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火星北極

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Side-by-side images of a trench dug by Phoenix's robotic arm, showing the sublimation of material – three whitish clumps in the lower left corner of the trench – presumed to be water ice, over the course of four days (Sol 20 to Sol 24).

フェニックス火星着陸機北極圏の氷と生命の痕跡を追った旅

フェニックス火星着陸機NASA水氷
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