Askurri 's Orbital Slingshot is an expensive and extraordiarily dangerous construction using a tiny black hole, the size of the point at the end of this line. It allows a properly equipped spaceship to travel at almost light speeds before opening a stable wormhole, so unstable it can be held open for only four and a half seconds before it begins to collapse, and the closing wormhole would destroy any ship going farther than one hundred light-years, as the closing hole closed faster than the ship, even at a fraction less than light speed, and the only way back is a very dangerous method known as Wormhole Hooking, where a wormhole opens right next to the black hole and right next to the ship, and the ship is pulled by the gravity of the black hole, this requires an enormous amount of energy,