Neptune

Neptune

Neptune is the eighth and farthest known planet orbiting the Sun. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth. Compared to Uranus, its neighbouring ice giant, Neptune is slightly smaller, but more massive and dense. Being composed primarily of gases and liquids, it has no well-defined solid surface. Neptune orbits the Sun once every 164.8 years at an orbital distance of 30.1 astronomical units. It is named after the Roman god of the sea and has the astronomical symbol , representing Neptune's trident.

Neptune (mythology)

Neptune is the god of freshwater and the sea in the Roman religion. He is the counterpart of the Greek god Poseidon. In the Greek-inspired tradition, he is a brother of Jupiter and Pluto, with whom he presides over the realms of heaven, the earthly world, and the seas. Salacia is his wife.

Neptune

Proper noun

1. The Roman god of earthquakes and the ocean, the counterpart of Poseidon in Greek mythology.
2. A personification of the ocean.

Noun

1. A sailor acting as Neptune (proper noun sense 1), the Roman god of the ocean, during a ceremony on board a ship when it is crossing the equator.