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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A Martian dust twister is shown tearing across the planet in this photo by NASA's Mars Reconnaissance Orbiter on February 16, 2012, just released. The twister rises up more than a half mile high in the Amazonis Planitia region of northern Mars. The dust devil is 100 feet wide. Dust devils occur on both Earth and Mars. UPI/NASA
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