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After Loss of Lunar Orbiter, India Looks to Mars Mission |
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Written by Nancy Atkinson
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Tuesday, 01 September 2009 |
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After giving up on re-establishing contact with the Chandrayaan-1 lunar orbiter, Indian Space Research Organization (ISRO) Chairman G. Madhavan Nair announced the space agency hopes to launch its first mission to Mars sometime between 2013 and 2015. Nair said the termination of Chandrayaan-1, although sad, is not a setback and India will move ahead with its plans for the Chandrayaan-2 mission to land an unmanned rover on the moon’s surface to prospect for chemicals, and in four to six years launch a robotic mission to Mars.
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Astronomers Find Coldest, Driest, Calmest Place On Earth |
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Written by ScienceDaily
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Tuesday, 01 September 2009 |
The high, flat, and cold environment of the Antarctic Plateau at Dome C, one of the areas that astronomers have identified recently as a possible location for a future observatory. (Credit: Stephen Hudson / Courtesy of Wikimedia Commons) ScienceDaily (Sep. 1, 2009) — The search for the best observatory site in the world has lead to the discovery of what is thought to be the coldest, driest, calmest place on Earth. No human is thought to have ever been there but it is expected to yield images of the heavens three times sharper than any ever taken from the ground. The joint US-Australian research team combined data from satellites, ground stations and climate models in a study to assess the many factors that affect astronomy – cloud cover, temperature, sky-brightness, water vapour, wind speeds and atmospheric turbulence. The researchers pinpointed a site, known simply as Ridge A, that is 4,053m high up on the Antarctic Plateau. It is not only particularly remote but extremely cold and dry. The study revealed that Ridge A has an average winter temperature of minus 70ºC and that the water content of the entire atmosphere there is sometimes less than the thickness of a human hair |
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Is The Milky Way Doomed To Be Destroyed By Galactic Bombardment? Probably Not, Study Says |
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Written by ScienceDaily
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Tuesday, 01 September 2009 |
This image from a supercomputer simulation shows the density of dark matter in our Milky Way galaxy which is known to contain an ancient thin disk of stars. Brightness (blue-to-violet-to-red-to-yellow) corresponds to increasing concentration of dark matter. The bright central region corresponds roughly to the Milky Way's luminous matter of gas and stars and the bright clumps indicate dark-matter satellites orbiting our Milky Way galaxy which are known as "substructure". The simulation predicts that the dark-matter halos of spiral galaxies are lumpy, filled with hundreds of dark matter substructures that pass through the stellar disks of galaxies, leaving their imprint and disturbing them in the process. (Credit: Image courtesy of Stelios Kazantzidis, Ohio State University) ScienceDaily (Aug. 31, 2009) — As scientists attempt to learn more about how galaxies evolve, an open question has been whether collisions with our dwarf galactic neighbors will one day tear apart the disk of the Milky Way.
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