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Water World: Extrasolar planet is loaded with hot ice

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10:10am, May 16, 2007

Astronomers have found a Neptune-size planet outside the solar system that's composed mainly of water—albeit in solid form. With a torrid surface temperature of 600 kelvins, the planet can't support life. But its existence bodes well for finding watery planets that could provide a haven for life, say Frédéric Pont of the Geneva Observatory in Sauverny, Switzerland, and his colleagues, who report the discovery in an upcoming Astronomy & Astrophysics Letters.

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