| A heavily cratered surface is apparent in this photo of Saturn's satellite Tethys, taken Nov. 12, 1980, by Voyager 1 from a distance of 570,000 kilometers (354,000 miles). Other photos of Tethys showed the opposite hemisphere, dominated by what appears to be a large impact crater or hill. Tethys is about 1,000 kilometers (600 miles) in diameter and is composed largely of ice. Voyager 1 made its closest approach to Saturn Nov. 12, 1980. |