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  5. Youre going very fast when youre on orbit, going around the ...

You're going very fast when you're on orbit, going around the world once every hour and a half.

Robert Crippen
Orbit, Half, World
"STS-1 25th Anniversary Interview with Bob Crippen". Interview with George Diller, www.nasa.gov. April 12, 2006.
You're going very fast when you're on orbit, going around the world once every hour and a half.