Actually, there is no universal reference frame, so unless your time travel method requires a specific one, you’re going to need some mechanism to determine where in space you end up too. It makes some sense for a time machine to actually be a spaceship as well, even, because a time machine and a faster than light drive are fundamentally the same technology.
Actually, there is no universal reference frame, so unless your time travel method requires a specific one, you’re going to need some mechanism to determine where in space you end up too. It makes some sense for a time machine to actually be a spaceship as well, even, because a time machine and a faster than light drive are fundamentally the same technology.