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A comment on Teens Photograph Lego Minifigure at Edge of Space for $400. Parent comment

Re:Teens Photograph Lego Minifigure at Edge of Space for $400 by mistermann on Saturday January 28, 2012 @12:51AM (#3521445)
>The problem with getting into space is you need to get 10 miles then go another 200 miles up and accelerate to mach 22.

Can you expand on this? (Especially about the Mach 22)

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Re:Teens Photograph Lego Minifigure at Edge of Space for $400 by szany on Saturday January 28, 2012 @06:06AM (#3521816)
http://www.wolframalpha.com/input/?i=orbital+velocity+of+ISS...
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