Astrogeologists suspect that these scarps having formed billions of years ago as the planet's surfacecooled and shrank.
太空地质学家猜测这些陡坡是在几十亿年前当行星表面冷却收缩时开始形成的。
2
In MESSENGER's view, the crater floor is seen to be filled with an intricate series of cracks, formed as the molten surface resulting from the impact cooled and contracted.
信使号太空船在德加陨石坑表面观测到因熔融冷却收缩所产生的斑驳裂痕。
3
As the aerosolized material settled back down to the surface and cooled, it formed glass beads.