A satellite of Saturn, the twelfth closest to the planet, discovered by Cassini in 1684, being icy with a partly cratered and partly smooth surface (diameter 1,120 km).
〔天文〕土卫四
Origin
Named after a Titan, the mother of Aphrodite, in Greek mythology.
Definition of Dione in US English:
Dione
proper noundīˈōnē
Astronomy
A satellite of Saturn, the twelfth closest to the planet, discovered by Cassini in 1684. Icy with a partly cratered and partly smooth surface, it has a diameter of 696 miles (1,120 km).
〔天文〕土卫四
Origin
Named after a Titan, the mother of Aphrodite, in Greek mythology.