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Albert Einstein’s revolutionary general theory of relativity describes gravity as a curvature in the fabric of spacetime. Mathematicians at University of California, Davis have come up with a new way to crinkle that fabric while pondering shockwaves.
“We show that spacetime cannot be locally flat at a point where two shockwaves collide,” says Blake Temple, professor of mathematics at UC Davis. “This is a new kind of singularity in general relativity.” (...)
Read the rest of A Crinkle in the Wrinkle of Space-time (634 words)
© John Williams for Universe Today, 2012. | Permalink | 3 comments |
Post tags: Big Bang, Blake Temple, Davis, general theory of relativity, Moritz Reintjes, Proceedings of the Royal Society A, regularity singularity, spacetime, University of California, Zeke Vogler
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Video Caption: Star Trek's Captain Kirk, actor William Shatner, guides viewers through the video titled, “Grand Entrance,” showing NASA's Curiosity Mars Science Lab mission from atmospheroic entry through descent, and after landing on the Red Planet on August 6 2012. As NASA engineers and scientists make final preparations for the Red Planet landing of NASA's most difficult planetary science mission to date – the Curiosity Mars Science Lab - inside Gale Crater on the night of August 5/6, Star Trek actors William Shatner and Wil Wheaton lend their voices to a pair of new mission videos titled "Grand Entrance" The video duet describes the thrilling story of how Curiosity will touch down on Mars and guides viewers through the nail biting "7 Minutes of Terror" – from entry into the Martian atmosphere at over 13,000 MPH and then how the rover must slow down through descent, set down for a soft and safe landing and ultimately how Curiosity will search for signs of life.(...)
Read the rest of Curiosity's Grand Entrance with Star Trek’s William Shatner and Wil Wheaton – Video Duet (249 words)
© Ken Kremer for Universe Today, 2012. | Permalink | 4 comments |
Post tags: Captain Kirk, Curiosity, Curiosity Rover, Gale crater, Mars, Mount Sharp, Star Trek, william shatner
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Remember that moment in the movie Star Trek (2009) when James T. Kirk, Hikaru Sulu and the red-shirted Engineer Olson don spacesuits, and free-style plummet from orbit to a giant machine threatening the planet below? For those who didn’t see it: We hate to ruin the surprise for you, but … Olson didn’t make it. It was an homage to an old joke stemming from Star Trek‘s original series (1966-69). In that show, anonymous crew members in red shirts frequently died to demonstrate how risky a certain voyage was to the main cast. How statistically accurate is that assertion of red shirts dying more often than others? One Star Trek geek – who happens to deal in analytics for a living – put it to the test.(...)
Read the rest of Red-Shirt Risk: How Likely Is It That You’ll Die? (186 words)
© Elizabeth Howell for Universe Today, 2012. | Permalink | 4 comments |
Post tags: Analytics, Red Shirts, Star Trek, Statistics
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Image Caption: Course correcting thruster firings on July 29 successfully placed Curiosity on target to touchdown beside Mount Sharp inside Gale Crater on Mars on Aug 6 in search of signs of a habitable environment. Credit: NASA
Now just 1 week out from landing beside a 3 mile high (5 km) layered Martian mountain in search of life's ingredients, aiming thrusters aboard the cruise stage of NASA's car sized Curiosity Mars Science Lab successfully fired to set the rover precisely on course for a touchdown on Mars at about 1:31 a.m. EDT (531 GMT) early on Aug. 6 (10:31 p.m. PDT on Aug. 5). Two precise and brief thruster bursts lasting about 7 seconds were successfully carried out just hours ago earlier today at 1 a.m. on July 29, EDT (10 p.m. PDT on July 28). The effect was to change the spacecraft’s velocity by about 1/40 MPH or 1 cm/sec as it smashes into Mars at about 13,200 mph (5,900 meters per second). (...)
Read the rest of Curiosity Completes Crucial Course Correction – 1 Week from Mars ! (553 words)
© Ken Kremer for Universe Today, 2012. | Permalink | 8 comments |
Post tags: Curiosity, Curiosity Rover, EDL, Gale crater, Mars, Mars Rovers, Mount Sharp, MSL, NASA, Search for Life
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A Russian Progress supply ship has been successfully re-docked to the International Space Station after an initial re-docking failed. The ship has been at the station since April and it was undocked on July 22 to perform a series of engineering tests during re-docking to make sure an upgraded automated rendezvous system was working. However, the new Kurs rendezvous system, Kurs-NA, failed and the re-docking was aborted. After directing the ship to move to a safe distance away from the ISS, engineers assessed the problems, and then successfully completed the re-docking on July 28.
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Read the rest of Progress Supply Ship Re-docks to ISS After Abort (119 words)
© nancy for Universe Today, 2012. | Permalink | One comment |
Post tags: Progress Resupply Ship, Space Flight, Space Station
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In 2011, America lost the ability to send humans into space when NASA retired the shuttle program. Lately, there has been a burst of news about the commercial side of spaceflight and how private companies such as SpaceX and VirginGalatic will soon be able to take over where the shuttle left off. But that doesn't mean NASA has given up the ability to send people into space forever and recently the agency has taken a few steps toward regaining that ability. (...)
Read the rest of NASA Making Strides with the New Space Launch System (523 words)
© Andy Tomaswick for Universe Today, 2012. | Permalink | 17 comments |
Post tags: NASA, Space Launch System (SLS)
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If you can’t get to a Mars Science Lab landing party, one website aims to bring the party to you. Explore Mars, a not-for-profit, has joined up with several space-faring organizations and firms to create Get Curious. It’s a one-stop shop for all things concerning Curiosity, the centerpiece of MSL. “Curiosity will rock the world” proclaims an all-caps banner at the top of the website as an animated picture of Curiosity dangles beneath a jetting shell.(...)
Read the rest of The Most Epic Curiosity Countdown Clock (306 words)
© Elizabeth Howell for Universe Today, 2012. | Permalink | No comment |
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Image Caption: NASA's Mars Odyssey will relay near real time signals of this artist’s concept depicting the moment that NASA’s Curiosity rover touches down onto the Martian surface. NASA's Mars Reconnaissance Orbiter (MRO) and ESA's Mars Express (MEX) orbiter will also record signals from Curiosity for later playback, not in real time. Credit: NASA
It's now just T minus 9 Days to the most difficult and complex Planetary science mission NASA has ever attempted ! The potential payoff is huge – Curiosity will search for signs of Martian life The key NASA orbiter at Mars required to transmit radio signals of a near real-time confirmation of the August 5/6 Sunday night landing of NASA's car sized Curiosity Mars Science Lab (MSL) rover is now successfully in place, and just in the nick of time, following a successful thruster firing on July 24. Odyssey will transmit the key signals from Curiosity as she plunges into the Martian atmosphere at over 13,000 MPH (21,000 KPH) to begin the harrowing "7 Minutes of Terror" known as "Entry, Descent and Landing" or EDL – all of which is preprogrammed !
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Read the rest of T Minus 9 Days – Mars Orbiters Now in Place to Relay Critical Curiosity Landing Signals (426 words)
© Ken Kremer for Universe Today, 2012. | Permalink | 14 comments |
Post tags: Curiosity, Curiosity Rover, esa, Mars, Mars Express, Mars Odyssey, Mars Rovers, MSL, NASA, Search for Life
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