Cosmology
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How to find a black hole 7-11-2009 Black holes. Just the name evokes mystery and intrigue. But do they really exist? Scientists have discovered at least 20 objects in 20 different galaxies that are potential black holes and may contain event horizons. A black hole may even be at the center of the Milky Way Galaxy. |
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Rogue Black Holes May Roam the Milky Way 6-11-2009 It sounds like the plot of a sci-fi movie: rogue black holes roaming our galaxy, threatening to swallow anything that gets too close. In fact, new calculations by Ryan O'Leary and Avi Loeb suggest that ... |
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Hubble Witnesses Spectacular Flaring in Gas Jet from M87's Black Hole 2-11-2009 These images taken in ultraviolet light by NASA's Hubble Space Telescope reveal the brightening of a jet of gas blasting from the core of the gigantic elliptical galaxy M87. |
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Active Galaxies Flare and Fade in Fermi Telescope All-Sky Movie 30-10-2009 The gamma-ray sky comes alive in a movie made from data acquired by NASA’s Fermi Gamma-ray Space Telescope during its first three months of operations. |
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Erratic black holes regulate their growth 13-10-2009 New results from NASA's Chandra X-ray Observatory have made a major advance in explaining how a special class of black holes may shut off the high-speed jets they produce. These results suggest that these black holes have a mechanism for regulating the rate at which they grow. |
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Heavyweight galaxies puzzle astronomers 3-10-2009 Astronomers have discovered large galaxies some two thirds of the way back in time to the big bang. This surprising find casts doubt on theories of how the biggest galaxies form. |
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After the collapse: Scientists observe the largest exploding star yet seen 13-10-2009 Archival photographs from NASA's Hubble Space Telescope have been used to uncover the progenitor star to a supernova that exploded in 2005. To the surprise of astronomers, the progenitor is a rare class of ultra-bright star... |
