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See the original image at apod.nasa.gov

Ancient Craters of Southern Rhea

apod.nasa.gov — Saturn's ragged moon Rhea has one of the oldest surfaces known. Estimated as changing little in the past billion years, Rhea shows craters so old they no longer appear round – their edges have become compromised by more recent cratering. Rhea's rotation is locked on Saturn, and the above image shows part of Rhea's surface that always faces Saturn.

Bury
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  • macosta5811, on 05/13/2008, -0/+2Rhea is a window of ancient times.
  • maybeishould, on 05/13/2008, -0/+1Headline from 2079:

    >Colonists Demand New Graviton Field Emitters, Weyland-Yutani Refuses
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