This 2010 artist's rendering depicts NASA's Juno spacecraft with Jupiter in the background. The robotic explorer Juno is set to become the most distant probe ever powered by the sun. Launch is set for... more 
This 2010 artist's rendering depicts NASA's Juno spacecraft with Jupiter in the background. The robotic explorer Juno is set to become the most distant probe ever powered by the sun. Launch is set for Friday, Aug. 5, 2011, aboard an unmanned Atlas V rocket _ barely two weeks after NASA's final space shuttle flight. (AP Photo/NASA/JPL) less 
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Associated Press | Photo By NASA/JPL
Mon, Aug 1, 2011 1:26 PM EDT