The idea is straightforward. If spacetime can be warped so that it expands behind a starship and contracts in
front of
it, then the craft will be propelled along with the space it is in, like a surfboard on a wave. The craft will
never
travel locally faster than the speed of light, because the light, too, will be carried along with the expanding
wave of
space.
— Lawrence M. Krauss, The Physics of Star Trek
(HarperCollins,
1995)
time/end_o'journey
