Black hole starship

A black hole starship enables faster-than-light travel by propelling a starship by using a black hole or kugelblitz as the energy source. It would use the immense gravitational pull of a black hole by using its gravity well as a slingshot to accelerate the starship to very high speeds.

A black hole starship offers some advantages compared to other possible methods. For example, in nuclear fusion or nuclear fission, only a small proportion of the mass is converted into energy, so enormous quantities of material would be needed. One possibility is antimatter, but the manufacturing of antimatter is hugely energy-inefficient, and is difficult to contain.