massive stars and consequently pair instability supernovae may be rarer than expected.

The star cluster hosting R136a1 has previously been observed by astronomers using the NASA/ESA Hubble Space Telescope and a variety of ground-based telescopes, but none of these telescopes could obtain images sharp enough to pick out all the individual stellar members of the nearby cluster.

This is an illustration of R136a1, the largest known star in the Universe, which resides inside the Tarantula Nebula in the Large Magellanic Cloud. By harnessing the capabilities of the 8.1-meter Gemini South telescope in Chile, a team of astronomers has obtained the sharpest image ever of this colossal star. Credit: NOIRLab/NSF/AURA/J. da Silva/Spaceengine

Gemini South’s Zorro instrument was able to surpass the resolution of previous observations by using a technique known as speckle imaging, which enables ground-based telescopes to overcome much of the blurring effect of Earth’s atmosphere. By taking many thousands of short-exposure images of a bright object and carefully processing the data, it is possible to cancel out almost all this blurring. This approach, as well as the use of adaptive optics, can dramatically increase the resolution of ground-based telescopes, as shown by the team’s sharp new Zorro observations of R136a1.

“This result shows that given the right conditions an 8.1-meter telescope pushed to its limits can rival not only the Hubble Space Telescope when it comes to angular resolution, but also the James Webb Space Telescope,” commented Ricardo Salinas, a co-author of this paper and the instrument scientist for Zorro. “This observation pushes the boundary of what is considered possible using speckle imaging.”

“We began this work as an exploratory observation to see how well Zorro could observe this type of object,” said Kalari. “While we urge caution when interpreting our results, our observations indicate that the most massive stars may not be as massive as once thought.”

Zorro and its twin instrument ‘Alopeke are identical imagers mounted on the Gemini South and Gemini North telescopes, respectively. Their names are the Hawaiian and Spanish words for “fox” and represent the telescopes’ respective locations on Maunakea in Hawai’i and on Cerro Pachón in Chile. These instruments are part of the Gemini Observatory’s Visiting Instrument Program, which enables new science by accommodating innovative instruments and enabling exciting research. Steve B. Howell, current chair of the Gemini Observatory Board and senior research scientist at the NASA Ames Research Center in Mountain View, California, is the principal investigator on both instruments.

“Gemini South continues to enhance our understanding of the universe, transforming astronomy as we know it. This discovery is yet another example of the scientific feats we can accomplish when we combine international collaboration, world-class infrastructure, and a stellar team,” said NSF Gemini Program Officer Martin Still.


Astronomers obtain new images of R136, the most massive star ever found


More information:
Resolving the core of R136 in the optical, The Astrophysical Journal (2022). DOI: 10.3847/1538-4357/ac8424

Provided by
Association of Universities for Research in Astronomy (AURA)

Citation:
Sharpest image ever of universe’s most massive known star (2022, August 19)
retrieved 19 August 2022
from https://phys.org/news/2022-08-sharpest-image-universe-massive-star.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.



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