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Crazy but true: MESSENGER spacecraft spots ice at Mercury's north pole
Crazy but true: MESSENGER spacecraft spots ice at Mercury's north pole

NASA’s MESSENGER spacecraft has sent back its first visible-light images of water ice on Mercury, the tiny charbroiled planet that orbits closest to the sun. The findings, described in the journal Geology, reveal that the ice deposits look surprisingly "fresh" – and hint that water could have been very recently delivered to rocky little Mercury. Even though Mercury sits less than 36 million miles from the sun – which is less than two-fifths of the Earth’s comfortable 93 million miles from sun – some ice still manages to cling to the planet’s surface. That’s because the ice lies at the poles, in permanently shadowed regions inside...

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