Ah, so I did indeed.
As far as I know, FET doesn't bother to use any real laws of physics to describe the motions of the celestial bodies. Off the top of my head, they violate all of Kepler's laws, the Laws of Motion, Conservation of Energy, and both Newtonian and Relativistic gravity. If you're looking for real explanations, don't bother. FET doesn't have any.