2013: The Year in Space (52 images)

Top photos of 2013 for the year in space news and exploration.
Updated: Dec. 23, 2013 at 11:37 AM
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Expedition 35 Flight Engineer Chris Cassidy, who currently is living and working aboard the International Space Station, is captured in a close-up image in the Quest Airlock prior to a spacewalk in May, 2013. UPI/NASA
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