Planet has 31 known moons
Scientists think liquid water is spewing out of these fractures on the southern pole of Enceladus.
Cassini captured this photograph of the plumes streaking out from the moon in a recent flyby.
(CNN) -- The Cassini space probe has found evidence of geysers erupting from underground pools of liquid water on Saturn's moon Enceladus, scientists announced on Thursday.
High-definition pictures beamed back from the probe showed huge plumes of ice coming from the moon's south pole.
"We're inferring that there is a liquid water reservoir under the surface and it's erupting in a geyser-like fashion, maybe like the Yellowstone geysers you would see," said Linda Spilker, Cassini Deputy Project Scientist.
Spilker said it was very surprising to see this much activity on such a small, cold moon. The average temperature at Enceladus' south pole is minus 307 degrees Fahrenheit (minus 188 Celsius) -- that's a little warmer than the moon's equator, which was minus 316 Fahrenheit (minus 193 Celsius).
She said that the water was likely kept at the relatively warm temperature of 32 degrees Fahrenheit (zero Celsius) by tidal or radioactive forces. It freezes instantly as it escapes vents in the surface.
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