固こ体たい惑わく星せい

noun

terrestrial planet; rocky planet

Astronomical term for a planet with a solid rocky surface, as opposed to a gas giant. Synonymous with 地球型惑星.

See also: 地球型惑星 (ちきゅうがたわくせい)

• 地ち球きゅうや火か星せいは固こ体たい惑わく星せいに分ぶん類るいされる。

  Earth and Mars are classified as terrestrial planets.

• 太たい陽よう系けいの固こ体たい惑わく星せいは水すい星せい、金きん星せい、地ち球きゅう、火か星せいの四よっつだ。

  The four terrestrial planets in the solar system are Mercury, Venus, Earth, and Mars.