This artist's conception illustrates a giant planet floating freely without a parent star. Astronomers recently uncovered evidence for such lone worlds, thought to have been booted from developing ... more 
This artist's conception illustrates a giant planet floating freely without a parent star. Astronomers recently uncovered evidence for such lone worlds, thought to have been booted from developing star systems. The sun may have captured such a less 
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SPACE.com | Photo By NASA/JPL-Caltech
Fri, Mar 28, 2014 7:30 AM EDT