What Defines a Planet?

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NASA Weathers Departure, Rumors of Budget Cuts

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The Tricks and Troubles of Sleeping in Space

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Florida's 'Space Coast' Looks Beyond the Shuttle

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Sensing the Atmosphere of Distant Planets

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Science Fiction Author Clarke Dies at 90

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Arizona Telescope Sees Deep into the Cosmos

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Cassini to Capture Clues from Saturn's Icy Moon

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Candidates' Views Differ on Space Exploration

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Open-Source Crowd Shoots for the Moon

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