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Impact craters are visible records of the collision of cosmic debris. On Dione, the largest crater is less than 100 km (62 mi) in diameter and shows a well-developed central peak. The sinuous valleys may have formed when faults broke the moon's icy crust. Images in this mosaic were taken from a range of 162,000 km (100,600 mi) on November 12, 1980.
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