The first spacecraft ever to visit a dwarf planet has now been circling its target for a full Earth year. NASA's Dawn probe arrived at Ceres — the largest object in the main asteroid belt between Mars and Jupiter — on March 6, 2015, and has been mapping the dwarf planet in detail ever since. "Ceres has defied our expectations and surprised us in many ways, thanks to a year's worth of data from Dawn," Dawn deputy principal investigator Carol Raymond, of NASA's Jet Propulsion Laboratory in Pasadena, California, said in a statement.
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