Title:[2015] Triton Caption:A high resolution color image of Neptune's largest moon, Triton, composed from about a dozen individual images taken on 25 August 1989. This view shows the Neptune-facing hemisphere with the south polar cap at the bottom. Copyright: Credit:NASA

Title:[0471] Triton from 530,000 km Caption:A Voyager 2 image of Triton from 530,000 km. The south pole is at the bottom left and the boundary between the brighter southern hemisphere and the darker northern hemisphere is clearly seen. Copyright: Credit:A NASA/JPL PHOTO