I'm sure this has been asked 1000 times before, but here's my shot: If I had a time machine and intantaneously 'jumped' 1 hour in the future, would I lose all my kinematic vector (velocity, acceleration) during my time jump? I read on another thread on PF that the Earth is moving roughly 390 km/s considering motion around sun, sun's motion around galaxy, galaxy rotation through whatever. So it seems that after my time jump the Earth will have moved 1,404,000 km and I will be hopelessly adrift in space. It would seem that I should build my time machine with a very elaborate teleportation feature, or else do it in a space ship which means I would be spending a lot of time catching up to the Earth. 390 km/s is really, really fast! I'm curious about what the theoretical folks think, and yes, I have lost sleep over this!