The Kuiper Belt is an area of our solar system located beyond Neptune to about 100 astronomical units from the sun. Objects in the Kuiper Belt include large objects like the dwarf planets Pluto and Eris to small ice chunks and dust grains. Astronomers have tried to weigh the Kuiper Belt by looking for any changes in the cosmic microwave background radiation affected by passing through the thermal emissions from the Kuiper Belt material. So far, no traces have been found using NASA’s Cosmic Background Explorer. The Kuiper Belt’s gravitational influence doesn’t affect the orbit of Comet Halley either. Most of the Kuiper Belt material tends to be chunky with very few fine particles. Scientists believe the mass of the Kuiper Belt adds up to only a few Earth masses. That’s very little material in a very vast area of space.