Dione, in astronomy

Dione (dīō`nē), in astronomy, one of the named moons, or natural satellites, of Saturn Saturn, in astronomy, 6th planet from the sun.

Astronomical and Physical Characteristics of Saturn

Saturn's orbit lies between those of Jupiter and Uranus; its mean distance from the sun is c.886 million mi (1.
..... Click the link for more information. . Also known as Saturn IV (or S4), Dione is 695 mi (1,120 km) in diameter, orbits Saturn at a mean distance of 234,500 mi (377,400 km), and has an orbital period of 2.737 earth days—the rotational period is unknown but is assumed to be the same as the orbital period. It was discovered in 1684 by the Italian-French astronomer Gian Domenico Cassini Gian Domenico Cassini, 1625–1712, was born in Italy and distinguished himself while at Bologna by his studies of the sun and planets, particularly Jupiter; he determined rotational periods for Jupiter, Mars, and Venus.
..... Click the link for more information. . Aside from Titan Titan (tī`tən), in astronomy, the largest of the named moons, or natural satellites, of Saturn .
..... Click the link for more information. , Dione is the densest of Saturn's satellites; it is believed to be composed primarily of water ice with a considerable fraction of denser material, such as silicate rock. The trailing hemisphere is more heavily cratered than the leading hemisphere, which is the reverse of the cratering on most of the other Saturnian satellites. Another moon, Helene Helene (həlēn`, hĕl`ənə), in astronomy, one of the named moons, or natural satellites, of Saturn .
..... Click the link for more information. , is co-orbital with Dione; that is, it orbits Saturn at the same distance as Dione, and precedes Dione by about 60°. Dione also forms a satellite pair with Enceladus Enceladus (ĕnsĕl`ədəs), in astronomy, one of the named moons, or natural satellites, of Saturn .
..... Click the link for more information. ; that is, the two moons interact gravitationally.

Dione, in Greek religion and mythology

Dione, in Greek religion and mythology, earth goddess. In some legends she is the daughter of Oceanus and Tethys; in others she is a Titaness, born to Uranus and Gaea. In yet another version she is the mother of Aphrodite. Her name is the feminine form of Zeus. Her cult was associated with the oracle at Dodona Dodona (dōdō`nə), in Greek religion, the oldest oracle , in inland Epirus, near modern Janina, sacred to Zeus and Dione.
..... Click the link for more information. .

Dione (redirected from Dione (disambiguation))

Dione, in astronomy

Astronomical and Physical Characteristics of Saturn

Dione, in Greek religion and mythology

Dione
(redirected from Dione (disambiguation))