OGS18 (orbit-gravity-sim-18.exe) is a 3D-n-body-gravity simulator, designed to demonstrate the consequences of one of a binary pair of stars, going nova.

The gravity structure that results from the nova event, is identical to the orbits found in the Kuiper belt. It is thus abundantly clear that the Kuiper belt is a consequence of a nova.

Written in Visual Basic 6, tested in Windows 10.
OGS18 uses the standard Windows API, so should run on most systems.

The gravity engine is:
Newtonian-Planck open-source 3D-n-body-gravity.