Where did the bodies populating the Kuiper Belt generally form according to their origin hypothesis?

Answer

In situ, from material remaining in the outer reaches of the solar nebula

The prevailing understanding of the Kuiper Belt's formation suggests that its constituent bodies coalesced relatively close to their current positions. They are considered remnants that formed *in situ* within the material of the primordial, flat protoplanetary disk that extended into the solar system's outer regions beyond Neptune's orbit (around 30 AU). While the migration of Neptune is thought to have perturbed many of these Trans-Neptunian Objects (TNOs) into slightly different or eccentric orbits, they fundamentally remained confined to the plane of formation, unlike Oort Cloud objects which formed closer in and were scattered.

Where did the bodies populating the Kuiper Belt generally form according to their origin hypothesis?

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