Translation guide
A terrestrial planet is a rocky planet like Earth, Mercury, Venus, or Mars. In Japanese, this is expressed with specific scientific terms or descriptive phrases.
The standard astronomical term for a rocky planet.
The most common and standard term in astronomy.
Terrestrial planets are mainly made of rock and metal.
Literally 'rocky planet', used in scientific contexts.
There are four rocky planets in the solar system.
Means 'solid planet', sometimes used to contrast with gas giants.
Solid planets, unlike gas planets, have a solid surface.
A non-technical way to describe a planet like Earth.