Revealed here for the first time in detail are the geological structures that mark the trailing hemisphere of Saturn's moon Iapetus. The region appears heavily cratered, particularly in the north and south polar regions. Near the top of the mosaic, numerous impact features visible in NASA Voyager 2 spacecraft images, acquired in 1981, are visible, including the craters Ogier and Charlemagne. The most prominent topographic feature in this view, in the bottom half of the mosaic, is a 450-kilometer-wide impact basin, one of at least nine such large basins on Iapetus.
NASA/JPL-Caltech/Space Science Institute