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2012 world in photos: Mysterious astronomy photos (18)

People's Daily Online)  09:50, December 29, 2012

Northern Mercury. Innermost planet Mercury would probably not be a good location for an interplanetary winter olympics. But new results based on data from the Mercury orbiting MESSENGER spacecraft indicate that it does have substantial water ice in permanently shadowed regions within craters near its north pole. (Photo/ NASA)


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(Editor:高奕楠、陈丽丹)

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