(かいおうせい)

かいおうせい
noun
Neptune (planet)
academicnature
1. Neptune (planet)
The eighth planet from the Sun, the farthest of the solar system's planets. Composed of (かい) (sea) + (おう) (king) + (せい) (star/planet).
海王星(かいおうせい)太陽系(たいようけい)第八惑星(だいはちわくせい)だ。
Neptune is the eighth planet in the solar system.
Neptune is a giant planet that appears blue.
海王星(かいおうせい)太陽(たいよう)から(とお)公転周期(こうてんしゅうき)(やく)百六十五年(ひゃくろくじゅうごねん)だ。
Neptune is far from the Sun, with an orbital period of about 165 years.

Named after Neptune, the Roman god of the sea — written with (かい) (sea) + (おう) (king) + (せい) (planet). The same pattern appears in other planet names: 水星(すいせい) (Mercury), 金星(きんせい) (Venus), 火星(かせい) (Mars), 木星(もくせい) (Jupiter), 土星(どせい) (Saturn), 天王星(てんのうせい) (Uranus).

Common collocations