Close Up of Enceladus' Tiger Stripes


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Close Up of Enceladus' Tiger Stripes
Credit: Paul Shenk (LPI), <a href="Universities Space Research Association | USRA">USRA; Cassini Imaging Team, SSI, JPL, ESA, NASA

Explanation: Could life exist beneath Enceladus? A recent flyby of Saturn's icy moon has bolstered this fascinating idea. Two years ago, images from the robotic Cassini spacecraft orbiting Saturn led astronomers to the undeniable conclusion that Saturn's moon Enceladus was spewing fountains of gas and ice crystals through cracks in its surface dubbed tiger stripes. Last month, Cassini dove through some of these plumes and determined that they contained water vapor laced with small amounts of methane as well as simple and complex organic molecules. Surprisingly, the plumes of Enceladus appear similar in make-up to many comets. What's more, the temperature and density of the plumes indicate they might have originated from a warmer source --