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An astronaut on the moon sitting on a rock using a laptop

An astronaut on the moon sitting on a rock using a laptop

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Astronaut Floating In Space

Astronaut Floating In Space

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American astronaut Joseph Tanner waves to the camera during a space walk as part of the STS-115 mission to the International Space Station, September 2006. (Photo by NASA/Getty Images)

American astronaut Joseph Tanner waves to the camera during a space walk as part of the STS-115 mission to the International Space Station, September 2006. (Photo by NASA/Getty Images)

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Astronaut walking on Mars

Astronaut walking on Mars

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astronaut sitting on couch watching TV

astronaut sitting on couch watching TV