For the first time, rain has been observed falling at low altitude on this moon of Saturn.
Extensive rain from large cloud systems, spotted by Cassini’s cameras in late 2010, has apparently darkened the surface of the moon. The best explanation is these areas remained wet after methane rainstorms. The observations released today in the journal Science, combined with earlier results in Geophysical Research Letters last month, show the weather systems of Titan’s thick atmosphere and the changes wrought on its surface are affected by the changing seasons.
“It’s amazing to be watching such familiar activity as rainstorms and seasonal changes in weather patterns on a distant, icy satellite,” said Elizabeth Turtle, a Cassini imaging team associate at the Johns Hopkins University Applied Physics Lab in Laurel, Md., and lead author of today’s publication. “These observations are helping us to understand how Titan works as a system, as well as similar processes on our own planet.”
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Methane is light and the gravity is low, so i wonder how fast the rain falls.