2012: The year in space (36 images)

From Solar storms to the retiring of the Shuttles "Atlantis" and "Discovery", this constantly updated collection features the top space news photos of 2012.
Updated: Dec. 20, 2012 at 10:58 AM
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This undated NASA image taken by the Cassini spacecraft shows two of Saturn's moons, Rhea in foreground and Titan. UPI/NASA
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