I hope this is in the right thread, I wasn't sure which one to put this in but this seemed like the most likely one to be right, so I'm sorry if this is in the wrong thread. Anyway, my question basically amounts to this: what is the difference between something orbiting around a still planet and something hovering over a rotating planet? On one hand, it seems like both situations would appear exactly the same, but on the other hand what happens is incredibly different (i.e. one plummets to the ground, while the other remains in orbit) In part, I suppose, this questioned formed because of the idea of a geostationary orbit, and partly from becoming accustomed to the logic behind relativity. Because the outcomes are so different, I know there must be some sort of objective observable difference, but for the life of me, I can't think of what it might be.