Where do comets come from?
by 
Kyogre-Stataen
ANSWERS: 2
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Comets are balls of ice and other material that can be 'left overs' from the formation of a solar system (ours or others). A solar system forms when a swirling cloud of gas and dust condenses enough to start an ongoing nuclear reaction in the middle of it - that's the star. The rest of the gases and dust 'accrete' (gather together via gravitational forces) to eventually form planets. Not all of this material ends up in the planets and their moons. It is this material that can wind up in a comet.
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most come from what is called the oort cloud.
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