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Sarah preps for flights on SOFIA
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Results from a big sidewalk astronomy event in Philadelphia
06/05/2013 ---
American Astronomical Society meeting: The last full day
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Tuesday at the American Astronomical Society conference
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Comets and the distance scale of the solar system
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Memories of Comet West: an excerpt from my upcoming book
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Amateur astronomer captures gravitational streamers from galaxy
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A great new book: Sun Kwok’s "Stardust"
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The Tunguska event: an excerpt from my upcoming book
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