So insane_alien to correct you on the idea of "fold space" it does have another name that you may know way better in the sci-fi universe and that is Warp(Star Trek) this idea is to fold the fabric of space-time like a blanket and in doing so shorten the distance you have to travel using just impulse engines(normal engines) now Star Trek has done this a lot, and the math behind fold space(warp technology) has shown it possible however the requirements of power would be enough to power the world 3 times over for a single space ship of sufficient crew, then not to mention the requirements of exotic matter such as antimatter. So as you can see with our current technology it is nothing but a pipe dream.
