A National Science Foundation artist's drawing shows the inner four planets orbiting Gliese 581, a red dwarf star just 20 light-years from Earth. The newly discovered planet, in the foreground, has a 37-day orbit and, like Earth, is distant enough from the star for liquid water to exist. Lynette Cook hide caption

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'Goldilocks' Planet's Temperature Just Right For Life

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Does The Universe Have a 'Dark Flow?'

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This artist's rendering shows two Saturn-size planets discovered by NASA's Kepler telescope. Scientists say there is evidence of a third planet, a much smaller one, whose diameter appears to be about 50 percent larger than Earth's. NASA hide caption

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Astronomers Identify Two New Solar Systems

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Images Show A Shrinking Moon

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Astronauts To Conduct Third Spacewalk To Fix Pump

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SETI Throws A Party

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Astronauts will spacewalk on Wednesday in an attempt to fix a broken cooling pump aboard the International Space Station. Though a second pump is currently working, NASA officials are worried about the possibility of it shutting down before the broken pump is fixed. NASA hide caption

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NASA Schedules Spacewalk To Fix Broken Pump

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'Packing For Mars' And The Weightless Life

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The satellite arrives as a box of little pieces you can configure any way you wish. Alex Antunes hide caption

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DIY Satellites Let You Find Your Own Space

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Biggest Star Still Managed To Hide Until Just Now

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One More Ride On The Space Shuttle (Simulator)

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