Tag Archives: laser

Intriguing ‘Shark With Frickin’ Laser Beam’ Art Appears On Exotic Test Jet

One of the two Scaled Composites stealthy Model 401 “Son of Ares” jets was spotted recently landing at the Mojave Air and Space Port fitted with a still curious, but now familiar ventral pod installed under the forward section of the fuselage. A whimsical depiction of a shark with what appears to be a laser strapped to its head – a reference to a well-known scene from the 1997 Mike Myers spy comedy Austin Powers – indicates it is related to a directed energy system of some kind. This is exactly what The War Zone, which was the first to report on this modification nearly two years ago to the date, had previously posited, as you can read more about here.

@Task_Force23

Twitter user @Task_Force23 grabbed the shots of the aircraft, which has the U.S. civil registration number N401XP and was using the callsign “Scat 71” at the time, on October 16 and was kind enough to share them with us. An L-39 Albatros jet trainer belonging to Gauntlet Aerospace, with the N-number N25PX, was observed flying close to N401XP likely acting as a chase plane or as part of a test itself.

N25PX, at bottom right, flying close to N401XP on October 16. @Task_Force23
A clearer look at N25PX. @Task_Force23

The most immediately eye-catching addition to the N401XP is the “sharks with freakin’ laser beams attached their heads” artwork on the ventral pod. Scaled Composites, a famous cutting-edge aerospace design company that is currently a subsidiary of Northrop Grumman, is well-known for adding tongue-in-cheek markings to their aircraft.

@Task_Force23

The art on N401XP’s ventral pod is undoubtedly a reference to the scene in the clip below from the 1997 film Austin Powers.

In fact, the ‘Son of Ares’ moniker for these jets – which are also nicknamed Phobos and Deimos, the sons of Ares, the god of war, in Greek mythology – is a reference to Scaled Composites’ earlier experimental Agile Responsive Effective Support (ARES) jet that was confirmed by a “World’s Greatest Dad” graphic that was spotted on the older aircraft in 2018, as you can read more about here. At various points, the ARES jet, which Scaled Composites continues to use for testing purposes, has also been seen with a “Chemtrail Tank” label poking fun at that conspiracy theory and a satellite communications dome on top of the fuselage painted to look like R2-D2, the fan-favorite droid from the Star Wars franchise.

The pod seen yesterday on N401XP looks more or less unchanged from when it was first spotted on that aircraft in October 2020. It still features a wide intake link front, two small aerials, one black and one white, underneath it and a large exhaust pipe at the rear, which is angled downward.

In addition, to the laser shark motif painted on the side, there is now also a warning label that reads “JET BLAST – DANGER” with an arrow pointing to the exhaust nozzle. This suggested that the exhaust system is attached to an auxiliary power unit (APU) of some kind, but there are other possibilities, as well.

Though the new pictures we have of N401XP from October 16 don’t provide a clear look at the right side of the pod, an underside view clearly shows that an aperture that was present two years ago is still there, as well.

A look at the underside of N401XP on October 16. @Task_Force23

N401XP otherwise looks to be largely in the same configuration, at least externally that it did two years ago, including a prominent ‘hump’ or ‘bulge’ underneath the fuselage right behind the ventral pod. The aircraft has notably gained two additional antennas on either side of the underside of the nose. At least one of those new antennas, along with another that was seen on the aircraft in 2020, is attached to a clearly demarcated section of the nose.

A close-up view of N401XP’s nose showing two new antennas, to the right and left, as well as a small white one that had been seen fitted previously. @Task_Force23
From the side, it’s not entirely clear if the new antenna on the right side of the nose is attached to the visibly ‘sectioned’ portion of the nose or not, but the one on the left clearly is. @Task_Force23

It’s not clear from the pictures we have from two years ago if this ‘sectioned’ nose was present on the jet then, too.

N401XP seen fitted with the ventral pod in October 2020. Steve Lee

Beyond the now clear connection of some kind to a laser directed energy system, how specifically the ventral pod is designed to work remains unclear. The pod could potentially contain a laser itself – although it’s not clear where the emitter might go. A likely possibility is that the laser could be directed out of the aperture on the right side. The pod and what is buried in the aircraft’s bays overhead could hold an APU used to independently power the laser. So this would be a configuration in which the air intake is at the front, the exhaust is downward out the rear, and possibly an emitter that fires out the side, with APU being buried in the bay above. This would be a remarkably compact and intriguing installation, although just how the high thermal loads that high-power lasers are associated with would be managed isn’t clear.

Model 401s flying together over Mojave. (Scaled Composites)

Then again, we could just be seeing components tied to a tertiary emitter system that is planned to be installed elsewhere in the aircraft, too, such as where the pilot is now in an unmanned variant (hence and even more direct Dr. Evil ‘sharks with lasers on their head’ callback). The jet may not actually ever carry the laser itself, either, with the artwork on the pod simply being a reference to the plane’s use in some way in support of laser-related research work. Although this seems less likely due to the highly customized installation we are seeing now two years after it first appeared. And such a laser could even be sensor-related, not a laser weapon to swat-down hostile targets, for instance.

The two Scaled Composites Model 401s themselves were first developed to demonstrate various advanced, rapid, and low-cost design and manufacturing techniques as well as act as demonstrator support aircraft for undisclosed programs. They have since been employed for various testing purposes. In this role, the aircraft are regularly seen reconfigured for different tasks and have often been seen on flight tracking applications working in concert with the company’s high-flying Proteus testbed jet.

“Following initial performance envelope expansion, both aircraft conduct payload development testing for a wide variety of customers,” according to Scaled Composites’ website. “The aircraft are able to incorporate a diverse range of payload systems with over 80 cubic feet of internal payload volume and up to 2,000 pounds of payload weight capacity.”

To date, it’s unclear whether or not Northrop Grumman may be planning to market the Model 401, or variants or derivatives thereof, for general sale in any configuration. However, it seems very likely that this could be the case given that last year the company showed reporters a mockup of an unmanned version – it’s not clear if this simply reflected the pilotless configuration of the standard design or a new drone variant – as well as an entirely new drone derivative, known as the Model 437. You can read more about these developments here.

Artwork depicting the Model 437 design, at center, as well as a drone version of the Model 401 in the upper lefthand corner, among other crewed and uncrewed aircraft. Northrop Grumman/Scaled Composites via Steve Trimble/Aviation Week

The Model 401 has features that could be very beneficial for the employment of a laser of some kind. Its high dihedral wings would offer any such payload installed underneath the fuselage a greater than horizon-to-horizon horizon field of view without having to bank.

The aircraft’s underlying design is good for being able to loiter in a particular area at low speeds for extended periods of time, while also being able to make transits to and from a specific point at higher jet speeds. An uncrewed configuration would eliminate any mission duration limitations that a human pilot might impose, as well as potentially offer other unique capabilities to the overall mix.

There are definitely various laser and potentially laser-related development efforts that N401XP could be flying in support of in this configuration with the underbelly pod. Despite encountering hurdles over the years, the U.S. Air Force, in particular, has a number of active programs focused on developing aircraft-mounted lasers for use as offensive and defensive weapons.

Artwork depicting an F-16 with the podded Self-protect High Energy Laser Demonstrator (SHiELD) laser directed energy weapon. Lockheed Martin

There is, of course, still no confirmed connection between N401XP in the configuration with the ventral pod and either of these programs, or any other aerial directed energy weapon efforts.

As The War Zone noted in 2020, whatever the purpose of the laser system fitted to N401XP might be, it could also be related to work on capabilities to protect against such directed energy weapons. Not long ago, one of the Son of Ares jets had been spotted with a mirror-like coating. Mirror-like finishes have now appeared in multiple forms on stealthy Air Force F-22 Raptors, F-35A Joint Strike Fighters, and F-117A Nighthawks, as well as U.S. Navy F-35Cs – all belong to these services’ test and evaluation communities – as you can read more about here.

It is possible that the ventral pod seen on N401XP has to do with something completely different, too. And yes, it could be a misdirection or even a reference to our past article, although that seems very unlikely. Still, at least when taken at face value, the podded addition to the jet’s underside is even more likely to have something to do with lasers now than before.

As time goes on, the Model 401s will likely prove more pivotal to the future of air combat than most would have expected and they could even spawn production aircraft, laser-equipped or not.

Contact the author: joe@thedrive.com



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Physicists Say They’ve Built an Atom Laser That Can Run ‘Forever’

A new breakthrough has allowed physicists to create a beam of atoms that behaves the same way as a laser, and that can theoretically stay on “forever”.

This might finally mean the technology is on its way to practical application, although significant limitations still apply.

 

Nevertheless, this is a huge step forward for what is known as an “atom laser” – a beam made of atoms marching as a single wave that could one day be used for testing fundamental physical constants, and engineering precision technology.

Atom lasers have been around for a minute. The first atom laser was created by a team of MIT physicists back in 1996. The concept sounds pretty simple: just as a traditional light-based laser consists of photons moving with their waves in sync, a laser made of atoms would require their own wave-like nature to align before being shuffled out as a beam.

As with many things in science, however, it is easier to conceptualize than to realize. At the root of the atom laser is a state of matter called a Bose-Einstein condensate, or BEC.

A BEC is created by cooling a cloud of bosons to just a fraction above absolute zero. At such low temperatures, the atoms sink to their lowest possible energy state without stopping completely.

When they reach these low energies, the particles’ quantum properties can no longer interfere with each other; they move close enough to each other to sort of overlap, resulting in a high-density cloud of atoms that behaves like one ‘super atom’ or matter wave.

 

However, BECs are something of a paradox. They’re very fragile; even light can destroy a BEC. Given that the atoms in a BEC are cooled using optical lasers, this usually means that a BEC’s existence is fleeting.

Atom lasers that scientists have managed to achieve to date have been of the pulsed, rather than continuous variety; and involve firing off just one pulse before a new BEC needs to be generated.

In order to create a continuous BEC, a team of researchers at the University of Amsterdam in the Netherlands realized something needed to change.

“In previous experiments, the gradual cooling of atoms was all done in one place. In our setup, we decided to spread the cooling steps not over time, but in space: we make the atoms move while they progress through consecutive cooling steps,” explained physicist Florian Schreck.

“In the end, ultracold atoms arrive at the heart of the experiment, where they can be used to form coherent matter waves in a BEC. But while these atoms are being used, new atoms are already on their way to replenish the BEC. In this way, we can keep the process going – essentially forever.”

 

That ‘heart of the experiment’ is a trap that keeps the BEC shielded from light, a reservoir that can be continuously replenished for as long as the experiment runs.

Protecting the BEC from the light produced by the cooling laser, however, while simple in theory, was again a bit more difficult in practice. Not only were there technical hurdles, but there were also bureaucratic and administrative ones too.

“On moving to Amsterdam in 2013, we began with a leap of faith, borrowed funds, an empty room, and a team entirely funded by personal grants,” said physicist Chun-Chia Chen, who led the research.

“Six years later, in the early hours of Christmas morning 2019, the experiment was finally on the verge of working. We had the idea of adding an extra laser beam to solve a last technical difficulty, and instantly every image we took showed a BEC, the first continuous-wave BEC.”

Now that the first part of the continuous atom laser has been realized – the “continuous atom” part – the next step, the team said, is working on maintaining a stable atom beam. They could achieve this by transferring the atoms to an untrapped state, thereby extracting a propagating matter wave.

Because they used strontium atoms, a popular choice for BECs, the prospect opens exciting opportunities, they said. Atom interferometry using strontium BECs, for example, could be used to conduct investigations of relativity and quantum mechanics, or detect gravitational waves.

“Our experiment is the matter wave analogue of a continuous-wave optical laser with fully reflective cavity mirrors,” the researchers wrote in their paper. 

“This proof-of-principle demonstration provides a new, hitherto missing piece of atom optics, enabling the construction of continuous coherent-matter-wave devices.”

The research has been published in Nature.

 

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Physicists Build Atom Laser That Can Stay On Forever

University of Amsterdam physicists build an atom laser that can stay on forever. Credit: UvA

These days, imagining our everyday life without lasers is difficult. Lasers are used in printers, CD players, measuring devices, pointers, and so on.

What makes lasers so special is that they use coherent waves of light: all the light inside a laser vibrates completely in sync. Meanwhile, quantum mechanics tells us that particles like atoms should also be thought of as waves. As a result, we can build ‘

The central part of the experiment in which the coherent matter waves are created. Fresh atoms (blue) fall in and make their way to the Bose-Einstein Condensate in the center. In reality, the atoms are not visible to the naked eye. Image processing by Scixel. Credit: UvA

In everyday life, we are not at all familiar with these condensates. The reason: it is very difficult to get atoms to all behave as one. The culprit destroying the synchronicity is temperature: when a substance heats up, the constituent particles start to jiggle around, and it becomes virtually impossible to get them to behave as one. Only at extremely low temperatures, about a millionth of a degree above

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Physicists build an atom laser that can stay on forever

The central part of the experiment in which the coherent matter waves are created. Fresh atoms (blue) fall in and make their way to the Bose-Einstein Condensate in the center. In reality, the atoms are not visible to the naked eye. Credit: Scixel.

Lasers produce coherent waves of light: All the light inside a laser vibrates completely in sync. Meanwhile, quantum mechanics tells us that particles like atoms should also be thought of as waves. As a result, we can build “atom lasers” containing coherent waves of matter. But can we make these matter waves last, so that they may be used in applications? In research that was published in Nature this week, a team of Amsterdam physicists shows that the answer to this question is affirmative.

Getting bosons to march in sync

The concept that underlies the atom laser is the so-called Bose-Einstein Condensate, or BEC for short. Elementary particles in nature occur in two types: fermions and bosons. Fermions are particles like electrons and quarks—the building blocks of the matter that we are made of. Bosons are very different in nature: they are not hard like fermions, but soft: for example, they can move through one another without a problem. The best-known example of a boson is the photon, the smallest possible quantity of light. But matter particles can also combine to form bosons—in fact, entire atoms can behave just like particles of light. What makes bosons so special is that they can all be in the exact same state at the exact same time, or phrased in more technical terms, they can “condense” into a coherent wave. When this type of condensation happens for matter particles, physicists call the resulting substance a Bose-Einstein Condensate.

In everyday life, we are not at all familiar with these condensates. The reason: it is very difficult to get atoms to all behave as one. The culprit destroying the synchronicity is temperature—when a substance heats up, the constituent particles start to jiggle around, and it becomes virtually impossible to get them to behave as one. Only at extremely low temperatures, about a millionth of a degree above absolute zero (about 273 degrees below zero on the Celsius scale), is there a chance of forming the coherent matter waves of a BEC.

Fleeting bursts

A quarter of a century ago, the first Bose-Einstein Condensates were created in physics labs. This opened up the possibility to build atom lasers—devices that literally output beams of matter—but these devices were only able to function for a very short time. The lasers could produce pulses of matter waves, but after sending out such a pulse, a new BEC had to be created before the next pulse could be sent out. For a first step towards an atom laser, this was still not bad. In fact, ordinary, optical lasers were also made in a pulsed variant before physicists were able to create continuous lasers. But while the developments for optical lasers had gone very fast, the first continuous laser being produced within six months after its pulsed counterpart, for atom lasers the continuous version remained elusive for more than 25 years.

It was clear what the problem was: BECs are very fragile, and are rapidly destroyed when light falls on them. Yet the presence of light is crucial in forming the condensate: to cool a substance down to a millionth of a degree, one needs to cool down its atoms using laser light. As a result, BECs were restricted to fleeting bursts, with no way to coherently sustain them.

A Christmas present

A team of physicists from the University of Amsterdam has now managed to solve the difficult problem of creating a continuous Bose-Einstein Condensate. Florian Schreck, the team leader, explains what the trick was. “In previous experiments, the gradual cooling of atoms was all done in one place. In our setup, we decided to spread the cooling steps not over time, but in space: we make the atoms move while they progress through consecutive cooling steps. In the end, ultracold atoms arrive at the heart of the experiment, where they can be used to form coherent matter waves in a BEC. But while these atoms are being used, new atoms are already on their way to replenish the BEC. In this way we can keep the process going—essentially forever.”

While the underlying idea was relatively simple, carrying it out was certainly not. Chun-Chia Chen, first author of the publication in Nature, recalls: “Already in 2012, the team—then still in Innsbruck—realized a technique that allowed a BEC to be protected from laser cooling light, enabling for the first time laser cooling all the way down to the degenerate state needed for coherent waves. While this was a critical first step towards the long-held challenge of constructing a continuous atom laser, it was also clear that a dedicated machine would be needed to take it further. On moving to Amsterdam in 2013, we began with a leap of faith, borrowed funds, an empty room and a team entirely funded by personal grants. Six years later, in the early hours of Christmas morning 2019, the experiment was finally on the verge of working. We had the idea of adding an extra laser beam to solve a last technical difficulty, and instantly every image we took showed a BEC, the first continuous-wave BEC.”

Having tackled the long-standing open problem of creating a continuous Bose-Einstein Condensate, the researchers have now set their minds on the next goal: using the laser to create a stable output beam of matter. Once their lasers can not only operate forever but can also produce stable beams, nothing stands in the way of technical applications anymore, and matter lasers may start to play an equally important role in technology as ordinary lasers currently do.


Laser cooling for quantum gases


More information:
Chun-Chia Chen et al, Continuous Bose–Einstein condensation, Nature (2022). DOI: 10.1038/s41586-022-04731-z
Provided by
University of Amsterdam

Citation:
Physicists build an atom laser that can stay on forever (2022, June 14)
retrieved 15 June 2022
from https://phys.org/news/2022-06-physicists-atom-laser.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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New Laser Breakthrough for Gravitational Waves Will Test the Fundamental Limits of General Relativity

Artist’s concept of gravitational waves propagating through space.

New laser breakthrough to help increase understanding of

Gravitational wave scientists from The University of Western Australia (UWA) have led the development of a new laser mode sensor with unprecedented precision that will be used to probe the interiors of neutron stars and test the fundamental limits of general relativity.

Gravitational waves are “cosmic ripples” in space-time caused by some of the most energetic and violent processes in the Universe such as neutron stars or black holes orbiting each other, colliding black holes, supernovae, and colliding neutron stars.

Research Associate from UWA’s Center of Excellence for Gravitational Wave Discovery (OzGrav-UWA) Dr. Aaron Jones, said UWA co-ordinated a global collaboration of gravitational wave, metasurface, and photonics experts to pioneer a new method to measure structures of light called “eigenmodes.”

“Gravitational wave detectors like

“However, each of these pairs has small distortions that scatters light away from the perfect shape of the laser beam which can cause excess noise in the detector, limiting sensitivity and taking the detector offline.

“We wanted to test an idea that would let us zoom in on the laser beam and look for the small ‘wiggles’ in power that can limit the detectors’ sensitivity.”

A schematic of the apparatus used by the researchers. ‘f’ is the focal length of the lens. Credit: University of Western Australia

Dr. Jones said a similar problem is encountered in the telecoms industry where scientists are investigating ways to use multiple eigenmodes to transport more data down optical fibers.

“Telecoms scientists have developed a way to measure the eigenmodes using a simple apparatus, but it’s not sensitive enough for our purposes,” he said. “We had the idea to use a metasurface – an ultra-thin surface with a special pattern encoded in sub-wavelength size – and reached out to collaborators who could help us make one.”

The proof-of-concept setup the team developed was over one thousand times more sensitive than the original apparatus developed by telecoms scientists and the researchers will now look to translate this work into gravitational wave detectors.


Gravitational waves are distortions in spacetime that result from the movements of objects with mass. Credit:

“Solving the mode sensing problem in future gravitational wave detectors is essential if we are to understand the insides of neutron stars and further our observation of the universe in a way never before possible,” Associate Professor Zhao said.

The breakthrough is detailed in a study published in Physical Review.

For more on this research, see Gravitational Wave Scientists Pioneer New Laser Mode Sensor With Unprecedented Precision.

Reference: “Metasurface-enhanced spatial mode decomposition” by Aaron W. Jones, Mengyao Wang, Xuecai Zhang, Samuel J. Cooper, Shumei Chen, Conor M. Mow-Lowry and Andreas Freise, 26 May 2022, Physical Review A.
DOI: 10.1103/PhysRevA.105.053523



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New laser breakthrough to help understanding of gravitational waves

A visualization of a supercomputer simulation of merging black holes sending out gravitational waves. Credit: NASA/C. Henze

Gravitational wave scientists from The University of Western Australia have led the development of a new laser mode sensor with unprecedented precision that will be used to probe the interiors of neutron stars and test fundamental limits of general relativity.

Research Associate from UWA’s Centre of Excellence for Gravitational Wave Discovery (OzGrav-UWA) Dr. Aaron Jones said UWA coordinated a global collaboration of gravitational wave, metasurface and photonics experts to pioneer a new method to measure structures of light called “eigenmodes.”

“Gravitational wave detectors like LIGO, Virgo and KAGRA store enormous amount of optical power and several pairs of mirrors are used to increase the amount of laser light stored along the massive arms of the detector,” Dr. Jones said.

“However, each of these pairs has small distortions that scatters light away from the perfect shape of the laser beam, which can cause excess noise in the detector, limiting sensitivity and taking the detector offline.

“We wanted to test an idea that would let us zoom in on the laser beam and look for the small ‘wiggles’ in power that can limit the detectors’ sensitivity.”

Dr. Jones said a similar problem is encountered in the telecoms industry where scientists are investigating ways to use multiple eigenmodes to transport more data down optical fibers.

“Telecoms scientists have developed a way to measure the eigenmodes using a simple apparatus, but it’s not sensitive enough for our purposes,” he said. “We had the idea to use a metasurface—an ultra-thin surface with a special pattern encoded in sub-wavelength size—and reached out to collaborators who could help us make one.”

The proof-of-concept setup the team developed was over one thousand times more sensitive than the original apparatus developed by telecoms scientists and the researchers will now look to translate this work into gravitational wave detectors.

OzGrav-UWA Chief Investigator Associate Professor Chunnong Zhao said the development is another step forward in detecting and analyzing the information carried by gravitational waves, allowing us to observe the universe in new ways.

“Solving the mode sensing problem in future gravitational wave detectors is essential if we are to understand the insides of neutron stars and further our observation of the universe in a way never before possible,” Associate Professor Zhao said.

The study has been accepted for publication in Physical Review A.


An interactive gravitational-wave detector model designed to educate at museums and fairs


More information:
Metasurface Enhanced Spatial Mode Decomposition, arXiv:2109.04663v2 [physics.optics] arxiv.org/abs/2109.04663
Provided by
University of Western Australia

Citation:
New laser breakthrough to help understanding of gravitational waves (2022, May 30)
retrieved 31 May 2022
from https://phys.org/news/2022-05-laser-breakthrough-gravitational.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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Wild Apophis asteroid spacecraft concept includes laser probes

An early-stage mission concept could see laser-driven light-sail probes visit a notorious asteroid.

The space rock Apophis, which poses no threat to Earth whatsoever for at least 100 years, will make a harmless but very close flyby of our Earth in 2029. Scientists have already figured out a way to visit Apophis after the flyby:  NASA’s OSIRIS-REx spacecraft will visit the asteroid after dropping off samples from another space rock at Earth, the agency decided in April.

But 2029 might be just enough time to squeeze out a few more mission ideas. A conference held online May 11 and 12 by the Houston-based Lunar and Planetary Institute investigated possible applications for planetary defense. 

Among the presentations was one describing an idea to test out a rapid launch scenario in case of impending trouble, not that we have found any asteroids to worry about yet. It also could serve as an early test for another laser-driven craft that may go interstellar one day, known as Breakthrough Starshot.

Related: Huge asteroid Apophis revealed in photos

The May 12 presentation, by Paul Blase of small satellite startup Space Initiatives Inc. of Florida, outlined a mission concept that would launch a pair of mini spacecraft aboard a Black Brant sounding rocket. Each probe would be armed with a few simple instruments like tiny cameras and spectrometers. 

One spacecraft would release above the thickest part of the atmosphere at 46 miles (75 kilometers), while the other would release at the rocket’s maximum altitude of 930 miles (1,500 kilometers). A laser array fired from Earth (potentially at NASA’s facility on Wallops Island in Virginia, Blase suggested), would then push each probe to an apogee of 18,600 miles (30,000 km). The Friday the 13th flyby of Apophis in 2029 will see the asteroid pass by in this range, which is so close that it is within the orbit of some satellites.

The first 3D-printed probe would impact the asteroid, while the second would observe the impact plume with a spectrometer, Blase explained. The data would be recovered from the second spacecraft after re-entry.

“This is only a gram,” he said of the impacting spacecraft’s mass, “so it’s not going to do much. But it will raise a plume.”

The team is considering other mission concepts, too. There could be regular flybys in the weeks before, during and after approach, for example. Each of these concepts would cost about $2 million, Blase estimated, which is relatively cheap for spacecraft development. 

He estimated it would only take five years to put the mission together. “And then once Apophis comes through, everything’s done in about 12 hours,” he said.

Testing an asteroid rapid-response capability will be critical for planetary defense one day, Blase said. Space-rock tracking has improved, but many (harmless) near-Earth asteroids are spotted with a week or less to go before their first known flyby.

The team envisions having these little laser-driven craft on standby to rapidly approach a hazardous space rock and redirect it. “All of the basic technology in the this proposal currently exists,” he said, adding, “We believe that Apophis offers a good opportunity to develop these capabilities for future use.”

While this early-stage and so-far unfunded proposal is not associated with the ambitious Breakthrough Starshot that hopes to reach the Alpha Centauri system in a few decades, Blase said his team’s laser craft would serve as a help for that mission’s planning. 

For example, the laser array necessary for the asteroid mission would be tens of megawatts instead of gigawatts, meaning testing could occur at a smaller scale for feasibility. The Apophis mission also would happen very close to Earth, allowing for engineering assessments to take place before an interstellar craft departs.

Follow Elizabeth Howell on Twitter @howellspace. Follow us on Twitter @Spacedotcom and on Facebook.



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‘Megamaser’ space laser spotted by South African telescope

This record-breaking megamaser is the most distant one ever observed at 5 billion light-years away from Earth.

The light from this space laser traveled a whopping 36 thousand billion billion miles (58 thousand billion billion kilometers) to reach our planet.

An international team of astronomers, led by Marcin Glowacki, observed this light, using the South African Radio Astronomy Observatory’s MeerKAT telescope. (MeerKAT is shorthand for Karoo Array Telescope, preceded by the Afrikaans word for “more.”)

Glowacki is a research associate at the Curtin University node of the International Centre for Radio Astronomy Research in Australia.

Megamasers are created when two galaxies crash into each other. It is the first hydroxyl megamaser that MeerKAT has observed, Glowacki said.

Hydroxl, a chemical group consisting of one hydrogen atom and one oxygen atom, can be found inside galaxy mergers.

“When galaxies collide, the gas they contain becomes extremely dense and can trigger concentrated beams of light to shoot out,” Glowacki said in a statement.

The research team has named the laser Nkalakatha, which means “big boss” in isiZulu, the Bantu language of the Zulus in South Africa.

The astronomers detected the megamaser on the first night of a survey that spanned more than 3,000 hours of observation time using MeerKAT.

“It’s impressive that, with just a single night of observations, we’ve already found a record-breaking megamaser,” Glowacki said. “It shows just how good the telescope is.”

The research team is continuing to use MeerKAT to observe narrow areas in the sky closely and search for the same elements spied in the megamaser. Doing so could provide more insight into how the universe has evolved.

“We have follow-up observations of the megamaser planned and hope to make many more discoveries,” Glowacki said.

The MeerKAT telescope, located in the Karoo region of South Africa, includes an array of 64 radio dishes and has been operational since July 2018. The powerful telescope is sensitive to faint radio light.

MeerKAT is a precursor to the transcontinental Square Kilometre Array, or SKA, a telescope under construction in both South Africa and Australia.

The array will include thousands of dishes and up to 1 million low-frequency antennas in an effort to build the world’s largest radio telescope.

Despite the fact that these dishes and antennas will be in different parts of the world, together they will create one telescope that has over 1 square kilometer (0.39 square miles) of collecting area. As a result, astronomers can survey the entire sky much more quickly than with other telescopes.

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Astronomers detect a powerful space laser that is 5 billion light-years away

An international team of astronomers led by Dr. Marcin Glowacki, who previously worked at the Inter-University Institute for Data Intensive Astronomy and the University of the Western Cape in South Africa, has made an impressive discovery from 5 billion light-years away, according to a statement released by the institution on Thursday.

Using the MeerKAT telescope in South Africa, the researchers discovered a powerful radio-wave laser, called a ‘megamaser’,  that is the most distant megamaser of its kind ever detected. Its light has traveled 58 thousand billion billion (58 followed by 21 zeros) kilometers to Earth. 

When galaxies collide…

How did it come to be? Megamasers occur when two galaxies violently collide in the Universe.

“When galaxies collide, the gas they contain becomes extremely dense and can trigger concentrated beams of light to shoot out,” Glowacki said. “This is the first hydroxyl megamaser of its kind to be observed by MeerKAT and the most distant seen by any telescope to date. It’s impressive that, with just a single night of observations, we’ve already found a record-breaking megamaser. It shows just how good the telescope is.”

The researchers named the object ‘Nkalakatha’ [pronounced ng-kuh-la-kuh-tah]—an isiZulu word meaning “big boss” and further emphasized how impressive it was to find the record-breaking object within just one night of observations.

A single night of observations

“It’s impressive that in a single night of observations with MeerKAT, we already found a redshift record-breaking megamaser. The full 3000+ hour LADUMA survey will be the most sensitive of its kind,” Glowacki said in a statement by the University of the Western Cape. LADUMA is the project that Glowacki and his team are currently working on and it stands for Looking at the Distant Universe with the Meerkat Array.

Next, the team sought to explore where the megamaser was coming from. Luckily, the patch of sky explored by the LADUMA team had been observed in X-rays, optical light, and infra-red making it easy to spot the object’s host galaxy.

But their work still continues as the celestial object still has many mysteries to unravel. “We have already planned follow-up observations of the megamaser, and as LADUMA progresses we will make many more discoveries,” concluded Glowacki. 



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‘Space laser’ is beaming directly at Earth from 5 billion lightyears away

A powerful space laser emitted from a distant galaxy has been discovered by astronomers.

The beam of radio waves is what scientists call a “megamaser” and this one is the most distant yet, emerging 5 billion light-years from Earth.

It was detected by an international team of scientists using South Africa’s “MeerKAT,” a radio telescope consisting of 64 antennas.

Megamasers are naturally occurring, radio-wavelength lasers that can help shed light on galaxy collisions.

“Megamasers act like bright lights that say: Here is a collision of galaxies that is making new stars and feeding massive black holes,” said study co-author Jeremy Darling, of the University of Colorado.

When galaxies merge, the gas they contain becomes extremely dense, producing a specific radio signal known as a maser.

Megamasers are powerful masers produced in huge galaxy collisions, like beams from cosmic lighthouses.

The unearthing of the most distant megamaser to date was described by Darling and colleagues in a research paper published last week.

To reflect its status as a record-breaking, the team named the space laser Nkalakatha – an isiZulu word meaning “big boss”.

“Nkalakatha is one of the most powerful OH megamasers known, and it’s the most distant megamaser of its kind ever discovered, so it is truly a ‘big boss,’” said study coauthor and Rutgers University astronomer Professor Andrew Baker.

“We expect it is only the first of many OH [hydroxyl] megamasers that will be discovered as the project continues.”

A general view of one of a 64-dish radio telescope system is seen during an official unveiling ceremony on July 13, 2018 in Carnarvon.
AFP via Getty Images

Rather than emitting visible light, a maser emits microwave and radio wavelengths that are amplified by cosmic forces.

Once the team established that they had a megamaser on their hands, they began the hunt for the galaxy it came from.

They found that the Nkalakatha galaxy is about seven billion light-years away and has a long tail on one side, visible in radio waves.

The light from the megamaser was emitted about five billion years ago when the universe was only two-thirds of its current age.

The main goal of the MeerKAT project is to use make observations of gas in distant galaxies to help understand how galaxies have evolved over the last nine billion years.

Because these radio signals are faint, the researchers aim to obtain thousands of hours of observations with MeerKAT to detect them.

The data are crunched by powerful computers to help unearth signs of distant and ancient objects of interest.

“MeerKAT will probably double the known number of these rare phenomena,” Darling said.

“Galaxies were thought to merge more often in the past, and the newly discovered OH megamasers will allow us to test this hypothesis.”

This story originally appeared on The Sun and was reproduced here with permission.

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