火卫二（Deimos）的形状与地质特征由亚灾难性撞击解释

模拟研究表明，火卫二（Deimos）南极（south pole）的大型凹陷是由一次斜碰（oblique impact）形成的。这次撞击不仅塑造了其表面形态，还揭示了该火卫（Martian moon）具有多孔、破碎且类似碎石堆的内部结构。

Nature Astronomy, Published online: 18 August 2026; doi:10.1038/s41550-026-02956-w Simulations show that the large depression at the south pole of the Martian moon Deimos formed in an oblique impact that also smoothed its surface, revealing a very weak surface over a porous, fractured, rubble-pile-like interior.