NASA astronaut Nichole Ayers works on an experimental carbon dioxide removal device

Cosmonaut Aleksey Leonov displays drawing of Astronaut Thomas Stafford

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Astronaut Don Pettit inserts research hardware into the Combustion Integrated Rack

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Expedition 71 Astronauts Speak with U.S. Senate Youth Program

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Astronaut Nick Hague Attends Joint Base Andrews Air Show

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NASA astronaut Zena Cardman opens the hatch to the Cygnus XL cargo craft

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Astronauts Michael Foale and Jerry Linenger training with Russian Orlan suit

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Expedition 18 crew member and JAXA astronaut Soichi Noguchi

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NASA astronaut Zena Cardman processes bone stem cell samples

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NASA astronaut Mike Fincke smiles works on the Droplets fluid physics investigation

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NASA astronauts Don Pettit and Nick Hague at the controls of the robotics workstation

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Astronaut Suni Williams checks out the Astrobee robotic free-flyer

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Astronaut Scott Carpenter in Hangar S crew quarters during suiting activity

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Astronaut Ed Lu prepares for ISS Expedition Seven mission.

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Astronaut Jones donning EMU during space walk simulations for STS-59

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NASA astronaut Jonny Kim practices Canadarm2 robotic maneuvers at the robotics workstation

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Astronaut Butch Wilmore installs science hardware inside the Destiny laboratory module

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Astronaut Alan B. Shepard has his blood pressure and temperature checked

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View of STS-121 Astronauts shadows during EVA 1

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GEMINI-TITAN (GT)-9 TEST - ASTRONAUT BEAN, ALAN - KSC

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Astronaut Don Pettit swaps samples of materials to observe how they burn in weightlessness

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STS-133 crew training with replacement astronaut Steve Bowen

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Astronaut Paul Weitz works with UV Stellar Astronomy Experiment

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Astronaut Kenneth D. Bowersox during emergency egress training

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NASA astronaut Zena Cardman works inside the Quest airlock

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