The dwarf planet called Ceres orbits the Sun in the asteroid belt. An asteroid is a bit of rock. It can be thought of as what was left over after the Sun and all the planets were formed.Most of the asteroids in our solar system can be found orbiting the Sun between the orbits of Mars and Jupiter.This area is sometimes called the asteroid belt.he dwarf planet called Ceres orbits the Sun in the asteroid belt. An asteroid is a bit of rock. It can be thought of as what was left over after the Sun and all the planets were formed.