Kuiper Belt
Beyond Pluto lie the Kuiper Belt, a collection of comet like objects. It was suggested by an astronomer named Gerard Kuiper that past Neptune lay a belt of celestial objects made up of rock and ice. Now astronomers think there might be around 100,000 of these objects in the Kuiper Belt. The biggest one of these besides Pluto and its moon Charon is 1992QBI, also known as Smiley, which is about 200 km across. Some astronomers think a tenth planet may lie beyond Pluto in the Kuiper Belt, because Pluto is to small to affect Uranus and Neptune's orbits. The Kuiper Belt is made up of asteroids and comets. It is the same age as the Solar System. And though it might seem impossible, the Kuiper Belt is not the last thing in the Solar System. Far beyond the Kuiper Belt lay the Oort Cloud.
