Triton and Pluto both probably originated in the Kuiper Belt.

Question

Quizplus · Accepted Answer

Both Triton and Pluto are classified as Kuiper Belt Objects (KBOs) and have similar characteristics to other objects in the Kuiper Belt, such as their composition and orbit. It is believed that they were once part of the Kuiper Belt before being gravitationally ejected and eventually captured by the gas giants Neptune and Jupiter, respectively. Triton and Pluto both have orbit characteristics similar to other objects in the Kuiper belt, and their compositions suggest that they originated from there as well.

Triton and Pluto Both Probably Originated in the Kuiper Belt