Ceres' mysterious existence has long puzzled scientists

March 5, 2015 6:56 AM

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The administration's Dawn spacecraft is expected to enter Ceres' orbit Friday, finally allowing scientists to begin exploring its existence after a near eight-year voyage.

Launched in September 2007, Dawn has traveled more than three billion miles so far, stopped to visit the asteroid Vesta on the way, and has beamed back some incredible photography. On Vesta, the probe captured what's believed to be one of the tallest mountains in the entire solar system -- three tim...

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