Terrestrial planets include Mercury, Venus, Earth, and Mars. These planets are relatively small in size and in mass. A terrestrial planet has a solid rocky surface, with metals deep in its interior.

In 1992 astronomers reported the first planet-size masses around a dead star ... But only a handful of the exoplanets discovered so far are terrestrial, rocky types like Earth, and very few ...

Between the orbits of the terrestrial planets and the gas giants, there are millions of asteroids – rocky objects that orbit the Sun and vary in size from 1km to around 1000km. Like planets ...