Saturn's Icy Moon Dione May Hide Watery

June 11 [Tue], 2013, 14:30
The plain-looking Saturn moon Dione may have once had a geologically active subsurface ocean, new images from NASA's Cassini spacecraft reveal.

Images of 's 500-mile-long (800 kilometers) mountain Janiculum Dorsa suggest that the moon could have been a weaker copycat of Enceladus, Saturn's icy geyser moon.

"There may turn out to be many more active worlds with water out there than we previously thought," Bonnie Buratti, who leads the Cassini science team at NASA's Jet Propulsion Laboratory in Pasadena, Calif., said in a statement.

are thought to exist on several bodies in the solar system, including Saturn's moons Enceladus and Titan and Jupiter's moon Europa. These geologic hotspots have garnered the interest of scientists searching for the building blocks of life beyond Earth. If Dione turned out to have a liquid layer under its crust, that would increase the moon's chances of supporting life.

, which has been exploring Saturn since 2004, detected a weak particle stream coming from Dione with its magnetometer. Images taken by the spacecraft suggest a slushy liquid layer might exist beneath its icy crust, as well as ancient, inactive fractures that now spew water ice and carbon-containing particles, much like ones seen on Enceladus.



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