Most of the asteroids lie in the main asteroid belt, which is the region between the orbits of Mars and Jupiter.

Similar to asteroid belt there is another belt of remnants in the Universe located between the orbit of Neptune and the Oort Cloud which is the Kuiper belt is much larger than the asteroid belt —20 times as wide and 20–200 times as massive. Like the asteroid belt, it consists mainly of small bodies or remnants from when the Solar System formed but these are ices compared to the silicates (rocks) and metals of the Asteroid Belt.

If we consider Planets, Venus is Earth's closest planetary neighbor when considering the closest approach to Earth, but not when considering the average distance. When averaged over time, Mercury is the closest planet to Earth.