Comets are not actually members of the solar system, but captured by the Sun.

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Comets are actually members of the solar system, formed from the same materials as the planets and asteroids. They are thought to have originated in the outer regions of the solar system and were captured by the gravity of the Sun or the planets into their current orbits. Comets are actually members of the solar system, originating from the Kuiper Belt and Oort Cloud. They are not captured by the Sun, but their orbits can be influenced by the gravitational pull of the planets.

Comets Are Not Actually Members of the Solar System, but Captured