Astronaut Ed White became the first American to step into space on June 3, 1965. (Photo: NASA.GOV)
Astronaut James H. Newman waves during a spacewalk preparing for release of the first combined elements of the International Space Station. (Photo: NASA.GOV)
On December 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 faulty water pump on the exterior of
Launched from Kennedy Space Center on February 11, 1997, STS-82 was the second mission intended to service the Hubble Space Telescope. (Photo: NASA.GOV)
Backdropped by New Zealand and Cook Strait in the Pacific Ocean, astronaut Robert L. Curbeam Jr. (left) and European Space Agency (ESA) astronaut Christer Fuglesang, both STS-116 mission specialists, participate in the mission's first of three
On October 7, NASA astronaut Reid Wiseman and European Space Agency astronaut Alexander Gerst completed the first of three spacewalks for the Expedition 41 crew aboard the International Space Station. (Photo: NASA.GOV)
NASA astronaut Barry Wilmore works outside the International Space Station on the first of three spacewalks preparing the station for future arrivals by U.S. commercial crew spacecraft, Saturday, February 21, 2015. (Photo: NASA.GOV)
NASA astronaut Terry Virts is pictured here on a spacewalk as the Earth's surface passes by in the background. Virts and fellow astronaut Barry "Butch" Wilmore were routing hundreds of feet of cable as part of a reconfiguration of the International
On Sunday, March 1, Expedition 42 Flight Engineer Terry Virts and Commander Barry "Butch" Wilmore ventured outside the International Space Station for their third spacewalk in eight days. (Photo: NASA.GOV)
U.S. astronaut Terry Virts tweeted this image on Mar. 1, 2015, and asked this question: "Can you spot the space walker in this picture? He's very small compared to the enormous starboard truss of the #ISS." Terry is a flight engineer on the
U.S. astronaut Terry Virts tweeted his followers this image after completing a series of spacewalks with his partner astronaut Barry "Butch" Wilmore. (Photo: NASA.GOV)