Kerbal Space Program [0] (available on Steam) is a good simulator for lots of space things, but by default does not support multi-body physics (which are necess

Kerbal Space Program [0] (available on Steam) is a good simulator for lots of space things, but by default does not support multi-body physics (which are necessary for simulation of Lagrange points). There is a mod called Principia [1] that adds this functionality, though I've not used it personally. Probably not exactly the type of simulator you were looking for, but could be something! [0] https://www.kerbalspaceprogram.com/en/ https://www.kerbalspaceprogram.com/en/ [1] https://github.com/mockingbirdnest/Principia https://github.com/mockingbirdnest/Principia