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Kuiper belt

Adapted from Wikipedia · Explorer experience

A colorful image of Pluto and its moon Charon, showing their different landscapes as captured by NASA's New Horizons spacecraft.

The Kuiper Belt

The Kuiper belt is a big, quiet place far beyond the planet Neptune in our Solar System. Imagine a huge ring filled with icy pieces, stretching from about 30 to 50 times the distance between the Earth and the Sun. This chilly region is much bigger and heavier than the rocky asteroid belt between Mars and Jupiter.

The Kuiper belt is named after the clever astronomer Gerard Kuiper, who guessed it might exist in 1951. The first icy world found here, besides Pluto, was discovered in 1992, and since then, scientists have found thousands more! Many experts think there could be over 100,000 objects here that are bigger than 100 kilometers across.

Several special dwarf planets live in the Kuiper belt, including Pluto, Haumea, Quaoar, Makemake, and Orcus. These icy worlds help us learn about how our Solar System was born and how planets grow. The Kuiper belt marks one edge of our Solar System, along with even farther places like the Oort cloud.

The Kuiper belt is filled with objects made of frozen gases like methane, ammonia, and water. Because they are so far from the warm Sun, these objects have stayed almost the same since our Solar System began. Scientists use special tools to study the light from these icy worlds and discover what they are made of.

The Kuiper belt is a quiet, cold place where big pieces of space ice quietly spin and move. It helps us understand the early days of our Solar System and shows us how planets might form far from the Sun.

Images

An artist's drawing showing the exiled asteroid 2004 EW95, a special space rock from the early Solar System now found in the Kuiper Belt.
A diagram showing the positions of objects in the Kuiper belt, part of our Solar System, helping us understand space beyond the planets.
Professor Gerard Kuiper examining moon photos after arriving at Schiphol Airport in 1964.
A view of the Mauna Kea Observatory in Hawaii, where scientists study the stars and universe.
A scientific illustration showing how the outer planets affect the Kuiper belt objects in our solar system.
A colorful image of Triton, one of Pluto's moons, showing its icy surface and atmospheric features as captured by the Voyager 2 spacecraft.
Diagram showing the orbit of the space object 2014 MU69 and the path of the New Horizons spacecraft.
Detailed image of Ultima Thule, a celestial object captured by NASA's New Horizons spacecraft during its flyby in January 2019.
An image showing distant star systems with dusty planetary disks similar to our Kuiper belt.
A colorful image of Ceres, a dwarf planet, showing bright craters like Haulani and Oxo on its surface.
A colorful image of the planet Pluto showing its icy surface and famous 'heart' region, taken by NASA's New Horizons spacecraft.
A visual guide to the major objects in our Solar System, showing the relative sizes of the planets and the Sun.
A near-infrared spectrum of the dwarf planet Eris, showing its chemical composition.

This article is a child-friendly adaptation of the Wikipedia article on Kuiper belt, available under CC BY-SA 4.0.

Images from Wikimedia Commons. Tap any image to view credits and license.