It is easy to see how a rotating space station can simulate gravity through the centripetal force. Examples are swinging a cup of water in an arch, or theme park rides. I saw another discussion about this very topic and it got me interested and I was researching it, however everything I found suggested that there would be some wierdness, such as throwing a ball in the air wouldn't return to your hand like if you were on earth. But the main thing that I would like to discuss is the assumption that an object within the space station would have to be touching the floor of the station in order to pick up the acceleration and "feel gravity". This makes perfect intuitive sense, however: According to General relativity, a rotating disk's circumference divided by its radius is NOT equal to [tex]2 \pi[/tex] like normal circles. This is due to the warping of space, which is the same thing that happens around massive objects like planets. So I'm starting to think that an object just floating in the middle of the space station will actually feel a gravitational pull to the sides without touching it, according to general relativity. an interesting thought, if my idea is correct: If you were to throw something past the center of rotation it will fall outward in the other direction, which is inversely related to planets, if you cross the center you will fall inward in the opposite direction you were falling.