Special processing has brought out surface detail in NASA's Voyager 2 image focusing on the large crater on Tethys. The spacecraft took this photograph Aug. 25, 1981, when it was 826,000 kilometers (513,000 miles) from the icy moon of Saturn

Special processing has brought out surface detail in this Voyager 2 image focusing on the large crater on Tethys. The spacecraft took this photograph Aug. 25, when it was 826,000 kilometers (513,000 miles) from the icy moon of Saturn. Here, resolution is about 15 km. (9 mi.). The crater has been flattened by the flow of softer ice and no longer shows the deep bowl shape characteristic of fresh craters in hard, cold ice or rock. It appears to have been formed early in Tethys' history, at a time when its interior was still relatively warm and soft. The Voyager project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.

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