NASA STS-122 mission prime crew astronaut Rex Walheim works on the International Space Station during an extravehicular activity spacewalk February 13, 2008 in Earth orbit. (photo by NASA Photo via Planetpix)

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Photo credit: © NASA Photo / Alamy / Afripics
License: Licensed
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Keywords: activity, astronaut, atlantis, crew, earth, eva, exploration, extravehicular, international, iss, mission, nasa, orbit, orbiting, prime, rex, science, shuttle, space, spacecraft, spacewalk, station, sts-122, technology, vertical, walheim