50,000 MPH. No, if you were in deep space everything would look stationary.

Now, if you were traveling close to the speed of light then some bizarre things start to happen with you and everything relative to you.

I'm not sure what you'd actually see. I seem to remember a episode of Carl Sagan that touched on this. Traveling the speed of light would make time speed up drastically for everything around you and you would experience time more slowly relative to everything outside the ship.

I kind of remember Sagan saying you may see a tunnel vision like view with nothing but streaks of light all around you. But that's probably just a complete guess. Or maybe it isn't a guess and there's science behind it. Not sure. Someone more knowledgeable on this needs to answer. But what a site that would be.