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.
You Might Also Like
Galaxies got their start nearly 14 billion years ago, with one unimaginably hot, dense and tiny pinpoint. How did we arrive at the universe's sprawling state of galactic affairs today?
Jupiter is the largest planet and is fifth from the sun. It is the third-brightest spot in our skies--after the sun and Venus. Jupiter is made up almost entirely of gas, which means it doesn't have a solid surface like Earth does.