Astronaut_Mike_Hopkins_on_Dec._24_Spacewalk.jpg

Summary

Description	English: On Dec. 24, 2013, NASA astronaut Mike Hopkins, Expedition 38 Flight Engineer, participates in the second of two spacewalks, spread over a four-day period, which were designed to allow the crew to change out a degraded pump module on the exterior of the Earth-orbiting International Space Station. He was joined on both spacewalks by NASA astronaut Rick Mastracchio, whose image shows up in Hopkins' helmet visor. The pump module controls the flow of ammonia through cooling loops and radiators outside the space station, and, combined with water-based cooling loops inside the station, removes excess heat into the vacuum of space.
Date	24 December 2013, 12:38:55
Source	http://www.nasa.gov/content/astronaut-mike-hopkins-on-dec-24-spacewalk/#.Ur3p8Oig5w0
Author	NASA

This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS038-E-020234 .

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