地ち球きゅう型がた惑わく星せいちきゅうがたわくせいMeanings1nounterrestrial planet; rocky planetastronomyAstronomical term for a planet composed primarily of silicate rocks or metals, such as Mercury, Venus, Earth, and Mars.地ち球きゅう型がた惑わく星せいには、水すい星せい、金きん星せい、地ち球きゅう、火か星せいが含ふくまれる。Terrestrial planets include Mercury, Venus, Earth, and Mars.
