You searched for: “planetesimal
planetesimal
1. A small body that is the precursor of a planet in the early stages of solar system development, or the fragmented result of a cataclysmic collision between a planet and another celestial body.
2. A small rocky celestial object thought to have orbited the Sun in the early stages of the solar system before coalescing with others to form the planets.
3. A small solid body following a planetary orbit; a miniature planet.
This entry is located in the following unit: plano-, plan-, -plany, -plania (page 1)