Scientists detect water on dwarf planet Ceres
Scientists using the Herschel space observatory have detected water vapor on the largest and roundest object in the asteroid belt, Ceres.
Plumes of water vapor are thought to shoot up periodically from Ceres when portions of its icy surface warm slightly.
Ceres is classified as a dwarf planet, a solar system body bigger than an asteroid and smaller than a planet.
Lead author Michael Kuppers of ESA in Spain, said that this is the first time water vapor has been unequivocally detected on Ceres or any other object in the asteroid belt and provides proof that Ceres has an icy surface and an atmosphere.
The results come at the right time for NASA's Dawn mission, which is on its way to Ceres now after spending more than a year orbiting the large asteroid Vesta.
Dawn is scheduled to arrive at Ceres in the spring of 2015, where it will take the closest look ever at its surface.
Scientists believe Ceres contains rock in its interior with a thick mantle of ice that, if melted, would amount to more fresh water than is present on all of Earth.
The materials making up Ceres likely date from the first few million years of our solar system's existence and accumulated before the planets formed.
The study has been published in the journal Nature.
(Posted on 24-01-2014)
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