noun
gas planet; gaseous planet
Astronomy term for a planet composed mainly of gases, such as Jupiter or Saturn.
木星は太陽系最大のガス惑星です。
Jupiter is the largest gas planet in the solar system.
Refers to terrestrial or rocky planets like Earth, in contrast to gas planets.
Compound of ガス (gasu, 'gas') and 惑星 (wakusei, 'planet').