A Quarter of Sun-Like Stars Host Earth-Size Worlds
astroengine writes "Although there appears to be a mysterious dearth of exoplanets smaller than Earth, astronomers using data from NASA's Kepler space telescope have estimated that nearly a quarter of all sun-like stars in our galaxy play host to worlds 1-3 times the size of our planet. These astonishing results were discussed by Geoff Marcy, professor of astronomy at the University of California, Berkeley, during a talk the W. M. Keck Observatory 20th Anniversary Science Meeting on Thursday. '23 percent of sun-like stars have a planet within (1-2.8 Earth radii) just within Mercury's orbit,' said Marcy. 'I'll say that again, because that number really surprised me: 23 percent of sun-like stars have a nearly-Earth-sized planet orbiting in tight orbits within 0.25 AU of the host stars.'"
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Observatory: An Asteroid’s Fast, Fiery Introduction to Earth
The fast-moving fireball seen over Nevada and California in April was a small asteroid from the inner region of the asteroid belt between Jupiter and Mars, scientists have concluded.
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Space Shuttle Endeavor Lands In Los Angeles After Final Flight
Today the space shuttle Endeavor completed its final ferry flight, landing in Los Angeles, California after leaving Edwards Air Force Base earlier today. The shuttle will now undergo preparations for its journey through the streets of L.A. (at a cost of 400+ trees) to its final resting place at the California Science Center. It'll go on public display October 30. Endeavor spent over 296 days in space throughout 25 missions, comprising 4,671 orbits that added up to over 197 million kilometers of travel. Slashdot's own Kaushik Acharya was at the Griffith Observatory in L.A. for the flyover, and he provided some great pictures of Endeavor's passing.
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Observatory: Seal Tagging Yields Huge Set of Data in Northeastern Pacific
Tagging has yielded an enormous amount of information about feeding, migration and birth patterns of female elephant seals off the Northern California coast.
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