Here's a little thought experiment for the absolute/relative debate over the nature of space: If I am in a void, and I perceive a small sphere some distance away from me, and it appears to be moving from left to right, is it really moving or could I be rotating to the left? How can I be sure if there is nothing else in relation to that object to judge its movement or even my own movement? I could be standing on a platfrom that is slowly rotating to the left while the small sphere remains stationary in the distance. It's kind of like when you see the sped up videos of the night sky and the stars seem to be moving around Earth when in reality we know we are the ones moving. I suppose if there were more than 1 object, and if one appears to move past the other, then we could say it was actually moving. But if they both moved at an apparent equal distance from one another and in perfect synchrony, I suppose we once again cannot be sure. Any thoughts?