lakes of methane have been spotted on saturn's largest moon. titan. boosting the the theory that this strange, distant world bears similarities to earth according to a new study in the british weekly journal nature.
titan has long intrigued space scientists as it is the only moon in the solar system to have a dense atmos,which like earth's mainly comprises nitrogen.
titan atmos. is also rich in methane, although the source for this vast store of hyrdrocarbon is unclear.methane has a relatively limited life. a molecule of the compoun lasts several tens of millions of years before it is broken up by sunlight.
scientist believe that titan has a methane cycle a system that is like the water cycle on earth,in which the liquid evaporates,cools and condenses and then falls as rain,replenshing the ssurface liquid.
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