巨きょ大だい氷ひょう惑わく星せい

noun

ice giant

Astronomical term for a giant planet composed mainly of elements heavier than hydrogen and helium, such as oxygen, carbon, nitrogen, and sulfur. Uranus and Neptune are the ice giants in our solar system. Often contrasted with gas giants (木星型惑星).

See also: 天王星型惑星

• 天てん王のう星せいと海かい王おう星せいは巨きょ大だい氷ひょう惑わく星せいに分ぶん類るいされる。

  Uranus and Neptune are classified as ice giants.

• 巨きょ大だい氷ひょう惑わく星せいの内ない部ぶ構こう造ぞうはガス惑わく星せいとは異ことなる。

  The internal structure of ice giants differs from that of gas giants.