Black Hole.......Interesting
No, worm hole. A black hole or singularity is a super dense area of matter that is so dense That it collapses in on itself and even light cannot escape it's gravity.
A worm hole, which is referenced in this movie is a link between two sections of space/time. This is due to the assumption that space/time is not a flat solid surface. Think of folding a piece of paper in half and sticking a pencil through it. The pencil is the worm hole making the spots on the paper way closer that they were when the paper was flat.