>>5011246I'm serious. I've gonee through the entire thing, and it is perfectly accurate to the data. All the simulator is working with is physics calculations based on the thrust of the vessels, their weights, and how the weights change duering flight. The simulator will correctly predict celestial events like solar eclipses and positions of other planets up to 50 years in advance because what's involved is mostly just newtonian.
https://en.wikipedia.org/wiki/Orbiter_(simulator) 