HiRISE

天文·每日一图

火星上的不寻常坑洞

A brown background is shown covered with a gray topping that has many holes. On the upper right, there is a deep hole in the brown background. In this hole is more gray topping. Please see the explanation for more detailed information.
画面显示的是一个棕色背景,上面覆盖着带有许多孔洞的灰色覆盖层。在画面右上方,棕色背景中有一个较深的孔洞,孔洞中也填有灰色覆盖层。有关更多详细信息,请参阅说明。

天文·每日一图

火星的条纹沙丘

2021年01月06日 Striped Sand Dunes on Mars Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA; Processing: Włodek Głażewski; Text: Alex R. Howe (NASA/USRA, Reader’s History of SciFi Podcast) Explanation: Why are these sand dunes on Mars striped? No one is sure. The featured image shows striped dune

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