From NASA's Planetary Photojournal
Many large impact craters are seen in this view of the Saturnian moon Dione taken by Voyager 1 on Nov. 12, 1980 from a range of about 240,000 kilometers (149,000 miles). Bright radiating patterns probably represent debris rays thrown out of impact craters; other bright areas may be topographic ridges and valleys. Also visible are irregular valleys that represent old fault troughs degraded by impacts. The center of the frame is at 26 degrees south latitude on the Saturn-facing hemisphere.
Image Title: The Saturnian Moon Dione
Catalog #: PIA01366
Target Name: Dione
Spacecraft: Voyager 1
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Last Modified On: Monday, December 18, 2000