Voyager 1 's view of Dione. The top set were taken at ranges between 1.7 million and 600,000 kilometres, and show the wispy streaks on the trailing hemisphere. They are recorded in finer detail in the leftmost view of the lower set, from a range of 237,000 kilometres, which also shows that they radiate out from an anomalously dark patch. As the range closed to 162,000 kilometres, the perspective transitted the heavily cratered terrain of the Saturn-facing hemisphere. North is towards the top in each case.
Rhea's trailing hemisphere is dominated by bright streaks. The first three images were taken by Voyager 1 as it closed from 1.8 to 1.3 million kilometres. The perspective is migrating around onto the Saturn-facing hemisphere. In the 720,000-kilometre image (right) one streak is seen in detail, as is the large dark region and the cratered surface. North is towards the top in each case.
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