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Meteors, Asteroids and Comets
Global map of Vesta temperature
01/26/12

 

As this global map of average surface temperature shows, the warmer equatorial zone of the giant asteroid Vesta is likely too warm to sustain water ice below the surface. But roughly half of Vesta is so cold and receives so little sunlight on average that water ice could have survived there for billions of years. Image Credit: NASA/GSFC/UMBC



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