Mimas
/ˈmɑɪmæs/- Astronomy a satellite of Saturn, the seventh closest to the planet, which has a crater a third of its whole diameter and was discovered by W. Herschel in 1789 (diameter 390 km)【天文】土卫一（土星卫星之一）。
词源
named after a giant in Greek Mythology, killed by Mars.