This artist's conception provided by NASA/Jet Propulsion Laboratory-Caltech shows a newly discovered type of planet that wanders freely or follows very loose orbits. Astronomers have the mysterious ... more 
This artist's conception provided by NASA/Jet Propulsion Laboratory-Caltech shows a newly discovered type of planet that wanders freely or follows very loose orbits. Astronomers have the mysterious denizens of the Milky Way are apparently as common as the stars. One expert called the discovery a huge surprise. less 
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Associated Press | Photo By NASA JPL-Caltech
Wed, May 18, 2011 3:06 PM EDT