Universe Today

January 25, 2014December 23, 2015 by Ken Kremer

Now is Your Last Chance to Visit Inside NASA’s Iconic Vehicle Assembly Building – and maybe see an Orion

NASA’s iconic Vehicle Assembly Building (VAB) and Launch Control Center (LCC) at the Kennedy Space Center, Florida. Public access tours inside the VAB will end on Feb. 11, 2014. NASA’s Apollo Saturn V Moon rockets and Space Shuttles were assembled inside.
Credit: Ken Kremer – kenkremer.com
Story updated- Last chance to visit VAB extended to Feb. 23[/caption]

If you have ever wanted to take a personal trip inside NASA’s world famous Vehicle Assembly Building (VAB) at Kennedy Space Center in Florida, now is the time.

In fact this is your last chance. Because access to the hugely popular public tours will end very soon. And perhaps you’ll see an Orion test capsule too.

Indeed you only have until Feb. 11 [Update: now extended to Feb. 23] to enjoy the KSC “Up-Close Tour” inside the 52 story tall VAB, according to an announcement by the privately run Kennedy Space Center Visitor Complex, which organizes the VAB tours.

The VAB is an iconic world wide symbol of America’s space program.

And it’s home to many of NASA’s finest and most historic exploration achievements – including all the manned Apollo Moon landings and the three decade long Space Shuttle program that launched the Hubble Space Telescope and the International Space Station (ISS) to orbit.

Why are the interior public tours being halted, barely 2 years after they started?

Because after a bit of a lull following the termination of NASA’s Space Shuttle program, space launch activities are ramping up once again and the agency must complete much needed building renovations to prepare for the next step in human exploration of the cosmos – SLS, Orion and commercial ‘space taxis’.

Orion crew capsule, Service Module and 6 ton Launch Abort System (LAS) mock up stack inside the transfer aisle of the Vehicle Assembly Building (VAB) at the Kennedy Space Center (KSC) in Florida. Credit: Ken Kremer/kenkremer.com

The agency needs unfettered use of the VAB to prepare for assembly, lifting and stacking of the new Orion crew capsule and it’s new monster booster rocket – the Space Launch System (SLS) – slated for its maiden blastoff in 2017.

You can always see the 525 foot tall VAB from the outside, gleaming proudly from miles away.

And it’s a must see from up close outside glimpses aboard tour buses driving by all day long – resplendent with a mammoth red, white and blue American flag painted on its side.

But nothing compares to being an eyewitness to history and seeing it from the inside with your own eyes, especially if you are a space enthusiast!

The VAB is one of the largest and most voluminous buildings in the world.

Since 1978, the VAB interior had been off limits to public visitors for more than 30 years during the shuttle era. It was too hazardous to visit because of the presence of the giant shuttle solid rocket boosters loaded with fuel.

Orion Ground Test Article (GTA) recently displayed on the floor inside the Vehicle Assembly Building (VAB). Credit: Ken Kremer - kenkremer.com — Orion Ground Test Article (GTA) recently displayed on the floor inside the Vehicle Assembly Building (VAB). Credit: Ken Kremer – kenkremer.com

Inside access was finally restored to guests at Kennedy Space Center Visitor Complex in November 2011, following the retirement of the space shuttles.

Visitors could again “see firsthand where monstrous vehicles were assembled for launch, from the very first Saturn V rocket in the late 1960s to the very last space shuttle, STS-135 Atlantis, in 2011.”

Although the shuttles are now gone, there is a possibility that maybe you’ll be lucky enough to see an Orion test capsule that’s been used in real ground testing to help NASA prepare for upcoming missions.

Since the layout is constantly changing, there is no guarantee on seeing the Orion.

Possibly either an Orion boilerplate test article or the Ground Test Article (GTA) which was the first flight worthy Orion capsule to be built. The GTA is the path finding prototype for the Orion EFT-1 capsule currently in final assembly and slated to launch this Fall 2014.

Perhaps you’ll be lucky enough to snap a shot like one of mine of the Orion GTA on the floor of the main working area of the VAB – known as the transfer aisle.

You will definitely get the feel for the greatest hits in space history inside the place where the moon rockets and space shuttles were lifted, stacked and assembled for flight and then rolled out to either Launch Pad 39 A or 39 B.

Atlantis approaches the VAB for the final time. Credit: Ken Kremer — Atlantis approaches the VAB for the final time during preparations for the STS-135 flight in 2011. Credit: Ken Kremer – kenkremer.com

“Kennedy Space Center Visitor Complex has been honored to give our guests rare access to the VAB for the past two years, yet we knew that the day would come when preparations for the SLS would take precedent,” said Therrin Protze, chief operating officer for the Visitor Complex, in a statement.

“Kennedy Space Center is an operating space program facility, and preparations for the next chapter in space exploration are the utmost priority, and we are very excited about the future.”

Starting in 2017, America will again launch a mighty rocket – the SLS that will blast Americans to deep space after an unbelievable 50 year gap.

Full belly view of Space Shuttle Discovery coated with thousands of protective heat shield tiles in the transfer aisle of the VAB where it was processed for final launch on STS-133 mission. Note two rectangular attach points holding left and right side main separation bolts. Credit: Ken Kremer - kenkremer.com — Full belly view of Space Shuttle Discovery coated with thousands of protective heat shield tiles in the transfer aisle of the VAB where it was processed for final launch on STS-133 mission. Note two rectangular attach points holding left and right side main separation bolts. Credit: Ken Kremer – kenkremer.com

So for only about the next two weeks, you can see one of the greatest treasures of America’s space program and appreciate the cavernous interior from where our astronauts once set off for the Moon as part of the “Mega Tour”.

The “Mega Tour”, which also included visits to Launch Pad 39 A and the Launch Control Center (LCC) ends on Feb. 11, the visitor complex announced.

However the visitor complex is still offering a modified “Up-Close” tour to Pad 39A and the Launch Control Center (LCC) – at this time. But that’s subject to change at any moment depending on NASA’s priorities.

View of NASA’s 52 story tall Vehicle Assembly Building (VAB) as seen from the top of Launch Pad 39 A. Credit: Ken Kremer - kenkremer.com — View of NASA’s 52 story tall Vehicle Assembly Building (VAB) as seen from the very top of Launch Pad 39 A gantry. Credit: Ken Kremer – kenkremer.com

And don’t forget that you can also see NASA’s genuine Space Shuttle Atlantis in its new permanent exhibition hall at the Kennedy Space Center Visitor Complex.

Please check the visitor center website for complete details and admission pricing on “Up-Close” tours and everything else – www.kennedyspacecenter.com

There is one thing I can guarantee – if you don’t go you will see nothing!

Catch it if you can. It’s NOT coming back any time soon!

Stay tuned here for Ken’s continuing Orion, Chang’e-3, Orbital Sciences, SpaceX, commercial space, LADEE, Mars and more news.

Ken Kremer

View of the Vehicle Assembly Building (VAB) and the Turn Basin adjacent to the Kennedy Space Center Press Center and the countdown clock. Credit: Ken Kremer – kenkremer.com

January 24, 2014December 23, 2015 by Brian Koberlein

Black Holes No More? Not Quite.

Where is the Nearest Black Hole — Artist concept of matter swirling around a black hole. (NASA/Dana Berry/SkyWorks Digital)

Nature News has announced that there are no black holes. This claim is made by none other than Stephen Hawking, so does this mean black holes are no more? It depends on whether Hawking’s new idea is right, and on what you mean be a black hole. The claim is based on a new paper by Hawking that argues the event horizon of a black hole doesn’t exist.

The event horizon of a black hole is basically the point of no return when approaching a black hole. In Einstein’s theory of general relativity, the event horizon is where space and time are so warped by gravity that you can never escape. Cross the event horizon and you can only move inward, never outward. The problem with a one-way event horizon is that it leads to what is known as the information paradox.

Professor Stephen Hawking during a zero-gravity flight. Image credit: Zero G.

The information paradox has its origin in thermodynamics, specifically the second law of thermodynamics. In its simplest form it can be summarized as “heat flows from hot objects to cold objects”. But the law is more useful when it is expressed in terms of entropy. In this way it is stated as “the entropy of a system can never decrease.” Many people interpret entropy as the level of disorder in a system, or the unusable part of a system. That would mean things must always become less useful over time. But entropy is really about the level of information you need to describe a system. An ordered system (say, marbles evenly spaced in a grid) is easy to describe because the objects have simple relations to each other. On the other hand, a disordered system (marbles randomly scattered) take more information to describe, because there isn’t a simple pattern to them. So when the second law says that entropy can never decrease, it is say that the physical information of a system cannot decrease. In other words, information cannot be destroyed.

The problem with event horizons is that you could toss an object (with a great deal of entropy) into a black hole, and the entropy would simply go away. In other words, the entropy of the universe would get smaller, which would violate the second law of thermodynamics. Of course this doesn’t take into account quantum effects, specifically what is known as Hawking radiation, which Stephen Hawking first proposed in 1974.

The original idea of Hawking radiation stems from the uncertainty principle in quantum theory. In quantum theory there are limits to what can be known about an object. For example, you cannot know an object’s exact energy. Because of this uncertainty, the energy of a system can fluctuate spontaneously, so long as its average remains constant. What Hawking demonstrated is that near the event horizon of a black hole pairs of particles can appear, where one particle becomes trapped within the event horizon (reducing the black holes mass slightly) while the other can escape as radiation (carrying away a bit of the black hole’s energy).

Hawking radiation near an event horizon. Credit: NAU.

Because these quantum particles appear in pairs, they are “entangled” (connected in a quantum way). This doesn’t matter much, unless you want Hawking radiation to radiate the information contained within the black hole. In Hawking’s original formulation, the particles appeared randomly, so the radiation emanating from the black hole was purely random. Thus Hawking radiation would not allow you to recover any trapped information.

To allow Hawking radiation to carry information out of the black hole, the entangled connection between particle pairs must be broken at the event horizon, so that the escaping particle can instead be entangled with the information-carrying matter within the black hole. This breaking of the original entanglement would make the escaping particles appear as an intense “firewall” at the surface of the event horizon. This would mean that anything falling toward the black hole wouldn’t make it into the black hole. Instead it would be vaporized by Hawking radiation when it reached the event horizon. It would seem then that either the physical information of an object is lost when it falls into a black hole (information paradox) or objects are vaporized before entering a black hole (firewall paradox).

In this new paper, Hawking proposes a different approach. He argues that rather than instead of gravity warping space and time into an event horizon, the quantum fluctuations of Hawking radiation create a layer turbulence in that region. So instead of a sharp event horizon, a black hole would have an apparent horizon that looks like an event horizon, but allows information to leak out. Hawking argues that the turbulence would be so great that the information leaving a black hole would be so scrambled that it is effectively irrecoverable.

If Stephen Hawking is right, then it could solve the information/firewall paradox that has plagued theoretical physics. Black holes would still exist in the astrophysics sense (the one in the center of our galaxy isn’t going anywhere) but they would lack event horizons. It should be stressed that Hawking’s paper hasn’t been peer reviewed, and it is a bit lacking on details. It is more of a presentation of an idea rather than a detailed solution to the paradox. Further research will be needed to determine if this idea is the solution we’ve been looking for.

January 24, 2014December 23, 2015 by Nancy Atkinson

More Great Images of Supernova 2014J Plus View it During Live Webcasts

M82 and Supernova 2014J imaged on January 23, 2014. Credit and copyright: Mick Hyde.

Images keep pouring in of the biggest excitement in astronomy this week, a new Type Ia supernova in the Cigar Galaxy, 82, about 12 million light years away. As has been said, the Cigar got lit!

This is the closest supernova of this type since the 1800’s. Astrophotographers have been out in full force trying to nab this event, we’ve got more great images to share today, and we’ll keep adding them as they come in.

If you haven’t been able to take a look for yourself, you can join a live webcast from the folks at the Virtual Telescope Project on Saturday, January 25, 2014 at 20:30 UTC (3 pm EST, 1 pm PST), which you can watch here.

Plus, Fraser and the Virtual Star Party will surely try to nab M82 during their hangout on Sunday January 26 at 9 pm EST. Click the VSP link to find out when it starts in your time zone.

SN2014J on January 23, 2014, as seen from Rhode Island. Credit and copyright: Lloyd Merrill

M82 with Supernova 2014J imaged on January 23, 2014. Credit and copyright: Anna Morris.

M82 and SN2014J as seen through a 6 inch telescope on January 23, 2014. Credit and copyright: Bill Magee.

Before and after the supernova in M82. Credit and copyright: Astrokid96 on Flickr.

M82 and M81 imaged on January 23, 2014. Credit and copyright: Gregory Hogan.

Comparison images of M82 nine months apart: on April 4, 2013 and January 23, 2014. Credit and copyright: Paul Campbell.

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

January 24, 2014December 29, 2015 by Fraser Cain

Weekly Space Hangout – January 24, 2014: LEGO Mars Rover & the Supernova We Missed in the Star Party!

Host: Fraser Cain

Special Guests: Stephen Pakbaz, designer of the LEGO Mars Rover Kit, and Ray Sanders from CosmoQuest, who is unboxing and building the kit as we hang out!

Astrojournalists: Morgan Rehnberg, Sondy Springmann, Elizabeth Howell, Casey Dreier, David Dickinson, Nicole Gugliucci, Mike Simmons
Continue reading “Weekly Space Hangout – January 24, 2014: LEGO Mars Rover & the Supernova We Missed in the Star Party!”

January 24, 2014December 23, 2015 by Elizabeth Howell

Double Vision! These ‘Twin’ Quasars Are Actually The Same Thing

The quasar QSO 0957+561 appears twice in the center of this image due to a phenomenon known as gravitational lensing, which takes place when light bends around another (massive) object. Credit: ESA/NASA

Optical illusions are awesome. In the center of this image are what appear to be two quasars (or galaxies with huge black holes). In fact, however, it’s the same quasar seen twice. So what’s going on?

QSO 0957+561, also called the “Twin Quasar”, was first spotted in 1979. It lies almost 14 billion light-years from Earth (making it about as old as the Universe itself). Initially, astronomers thought it was indeed two objects, but the distances and characteristics of the twins were too similar.

We “see” the quasar twice because of a ginormous galaxy called YGKOW G1. Its immense gravitational mass is bending the light of the quasar so that it appears twice from our perspective. This phenomenon is called “gravitational lensing”, and it turned out in 1979 that QSO 0957+561 was the first object ever confirmed to experience that. (You can read the original Nature research paper here.)

While the discovery is decades old, it’s still fun to turn telescopes in that direction once in a while to spot the illusion. This particular image is a new one from the Hubble Space Telescope.

Source: NASA

January 24, 2014December 23, 2015 by Elizabeth Howell

‘Cosmic Flashlight’ Makes Gas Glow Like A Fluorescent Light Bulb

A nebula (seen in cyan) that is about two million light-years across. It was found surrounding the bright quasar UM287 (center). Credit: S. Cantalupo (UCSC)

Funny how a single quasar can illuminate — literally and figuratively — some of the mysteries of the universe. From two million light-years away, astronomers spotted a quasar (likely a galaxy with a supermassive black hole in its center) shining on a nearby collection of gas or nebula. The result is likely showing off the filaments thought to connect galaxies in our universe, the team said.

“This is a very exceptional object: it’s huge, at least twice as large as any nebula detected before, and it extends well beyond the galactic environment of the quasar,” stated Sebastiano Cantalupo, a postdoctoral fellow at the University of California Santa Cruz who led the research.

The find illuminated by quasar UM287 could reveal more about how galaxies are connected with the rest of the “cosmic web” of matter, astronomers said. While these filaments were predicted in cosmological simulations, this is the first time they’ve been spotted in a telescope.

“Gravity causes ordinary matter to follow the distribution of dark matter, so filaments of diffuse, ionized gas are expected to trace a pattern similar to that seen in dark matter simulations,” UCSC stated.

A graphic showing how matter in the universe could be distributed. Some astronomers believe matter is sprinkled as a a "cosmic web" of filaments. The larger section shows a dark-matter simulation (by Anatoly Klypin and Joel Primack) and the inset a smaller portion, 10 million light-years across, from another simulation that also includes gas (S. Cantalupo). Credit: S. Cantalupo (UCSC), Joel Primack (UCSC) and Anatoly Klypin (NMSU). — A graphic showing how matter in the universe could be distributed. Some astronomers believe matter is sprinkled as a a “cosmic web” of filaments. The larger section shows a dark-matter simulation (by Anatoly Klypin and Joel Primack) and the inset a smaller portion, 10 million light-years across, from another simulation that also includes gas (S. Cantalupo). Credit: S. Cantalupo (UCSC), Joel Primack (UCSC) and Anatoly Klypin (NMSU).

Astronomers added that it was lucky that the quasar happened to be shining in the right direction to illuminate the gas, acting as a sort of “cosmic flashlight” that could show us more of the underlying matter. UM287 is making the gas glow in a similar way that fluorescent light bulbs behave on Earth, the team added.

“This quasar is illuminating diffuse gas on scales well beyond any we’ve seen before, giving us the first picture of extended gas between galaxies,” stated J. Xavier Prochaska, coauthor and professor of astronomy and astrophysics at UC Santa Cruz. “It provides a terrific insight into the overall structure of our universe.”

The find was made using the 10-meter Keck I telescope at the W. M. Keck Observatory in Hawaii. You can check out more details on the discovery on the Keck Observatory’s website or at this press release from the Max Planck Institute for Astronomy in Heidelberg, Germany.

The research was published in the Jan. 19 edition of Nature and available in preprint version on Arxiv.

January 24, 2014December 23, 2015 by Nancy Atkinson

The Difficulties of Operating a Rover on Mars for 10 Years

NASA's Opportunity Mars rover recorded the component images for this self-portrait near the peak of Solander Point and about three weeks before completing a decade of work on Mars. The rover's panoramic camera (Pancam) took the images during the interval Jan. 3, 2014, to Jan. 6, 2014. Credit: NASA/JPL-Caltech/Cornell/Arizona State University

Want to get an engineer excited? Give them a challenge. And the Opportunity rover has provided plenty of challenges in the past 10 years on Mars. Fun challenges, though; amazing tests of wit and skill, doing repairs on a rover that is sometimes a hundred million kilometers away. But with the longevity of the rovers also comes some amazing science.

The Opportunity rover is celebrating ten years on Mars. While the rovers were designed for about 1 kilometer of odometry, Oppy has now traveled 38.7 kilometers (24 miles). At yesterday’s briefing, the rover scientists and engineers said Opportunity is still in very good health and still is scientifically productive.

In the recent “selfie” image below, you can see how the rover is covered with dust, almost perfectly camouflaged with its environment. That montage was taken a few weeks ago, but recently there have been some wind cleaning events that have dusted off the solar panels, improving the solar power from 47% to 60%, which is higher than it has been through the past two Martian winters. This means they can continue to drive and explore even more, perhaps even during the upcoming winter.

Dust covering the rovers’ solar panels was one of the reasons that the initial estimates of the rovers’ life was only for 90 days. The dust cleaning events have been an unexpected benefit that has allowed for the long missions for the MER rovers.

Beyond the scientific findings of potential habitability announced yesterday, John Callas, project manager for the Mars Exploration Rovers said both Spirit and Opportunity have given us a great intangible.

“Through these rovers our species has gone to work on Mars, and now a generation has grown up with these rovers and have been inspired by them,” Callas said. “Because of these rovers Earthlings have become Martians too, dual citizens, if you will. We now live in a larger world, a world than now extends beyond our own home planet these rovers have made Mars our neighborhood and our backyard, something truly remarkable.”

January 24, 2014December 23, 2015 by Elizabeth Howell

After A Long Nap, NEOWISE Springs Into Action With Asteroid Discoveries

Dots (circled) in this image show the first asteroid spotted by NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) after the mission came out of hibernation. Credit: NASA

If anything, NASA’s asteroid-hunting spacecraft seems to be refreshed after going into forced hibernation for 2.5 years. In the first 25 days since it started seeking small solar system bodies in earnest again, the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) found three new objects and detected an additional 854, NASA said Thursday (Jan. 23).

Luckily for people interested in this field, Amy Mainzer (the principal investigator for this mission) has been tweeting out discoveries as they come — and other observations besides. “Just passed our @WISE_Mission post-restart review. I believe the technical term is “Yee haw!!” she wrote Jan. 21. Below are a couple of illustrated examples of discoveries from her Twitter feed. Click on the pictures for larger versions.

In a release, NASA added that NEOWISE is “observing and characterizing” one NEO a day, which means not only looking at the object, but probing its size and composition. Astronomers know of about 10,500 NEOs, but of those only 10% (or about 1,500) have physical measurements cataloged as well. NEOWISE investigators aim to make hundreds of more of these measurements.

The mission (originally called WISE) launched in December 2009 to examine the universe in infrared light. After completely mapping the sky, it ran out of coolant it needed to do this work in 2010. It then shifted to examining comets and asteroids before being put into hibernation in February 2011. Read more about its mission history in this past Universe Today article.

January 24, 2014December 23, 2015 by David Dickinson

Nearby Brown Dwarf Captured in a Direct Image

A direct image of a brown dwarf companion (arrowed) taken at the Keck Observatory. (Credit: Crepp et al. 2014 APJ).

A recent find announced by astronomers may go a long ways towards understanding a crucial “missing link” between planets and stars.

The team, led by Friemann Assistant Professor of Physics at the University of Notre Dame’s Justin R. Crepp, recently released an image of a brown dwarf companion to a star 98 light years or 30 parsecs distant. This discovery marks the first time that a T-dwarf orbiting a Sun-like star with known radial velocity acceleration measurement has been directly imaged.

Located in the constellation Eridanus, the object weighs in at about 52 Jupiter masses, and orbits a 0.95 Sol mass star 51 Astronomical Units (AUs) distant once every 320-1900 years. Note that this wide discrepancy stems from the fact that even though we’ve been following the object for some 17 years since 1996, we’ve yet to ascertain whether we’ve caught it near apastron or periastron yet: we just haven’t been watching it long enough.

The T-dwarf, known as HD 19467 B, may become a benchmark in the study of sub-stellar mass objects that span the often murky bridge between true stars shining via nuclear fusion and ordinary high mass planets.

Brown dwarfs are classified as spectral classes M, L, T, and Y and are generally quoted as having a mass of between 13 to 80 Jupiters. Brown dwarfs utilize a portion of the proton-proton chain fusion reaction to create energy, known as deuterium burning. Low mass red dwarf stars have a mass range of 80 to 628 Jupiters or 0.75% to 60% the mass of our Sun. The Sun has just over 1,000 times Jupiter’s mass.

Researchers used data from the TaRgeting bENchmark-objects with Doppler Spectroscopy (TRENDS) high-contrast imaging survey, and backed it up with more precise measurements courtesy of the Keck observatory’s High-Resolution Echelle Spectrometer or HIRES instrument.

An artist's conception of a T-type brown dwarf. (Credit: Tyrogthekreeper under a Wikimedia Commons Attribution-Share Alike 3.0 Unported license). — An artist’s conception of a T-type brown dwarf. (Credit: Tyrogthekreeper under a Wikimedia Commons Attribution-Share Alike 3.0 Unported license).

TRENDS uses adaptive optics, which relies on precise flexing the telescope mirror several thousands of times a second to compensate for the blurring effects of the atmosphere. Brown dwarfs shine mainly in the infrared, and objects such as HD 19467 B are hard to discern due to their close proximity to their host star. In this particular instance, for example, HD 19467 B was over 10,000 times fainter than its primary star, and located only a little over an arc second away.

“This object is old and cold and will ultimately garner much attention as one of the most well-studied and scrutinized brown dwarfs detected to date,” Crepp said in a recent Keck observatory press release. “With continued follow-up observations, we can use it as a laboratory to test theoretical atmospheric models. Eventually we want to directly image and acquire the spectrum of Earth-like planets. Then, from the spectrum, we should be able to tell what the planet is made of, what its mass is, radius, age, etc… basically all of its relevant properties.

Discovery of an Earth-sized exoplanet orbiting in a star’s habitable zone is currently the “holy grail” of exoplanet science. Direct observation also allows us to pin down those key factors, as well as obtain a spectrum of an exoplanet, where detection techniques such as radial velocity analysis only allow us to peg an upper mass limit on the unseen companion object.

This also means that several exoplanet candidates in the current tally of 1074 known worlds beyond our solar system also push into the lower end of the mass limit for substellar objects, and may in fact be low mass brown dwarfs as well.

Another key player in the discovery was the Near-Infrared Camera (second generation) or NIRC2. This camera works in concert with the adaptive optics system on the Keck II telescope to achieve images in the near infrared with a better resolution than Hubble at optical wavelengths, perfect for brown dwarf hunting. NIRC2 is most well known for its analysis of stellar regions near the supermassive black hole at the core of our galaxy, and has obtained some outstanding images of objects in our solar system as well.

The hexagonal primary mirror of the Keck II telescope. (Credit: SiOwl. A Wikimedia Commons image under a Creative Commons Attribution 3.0 Unported liscense). — The hexagonal primary mirror of the Keck II telescope. (Credit: SiOwl. A Wikimedia Commons image under a Creative Commons Attribution 3.0 Unported license).

What is the significance of the find? Free floating “rogue” brown dwarfs have been directly imaged before, such as the pair named WISE J104915.57-531906 which are 6.5 light years distant and were spotted last year. A lone 6.5 Jupiter mass exoplanet PSO J318.5-22 was also found last year by the PanSTARRS survey searching for brown dwarfs.

“This is the first directly imaged T-dwarf (very cold brown dwarf) for which we have dynamical information independent of its brightness and spectrum,” team lead researcher Justin Crepp told Universe Today.

Analysis of brown dwarfs is significant to exoplanet science as well.

“They serve as an essential link between our understanding of stars and planets,” Mr. Crepp said. “The colder, the better.”

And just as there has been a controversy over the past decade concerning “planethood” at the low end of the mass scale, we could easily see the debate applied to the higher end range, as objects are discovered that blur the line… perhaps, by the 23^rd century, we’ll finally have a Star Trek-esque classifications scheme in place so that we can make statements such as “Captain, we’ve entered orbit around an M-class planet…”

Something that’s always been fascinating in terms of red and brown dwarf stars is also the possibility that a solitary brown dwarf closer to our solar system than Alpha Centauri could have thus far escaped detection. And no, Nibiru conspiracy theorists need not apply. Mr. Crepp notes that while possible, such an object is unlikely to have escaped detection by infrared surveys such as WISE. But what a discovery that’d be!

January 24, 2014December 23, 2015 by Fraser Cain

Universe Today Videos Are Now Available As Podcasts

As you’ve probably seen, we’ve been releasing our Guide to Space videos on Universe Today for the last 9 months or so. We’ve been using YouTube, but lots of people have asked for a downloadable, podcastesque version that they can download automatically to their portable device.

We’ve gone ahead and fulfilled your request, uploading all our videos to archive.org, and then made the podcast feeds available for subscription or though iTunes. We’ve got a full video feed and then a full audio feed, so you can get the shows you want, how you want them.

Currently, we’ve only put up the shorter Guide to Space videos, but once we feel this is under control, we’ll add the other shows, like the Weekly Space Hangout and the Virtual Star Party. We’re going to try implementing categories, so you only download the shows you want.

As always, we’d really love your suggestions and feedback.

Here are your links:

Video RSS – http://www.universetoday.com/video/
Audio RSS – http://www.universetoday.com/audio/
Subscribe to Video on iTunes
Subscribe to Audio on iTunes

A big thanks to our producer Susie Murph for making this happen.