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Tuesday, November 10, 2009 |
Tuesday, November 10, 2009 |
Photo: "Gravity Tractor," Super Telescopes Enlisted to Battle Killer AsteroidsA massive spaceship that would act as a "gravity tractor" and two upcoming telescope projects were among the slate of new proposals for addressing the asteroid menace presented today at a scientific conference. Image by Don Davis, courtesy NASA
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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