Mars' moon Deimos has a large crater on its southern pole. It's also covered by a layer of regolith so deep it buries many other, smaller craters. New research shows that an impact is responsible for both, and that the moon is rather fragile and porous, like a rubble pile asteroid.
Mars' moon Deimos has a large crater on its southern pole. It's also covered by a layer of regolith so deep it buries many other, smaller craters. New research shows that an impact is responsible for both, and that the moon is rather fragile and porous, like a rubble pile asteroid.
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