This undated image released by NASA shows an artist rendering of the Juno spacecraft circling Jupiter. The spacecraft planned to fire its engine on Aug. 30, 2012, the first of two engine burns to set ... more 
This undated image released by NASA shows an artist rendering of the Juno spacecraft circling Jupiter. The spacecraft planned to fire its engine on Aug. 30, 2012, the first of two engine burns to set it up for an Earth gravity assist next year. It's due to arrive at Jupiter in 2016. (AP Photo/NASA) less 
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Associated Press | Photo By NASA
Thu, Aug 30, 2012 1:51 PM EDT