Iapetus
/aɪˈæpɪtəs/- Astronomy a satellite of Saturn, the seventeenth closest to the planet, having one bright icy side and one very dark side, discovered by Cassini in 1671 (diameter 1,440 km)【天文】土卫八。
词源
named after a Titan of Greek mythology, son of Uranus (Heaven) and Gaia (Earth).