intergalactic travel

Intergalactic travel poses all the difficulties of interstellar travel multiplied a millionfold – the factor by which the typical distances between neighboring galaxies exceed those between stars in the neighborhood of the Sun. If intergalactic travel is ever to be achieved, it will require the development of relativistic starships that can accelerate to well over 99% of the speed of light (see relativistic effects) or, alternatively, some method of bypassing normal space-time altogether.