NASAのインスタグラム(nasa) - 2月27日 21時29分
Layers and Dark Dunes: Much of Mars' surface is covered by fine-grained materials that hide the bedrock, but elsewhere, such as in this scene, the bedrock is well exposed (except where covered by sand dunes). Image credit: NASA/JPL-Caltech/Univ. of Arizona
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ダニ・ダニエルズさんがフォロー