page_title: Stephen Bowen (astronaut)
section_title: NASA career
hierarchical_section_title: Stephen Bowen (astronaut) / NASA career
caption_attribution_description: English: Astronaut Steve Bowen, STS-126 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 57-minute spacewalk, Bowen and astronaut Heidemarie Stefanyshyn-Piper (out of frame), mission specialist, focused their efforts on the continued cleaning of the station's starboard solar alpha rotary joint (SARJ) and the removal and replacement of trundle bearing assemblies (TBA). Bowen and Piper also cleaned the area around the SARJ's drive lock assemblies, which help the joint to rotate and lock into place. Earth's horizon and the blackness of space provide the backdrop for the scene.
context_page_description: Stephen Gerard "Steve" Bowen is a United States Navy submariner and a NASA astronaut; he was the second submariner to travel into space. Bowen has been on three spaceflights, all of which were Space Shuttle missions to the International Space Station. His first mission, STS-126, took place in November 2008, and his second was STS-132 in May 2010.
  In March 2011, Bowen completed his third spaceflight as a Mission Specialist on STS-133, which was Space Shuttle Discovery's final planned flight. Having flown on both STS-132 and STS-133, Bowen became the first and only astronaut to fly on consecutive shuttle missions. Originally Tim Kopra was scheduled to fly on STS-133, but Kopra had a bicycle injury shortly before the mission, and so he was replaced by Bowen.
context_section_description: Bowen is the first Submarine Officer selected by NASA. He was selected as an astronaut candidate in July 2000, as one of NASA's Astronaut Group 18. He reported for training at the Johnson Space Center in August 2000. Following the completion of two years of training and evaluation, he was initially assigned technical duties in the Astronaut Office Station Operations Branch while awaiting assignment to a Shuttle flight as a Mission Specialist. Bowen was originally assigned to STS-124 but was moved to a later flight to allow the Shuttle to rotate an ISS crew member.
caption: Bowen participating in the third EVA of STS-126.
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