Results for “where do comets come from” · retrieved September 22, 2026
Comets originate from two main regions in the outer solar system: the Kuiper Belt and the Oort Cloud.
Answer details
The Kuiper Belt
Short-period comets, which orbit the Sun in less than 200 years, typically originate from the Kuiper Belt, a disk of icy bodies located beyond the orbit of Neptune.
The Oort Cloud
Long-period comets, which can take thousands or millions of years to orbit the Sun, generally come from the Oort Cloud, a vast, spherical region at the very edge of the solar system.
Interstellar Space
Occasionally, objects from outside our solar system, known as interstellar comets, drift into the inner solar system from other stars.
Solar System Formation
Comets are leftovers from the solar system's formation 4.6 billion years ago, originally scattered into these distant reservoirs by the gravitational instability of the giant planets.
Sources 8
About this answerComet Facts
may have brought water...We now know that comets are leftovers from the dawn of our solar system around 4.6 billion years ago, and consist mostly of ice coated with dark organic material. They have been referred to as "dirty snowballs." They may yield important clues about the formation of our solar system. Comets may have brought water and organic compounds, the building blocks of life, to the early Earth and other parts of the solar system....
April 24, 2025
Where do comets come from? - CORDIS - European Union
“Comet should really be a verb, rather than a noun,” says Guilbert-Lepoutre from the French National Centre for Scientific Research. “This is because astronomers have started to think of small bodies in our solar system on a continuum (from rocky and metallic through to icy). Recently for example, we detected cometary activity among some asteroids in the asteroid belt.” The comets that light up our skies are small bodies of rocky material and ice
December 13, 2025
Comets: What Are They? Where Do They Come From?
Like asteroids, comets are suspected to be remnants of planet formation in the Solar System about 4.6 billion years ago. But while asteroids are generally comprised of rock and metal, comets are more akin to dirty snowballs. They are composed of frozen gases such as carbon dioxide, methane, and ammonia, as well as water ice, in which dust particles and rocky material are embedded. As a comet approaches the Sun, solar radiation "melts" the surface
July 15, 2014
Comet
Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several millions of years. Short-period comets originate in the Kuiper belt or its associated scattered disc, which lie beyond the orbit of Neptune. Long-period comets are thought to originate in the Oort cloud, a spherical cloud of icy bodies extending from outside the Kuiper belt to halfway to the near
Publication date not supplied
Comets - Learn the facts
LOCATION: The distant Kuiper Belt and Oort Cloud regions of the solar system...Leave your spaceship on the launch pad for this mission. If there's any heavenly body that’s best seen from Earth’s surface, it’s a comet. These leftovers from the formation of our solar system aren’t much to look at up close. Each is an irregular ball of icy slush, frozen gases, and dark minerals just a few miles or kilometers wide. Comets originate far out in the sol
Publication date not supplied
Comets: Everything you need to know | Space
Comets are defined as icy bodies of frozen gases, rocks and dust left over from the formation of the solar system about 4.6 billion years ago....Comets are little bits of ice left over from the beginning of our solar system. They formed in the same disk of gas and dust that formed the eight planets, but because they formed in the very cold regions far away from the sun, they include a lot more ice....Astronomers are still measuring comet composit
Publication date not supplied
Formation of Comets
Questions regarding how primordial or pristine the comets of the solar system are have been an ongoing controversy. In this review, we describe comets’ physical evolution from dust and ice grains in the solar nebula to the contemporary small bodies in the outer solar system. This includes the phases of dust agglomeration, the formation of planetesimals, their thermal evolution and the outcomes of collisional processes. We use empirical evidence a
July 15, 2022
Origin and Evolution of Cometary Nuclei
Abstract One of the key goals of the Rosetta mission was to understand how, where and when comets formed in our solar system. There are two major hypotheses for the origin of comets, both pre-Rosetta: (1) hierarchical accretion of dust and ice grains in the Solar Neb ula and (2) the growth of pebbles, which are then brought together by streaming instabilities in the Solar Nebula to form larger bodies. Rosetta provided a wealth of new information
Publication date not supplied
Keep exploring
Related on this site
This page was prepared by Seeked from live retrieval on September 22, 2026 and is not continuously updated. Run a fresh search for the latest, or to inspect each source.