Slip Fold Engines are designed to create a kind of fold in space which stretches the distance between two points. Once the fold is created, the ship will enter into a kind of bubble and perceivably only travel a short distance, but upon coming out of the Slip Fold, traveled a great deal in reality. In simple terms, the ship in its bubble enter a kind of alternate dimension where in spacetime is measured differently, but do not actually transition into a different physical space, meaning spatial bodies such as planets and moons must still be navigated around.