Titan's 'Great Lake'
Scientists believe that several dark features near Titan's north pole are lakes that are most likely filled with liquid gases, ethane or methane. The two gases are the primary components of what Earthlings call natural gas. One lake appears to be bigger than the largest of the Great Lakes on Earth, Lake Superior.
March 14, 2007 5:33 AM PDT
Photo by: NASA/JPL/GSFC
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