Plutonium Shortage Could Stall Space Exploration
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The moon is generally thought to be a dry place, and the discovery of water on its surface comes as an unexpected — and exciting — surprise for researchers. Carolina K. Smith/iStockphoto.com hide caption

toggle caption Carolina K. Smith/iStockphoto.com
Surprise! Water Found On Moon's Surface
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Comet's Dust Holds Basic Ingredients Of Life
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This radar image taken by Cassini in July 2006 of Titan, one of Saturn's moons, provides convincing evidence that it is covered by large bodies of liquid. NASA/JPL/Space Science Institute hide caption

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Exploring A Moon By Boat
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Traveling To Mars On A One-Way Ticket
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This 'butterfly' nebula was captured with Hubble's newly updated imaging. NASA hide caption

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Souped-Up Hubble Makes A Comeback
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Space Panel: Exploration Requires Bigger Budget
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400 Years After Galileo, Astronomy's New Golden Age
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Expert Panel To Advise Obama On Spaceflight
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Should Humans Return To The Moon?
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Jovian Impact A Lucky Strike For Science
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Australian Spies Giant Hole On Jupiter's South Pole
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Despite Glitches, India Shoots For The Moon
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