Kuiper Belt, a disk-shaped region of space, extending beyond the orbit of Neptune, in which a very large number of minor planets are in orbit around the sun. These bodies, called Kuiper Belt objects (or trans-Neptunian objects), are generally less than 200 miles (320 km) in diameter, although some are larger. Quaoar, discovered in 2002, has a diameter of about 800 miles (1,300 km). Astronomers believe Kuiper Belt objects are composed of rock and ice and that some become comets. The discovery in 1992 of the object named 1992 QB1 provided the first observational evidence for the existence of the Kuiper Belt. The region is named after astronomer Gerard Kuiper, who theorized about distant objects in the solar system.
More To Explore
You Might Also Like
How a Supernova Works
A dying star can explode with the force of a few octillion nuclear bombs and create any element in the universe. But why do stars go supernova?
The Fastest Quiz You'll Ever Take
Make haste, poky person! Take this quiz to test your knowledge of the speediest stuff in the universe.