(n.) A starlike body; esp. one of the numerous small planets whose orbits lie between those of Mars and Jupiter; -- called also planetoids and minor planets.

Earth Jupiter Mars Mercury Neptune Pluto Saturn Uranus Venus asteroids aurora particles blackout cosmic particles cosmic ray bombardment inferior planet intergalactic matter major planet meteor dust impacts meteors minor planet planet planetoid radiation secondary planet solar system space bullets superior planet terrestrial planet the bends wanderer weightlessness