Universe Today

NASA's Astronaut Glove Centennial Challenge contest was held yesterday at the Astronaut Hall of Fame in Titusville, Florida, and two contestants walked away with a total of $350,000 in prize money for their improved designs of space suit gloves. Peter Homer of Southwest Harbor, Maine, won $250,000 for his glove, and Ted Southern of Brooklyn, New York won $100,000. Both contestants had participated in the 2007 event, and Peter Homer qualified for a prize last time. Read more…

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If you're still wondering what this very strange image is, find out by going to the original WITU challenge post for this week. Have a great weekend, and check back next week for another Where In The Universe Challenge!

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Early Nov. 18th, eyewitnesses reported an explosion in the atmosphere above Colorado, Utah, Wyoming and Idaho in the western United States. Some said the fireball "turned night into day" and produced shock waves that shook the ground when it exploded just after midnight Mountain Standard Time. Infrasound recordings of the blast suggest a small asteroid hitting Earth's atmosphere and exploding with an energy of 0.5 to 1 kiloton of TNT. As the sun rose in the morning, remnants of the explosion were visible as noctilucent clouds over the region. The best video of the extremely bright event was just recently released, from the University of Utah's Eccles Observatory.
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Though the Cassini mission has focused intently on scientific exploration of Saturn and it's moons, data taken by the spacecraft has significantly changed the way astronomers think about the shape of our Solar System. As the Sun and planets travel through space, the bubble in which they reside has been thought to resemble a comet, with a long tail and blunt nose. Recent data from Cassini combined with that of other instruments, shows that the local intertstellar magnetic field shapes the heliosphere differently. Read more…

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While we're on the subject of Saturn…. I came across this video, and it poses — and answers — the interesting question, what would Earth look like if it had rings like Saturn? This animation was done by Roy Prol, and it shows not only how the rings would look from space, but also the view Earthlings would have of the rings. Prol says the ring views from Earth's surface were created according to the location's latitude and the viewer's orientation, and that the size of the rings was calculated respecting the Roche limit for the Earth. A very intriguing concept, and the video is very well done. The only bad thing about Earth having rings is that we probably wouldn't have our Moon, and we wouldn't have just found water on it!

You can read a very old discussion in the BAUT forum on the prospect of Earth having rings.

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The "wow" factor from the Cassini mission never quits. Here's the latest image, released just today of Saturn, viewed in near-infrared. This image was taken with Cassini's wide-angle camera on Oct. 23, 2009 using a spectral filter sensitive to wavelengths of near-infrared light, centered at 890 nanometers. The view was acquired at a distance of approximately 2.6 million kilometers (1.6 million miles) from Saturn. The large shadow south of the equator is from the moon Tethys (1062 kilometers, 660 miles across). The small shadow near the limb of the planet, north of the equator, is the shadow of the moon Mimas (396 kilometers, 246 miles across). Absolutely stunning.

See below for more Cassini goodness of moons playing peek-a-boo with the rings and each other.
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Greetings, fellow SkyWatchers! Yep. The Moon is back, but this weekend can still present some great opportunities for enjoying astronomy. If you're up early or out late? Well, hey… The Leonid meteor shower is still producing activity! Why not take a few minutes to learn about a great variable star you can follow without optical aid or study a new lunar feature? There's plenty to do for binoculars and small telescopes – and perhaps even a clever new study you haven't looked at yet! Whenever you're ready, I'll see you in the dark… Read more…

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If you've ever dreamed of exploring Mars, but are worried about all that pesky radiation exposure and being cramped in a capsule for the two-year flight – or about never coming back – then your dream may be realized with NASA's "Be a Martian" web site. In the spirit of other citizen scientist collaborations such as Galazy Zoo and Stardust@Home, NASA has created a site that allows you to view and categorize images to help map the Martian surface from the safety of your own home here on Earth.

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A little good news for Spirit! The rover successfully moved; not very much, but it's the first step of a planned two-step motion to try and get Spirit free from a sand trap on Mars. On Sol 2090 (Nov. 19), the rover spun its wheels for the equivalent of 2.5 meters (8.2 feet) in the forward direction, and the center of the rover moved approximately 12 millimeters (0.5 inch) forward, 7 millimeters (0.3 inch) to the left and about 4 millimeters (0.2 inch) down. Again, not much, but it's the first good news and good movement the rover has had in months.
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The Large Hadron Collider (LHC) could be re-started on this Saturday morning CERN officials said. Engineers are preparing to send a beam of sub-atomic particles around the 27km-long circular tunnel, which has been shut down since an accident in September 2008. Scientists hope to create conditions similar to those present moments after the Big Bang in search of the elusive Higgs particle to shed light on fundamental questions about the universe.
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Franklin Chang Diaz's proposed VASIMR rocket engine could create very versatile spacecraft. Not only does the plasma-fueled rocket have the potential to make a trip to Mars in just over a month, it could also help clean up space trash in Earth orbit. “Our goal is to be able to have a garbage truck that will be picking up all of these objects at various orbits,” astronaut Chang Diaz said in an article in the Global Post. The debris could put into an “orbital graveyard,” he added, “or we could actually launch them to the sun and drive them to the sun, which is kind of the ultimate, cosmic dump.”
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What would happen if humans could deliberately create a black hole? Well, for starters we might just unlock the ultimate energy source to create the ultimate spacecraft engine — a potential  "black hole-drive" –  to propel ships to the stars.

It turns out black holes are not black at all; they give off "Hawking radiation" that causes them to lose energy (and therefore mass) over time. For large black holes, the amount of radiation produced is miniscule, but very small black holes rapidly turn their mass into a huge amount of energy.
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The major shortcoming of current chemical powered rockets lies in the ratio of payload to fuel. The dream of rocketeers would have a spacecraft almost all payload. Leik Myrabo and John Lewis have an idea for this and they present it in the book "Lightcraft – Flight Handbook LTI-20 ". Within the book lies great detail on a special flying craft and some of its essential subsystems.
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(Editor's note: Ken Kremer is in Florida covering the STS-129 mission for Universe Today)
The astronaut crews for the International Space Station and Space Shuttle Atlantis united as one team in space on Wednesday when Atlantis successfully docked with the ISS at 11:51PM EST. Preluded by some of the most spectacular footage ever of the shuttle "belly flip" or the Rendezvous Pitch Manuaever (RPM), docking occurred in orbital darkness about 220 miles high above earth and directly between Australia and Tasmania. The shuttle astronauts were welcomed aboard the ISS and the jubilant crews exchanged bear hugs, handshakes and high fives inside the Harmony module.

Thursday morning at 9:24 a.m. EST, STS-129 spacewalkers Mike Foreman and Robert Satcher headed outside for the first spacewalk of the mission.
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When the first Landsat Earth-observing satellite launched in 1972, virtually every piece of technology that we think of as essential for viewing, sharing, or analyzing digital images — like the internet or DVD's — either hadn’t been invented or commercialized, like the microprocessors that run desktop computers. “It cost about $4,000 for a single Landsat image, and it takes about 9,000 of them to map the land area of the globe,” said Jeff Masek, from NASA. "To make a global image for just one time period would have cost $36 million." But now, in this age where everything is digital and it's easy to exchange information, anyone can download Landsat images for free. Recently, NASA and the U.S. Geological Survey put the finishing touches on a new collection of mapped images covering the entire land surface of the Earth. However, if you want the entire full-size version, it would be as big as the Hoover Dam.
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