What are the Small Bodies that Orbit Planets Small Solar-System Bodies These include asteroids, comets, and other small bodies. Asteroids These are large pieces of rock or metal and rock. Most asteroids orbit the sun between Mars and Jupiter. This region is called the Asteroid Belt. Astronomers have so far recorded the orbits of over 4000 asteroids. There are thousands … [Read more...] about What are the Small Bodies that Orbit Planets