Originally Posted by Huffmeister
That's what always bothered me about time travel sci-fi stories that said "We're in the same space, but have traveled forwards/backwards in time!" If the earth is spinning and you travel an hour into the future (starting in KC), the space that you were occupying is now in the Rockies. And then you factor in the earth orbiting the sun, and all of a sudden you're floating out in space in the earth's orbit. And then you factor in the sun and the entire solar system orbiting the Milky Way, and you're no longer even within the earth's orbit.
But that all assumes that there is a rigid 3-dimensional framework that everything in the universe moves through, which I've been told is not the case. And that's where I start to hit the limits of my small mind. Because maybe relativity would keep you on the earth, because it has the highest gravitational effect on you.
Gravity is actually the weakest of all the known forces. No one is really sure why it is so weak but the size of the earth is so massive that it has enough impact on us to keep us from flying off its surface.