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)
地球や火星は固体惑星に分類される。
Earth and Mars are classified as terrestrial planets.
太陽系の固体惑星は水星、金星、地球、火星の四つだ。
The four terrestrial planets in the solar system are Mercury, Venus, Earth, and Mars.
Compound of 固体 (solid) and 惑星 (planet), a straightforward modern scientific term.