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Neptune

(Encyclopedia)Neptune, in astronomy, 8th planet from the sun at a mean distance of about 2.8 billion mi (4.5 billion km) with an orbit lying between those of Uranus and the dwarf planet Pluto; its period of revolut...

Neptune

(Encyclopedia)Neptune, in Roman religion and mythology, god of water. He was presumably an indigenous god of fertility, but in later times he was identified with the Greek Poseidon, god of the sea. At his festival,...

astronomy

(Encyclopedia)astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large. An...

Larissa

(Encyclopedia)Larissa, in astronomy, one of the natural satellites, or moons, of Neptune.

Galatea

(Encyclopedia)Galatea, in astronomy, one of the natural satellites, or moons, of Neptune.

Naiad

(Encyclopedia)Naiad, in astronomy, one of the natural satellites, or moons, of Neptune.

Despina

(Encyclopedia)Despina, in astronomy, one of the natural satellites, or moons, of Neptune.

Proteus

(Encyclopedia)Proteus pr´ts, –tyoos [key], in astronomy, one of the natural satellites, or moons, of Neptune. ...

Thalassa

(Encyclopedia)Thalassa thls´, thl´s [key], in astronomy, one of the natural satellites, or moons, of Neptune. ...

Nereid

(Encyclopedia)Nereid nr´d [key], in astronomy, one of the eight known moons, or natural satellites, of Neptune. ...