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.
A non-technical way to describe a planet like Earth.
Literally 'rocky planet', used in scientific contexts.
There are four rocky planets in the solar system.
Solid planets, unlike gas planets, have a solid surface.
Planets like Earth may have the potential for life.
Literally 'a planet made of rock', a clear descriptive phrase.
Planets made of rock are denser than planets made of gas.