I am confused about why astronauts and objects around them float in The Space Station [SS]. In space a long way from massive bodies, objects float. In free fall, objects behave as if in a Gravity free region; they also float. But the SS has 90% of the Gravity that exists on Earth. PLUS The SS is not accelerating in orbit, so its velocity is constant. So shouldn't objects sink toward the Earth AND move toward the rear of the SS, opposite the direction of motion [just as a rock in a wagon appears to move to the back of the wagon]. Which assumption or reasoning is flawed here ?