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Big Dipper “Star” Actually a Sextuplet System

kdawson — Fri, 11 Dec 2009 17:48:00 +0000

Theosis sends word that an astronomer at the University of Rochester and his colleagues have made the surprise discovery that Alcor, one of the brightest stars in the Big Dipper, is actually two stars; and it is apparently gravitationally bound to the four-star Mizar system, making the whole group a sextuplet. This would make the Mizar-Alcor sextuplet the second-nearest such system known. The discovery is especially surprising because Alcor is one of the most studied stars in the sky. The Mizar-Alcor system has been involved in many "firsts" in the history of astronomy: "Benedetto Castelli, Galileo's protege and collaborator, first observed with a telescope that Mizar was not a single star in 1617, and Galileo observed it a week after hearing about this from Castelli, and noted it in his notebooks... Those two stars, called Mizar A and Mizar B, together with Alcor, in 1857 became the first binary stars ever photographed through a telescope. In 1890, Mizar A was discovered to itself be a binary, being the first binary to be discovered using spectroscopy. In 1908, spectroscopy revealed that Mizar B was also a pair of stars, making the group the first-known quintuple star system."

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Russia Confirms Failed Missile Launch Caused Norway’s Light Show

timothy — Fri, 11 Dec 2009 04:30:00 +0000

Ch_Omega writes "According to this article over at BarentsObserver, the giant spiral seen on the sky over Norway Wednesday morning local time has been confirmed to be the result of a failed Russian missile launch. Russia now confirms that '...the missile was launched from submerged position in the White Sea by the nuclear submarine Dmitri Donskoy. Studies of the telemetric data from the launch show that the two first stages of the missile functioned as they should, and that a technical malfunctioning occurred during the third stage.' There is also an article on this at The Daily Mail."

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Virgin Galactic Unveils SpaceShipTwo

ScuttleMonkey — Mon, 07 Dec 2009 19:16:00 +0000

RobGoldsmith writes to tell us that Virgin Galactic has unveiled their latest take on manned space travel for the immediate future: SpaceShipTwo. The craft comes complete with matching mothership, WhiteKnightTwo, and will be officially unveiled today in the Mojave Desert just after dark. "Subject to certain US regulatory requirements that will guide the unveiling, SS2 will be attached to her WK2 mothership which was last year unveiled and named EVE after Sir Richard Branson's mother. In the future, WK2 will carry SS2 to above 50,000 feet (16 kilometers) before the spaceship is dropped and fires her rocket motor to launch into space from that altitude. In honor of a long tradition of using the word Enterprise in the naming of Royal Navy, US Navy, NASA vehicles and even science fiction spacecraft, Governor Schwarzenegger of California and Governor Richardson of New Mexico will today christen SS2 with the name Virgin Space Ship (VSS) ENTERPRISE. This represents not only an acknowledgment to that name’s honorable past but also looks to the future of the role of private enterprise in the development of the exploration, industrialization and human habitation of space."

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What Drugs Do Astronauts Take?

Soulskill — Sat, 05 Dec 2009 10:11:00 +0000

astroengine writes "Science fiction is stuffed full of examples of pill-popping space explorers and aliens enjoying psychedelic highs. After all, space is big; it can get boring/scary/crazy up there. It's little wonder, then, that our current space explorers consume a cocktail of uppers, downers, tranquilizers and alcohol to get the job done. Robert Lamb on tranquilizers in the space station: 'Sure, it hardly makes for a civilized evening aboard ISS, but it beats someone blowing the hatch because they think they saw something crawling on one of the solar panels.'"

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SETI@Home Install Leads To School Tech Supervisor’s Resignation

timothy — Wed, 02 Dec 2009 20:40:00 +0000

An anonymous reader writes "Apparently the most prolific of users in the SETI@Home community has resigned his job as a school technology supervisor after it was revealed he had the software installed on some 5000 school machines. The school claims to have lost $1 million in upkeep on the affected machines."

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New Aluminum-Ice Rocket Propellent Tested

CmdrTaco — Mon, 30 Nov 2009 15:06:00 +0000

eldavojohn writes "With the problem of moving conventional rocket fuel to the moon and mars on their minds, researchers from Purdue and Penn State successfully tested and demonstrated the use of aluminum-ice (ALICE) as fuel. In a paper from last August they outlined how it would work [PDF] and now they know it does. Space.com also had more information on the paper and how nano-scale aluminum functions as a fuel."

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Herschel Spectroscopy of Future Supernova

Soulskill — Sat, 28 Nov 2009 17:50:00 +0000

davecl writes "ESA's Herschel Space Telescope has released its first spectroscopic results. These include observations of VYCMa, a star 50 times as massive as the sun and soon to become a supernova, as well a nearby galaxy, more distant colliding starburst galaxies and a comet in our own solar system. The spectra show more lines than have ever been seen in these objects in the far-infrared and will allow astronomers to work out the detailed chemistry and physics behind star and planet formation as well as the last stages of stellar evolution before VYCMa's eventual collapse into a supernova. More coverage is available at the Herschel Mission Blog, which I run."

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Cassini Captures Saturn’s Northern Lights

Soulskill — Sat, 28 Nov 2009 00:26:00 +0000

al0ha writes "In the first video showing the auroras above the northern latitudes of Saturn, Cassini has spotted the tallest known 'northern lights' in the solar system, flickering in shape and brightness high above the ringed planet. The new video reveals changes in Saturn's aurora every few minutes, in high resolution, with three dimensions. The images show a previously unseen vertical profile to the auroras, which ripple in the video like tall curtains. These curtains reach more than 1,200 kilometers (750 miles) above the edge of the planet's northern hemisphere."

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Astronomers Invent “Galaxy Game”

timothy — Wed, 25 Nov 2009 20:58:00 +0000

Hugh Pickens writes "BBC reports that astronomers have invented a game to help uncover the basis of galactic collisions, showing players images of colliding galaxies and asking them to match those to simulations. These galactic mergers could be the key to why the Universe contains a mixture of different galaxies — some with trailing spiral arms, others more like compact balls of stars. Astronomers say that humans are 'much better than computers' at spotting the patterns and similarities. 'The strength of the game is that it takes results from many people,' says Dr Chris Lintott from Oxford University, one of the members of the Galaxy Zoo team. The developers describe the game as a 'cosmic fruit machine' (i.e., slot machine). The game shows players one real galaxy image and, on command, eight randomly selected simulations pop into the 'slot'" surrounding that image. The aim is for players to choose the simulations that look most similar to the real galaxy and take those through to the next round to examine them further. The simulated images show the different aspects of galaxy formation, so as people play, they will generate data that will help astronomers understand these collisions. 'These collisions take millions of years to unfold,' says Anthony Holincheck, a graduate student at George Mason University and another member of the team. 'All we get from the Universe is a single snapshot of each one. [With] simulations, we will be able to watch each cosmic car crash unfold in the computer.'"

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New Theory of Gravity Decouples Space & Time

kdawson — Tue, 24 Nov 2009 20:55:00 +0000

eldavojohn writes "Petr Horava, a physicist at the University of California in Berkeley, has a new theory about gravity and spacetime. At high energies, it actually snips any ties between space and time, yet at low energies devolves to equivalence with the theory of General Relativity, which binds them together. The theory is gaining popularity with physicists because it fits some observations better than Einstein's or Newton's solutions. It better predicts the movement of the planets (in an idealized case) and has a potential to create the illusion of dark matter. Another physicist calculated that under Horava Gravity, our universe would experience not a Big Bang but a Big Bounce — and the new theory reproduces the ripples from such an event in a way that matches measurements of the cosmic microwave background."

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