Had a similar idea and built a prototype for it. :)

Random3D seems to always have all the stars heading off to infinity.

Very cool! nice to be able to export json too

Very cool! Interesting how the choice of solver affects the solution. Euler doesn't handle misbehaved equations very well. You can see this in the Helix setup where the bodies just fly off.

Notes re: Multi-body problems on "Show HN: Browser-based interactive 3D Three-Body problem simulator" (2025) https://news.ycombinator.com/item?id=45981336 which has Velocity Verlet integration method, 4th-order Runge-Kutta (RK4), and Kepler solvers

No Weber very sad.