PIA00484: Concentric Rings Surrounding Valhalla
 Target Name:  Callisto
 Is a satellite of:  Jupiter
 Mission:  Voyager
 Spacecraft:  Voyager 1
 Instrument:  VG ISS - Narrow Angle
 Product Size:  740 x 750 pixels (w x h)
 Produced By:  JPL
 Producer ID:  P22194
 Addition Date:  1997-01-09
 Primary Data Set:  Voyager EDRs
 Full-Res TIFF:  PIA00484.tif (688.5 kB)
 Full-Res JPEG:  PIA00484.jpg (191.9 kB)

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Original Caption Released with Image:

The concentric rings surrounding Valhalla are perhaps the most distinctive geological feature on Callisto. This Voyager 1 close-up shows a segment of the ridged terrain. The presence of superimpact craters shows that the rings formed early in Callisto's history; however, the density of craters is less here than on other parts of the satellite, where the surface is older.

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