アイスジャイアント

noun

ice giant

Astronomical term for a type of planet like Uranus or Neptune, composed mainly of elements heavier than hydrogen and helium, such as water, ammonia, and methane ices. Also referred to as 天王星型惑星.

See also: 天王星型惑星 (てんのうせいがたわくせい)

• 天てん王のう星せいと海かい王おう星せいはアイスジャイアントに分ぶん類るいされる。

  Uranus and Neptune are classified as ice giants.