Answer:
It is thought that most comets originate in a vast cloud of ice and dust that surrounds the solar system. The Oort Cloud, as it is called, extends several thousand times farther from the Sun than Pluto, the outermost planet.
Explanation:
Hmmm well scientists believe there are two places most of our comets come from. Long period comets (which are comets that take 200 years to complete an orbit around the sun) are believed to come from the Oort cloud. Short period comets (comets that take less then 200 years to orbit around the sun) are believed to come from the Kuiper belt.
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