Title:[0344] Iapetus - northern hemisphere
Caption:A Voyager 2 image of Iapetus taken on 22 August 1981 from 1.1 million km (680,000 miles). It shows the heavily cratered northern hemisphere towards the bright trailing side of the satellite.
Copyright:
Credit:NASA
Title:[0494] Iapetus - contrasting hemispheres
Caption:A Voyager 1 image of Iapetus taken on 12 November 1980 from 3.2 million km (1.9 million miles). The satellite's trailing hemisphere is four or five times brighter than its leading hemisphere.
Copyright:
Credit:A NASA/JPL PHOTO