Figure 1: Captured asteroid. | Nature

Figure 1: Captured asteroid.

From: Shaken on impact

Figure 1

NASA

The pitted surface of the martian moon Phobos, about the size of Eros — the subject of Thomas and Robinson's study1 — and thought to be an asteroid caught by Mars's gravitational pull. The giant crater Stickney, 10 kilometres in diameter, is clearly visible at the top of the picture. Modelling of the impact that formed this crater7 led to the idea that seismic processes can resurface asteroids — a process now examined in detail1,11 that may help us to determine the mechanical structure of asteroids.

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