2013: Year in Space (31 images)

A look back on the years's launches, space explorations and discoveries.
Updated: Oct. 21, 2013 at 2:01 PM
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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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