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The bright spots visible on the surface of Ceres - the biggest object in the main asteroid belt - left everyone wondering as to what they could be. If water was out of the question, then what could they be? 91福利社鈥檚 Jonathan Amos talks to Andreas Nathues of the Max Planck Institute for Solar System Research in Goettingen, Germany about the answers new data from the Dawn spacecraft has provided. (Photo: Ceres spots 漏 NASA)
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