with unreal physics what would even be the point?
There’s mathematical models to study orbits, because the study of orbits requires extra precision. Particularly if the intent is to do something useful like simulate a mars mission in which you set a satellite in geosynchronous orbit.
You could make the point that maybe Epic needs to produce a NASA version of the engine with near to no features, a calculator, and a rendering system that actually renders…
Then again, obviously NASA uses actually decent technology 