An artist's rendition of XCOR Aerospace's Lynx space plane high above the Earth. Roughly the size of a small private airplane, the craft is designed to make several flights a day into a zero-gravity ... more 
An artist's rendition of XCOR Aerospace's Lynx space plane high above the Earth. Roughly the size of a small private airplane, the craft is designed to make several flights a day into a zero-gravity environment. less 
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SPACE.com | Photo By Mike Massee/XCOR
Fri, Jun 8, 2012 12:24 PM EDT