NASA astronaut David Hilmers, right, assists European Space Agency astronaut German Ulf Merbold with the visual stimulator experiment aboard the Space Shuttle Discovery mission STS-42 January 23, 1992 in Earth Orbit.
NASA astronaut David Hilmers, right, assists European Space Agency astronaut German Ulf Merbold with the visual stimulator experiment aboard the Space Shuttle Discovery mission STS-42 January 23, 1992 in Earth Orbit.
Size: 5150px × 3372px
Location: Earth Orbit
Photo credit: © NASA Photo / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: american, astronaut, astronauts, esa, experiment, exploration, german, indoors, male, man, medical, mission, nasa, research, science, space, sts42, vertical, weightlessness, work
