Europe's Rosetta spacecraft has spotted big grains of water ice on the surface of Comet 67P/Churyumov-Gerasimenko; the grains may have formed after heat from the sun vaporized buried water ice, which then recondensed and was redeposited.
Europe's Rosetta spacecraft has spotted big grains of water ice on the surface of Comet 67P/Churyumov-Gerasimenko; the grains may have formed after heat from the sun vaporized buried water ice, which then recondensed and was redeposited.
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