- Rock deposited on the Earth from space. Meteorites can be divided into rocky and stony types, but most are chondrites, a class of rocky meteorites of granular structure, which may be samples of material almost unchanged from the origin of the solar system. Other types of meteorites seem to have undergone some form of geological processing. Meteorite orbits seem to resemble those of asteroids, as do their physical properties, which is further evidence that meteorites are messengers bearing powerful evidence of the early days of the solar system before the formation of the planets.
- A meteoroid which reaches the surface of the planet without being completely consumed.