Adespoton is spot on. No gravitational force can be detected when in "free fall" which is what space orbit is. Even as gravity may grab you and accelerate you towards a large mass, there is no bodily sensation whatsoever. Every molecule of the bodily is (almost) identically effected. There is nothing to cue the brain that gravity is pulling you, even as you may change direction as a result of it. Very difficult for most people to understand this who are used to feeling earth under there feet, air against their skin, and visual references all around.