Wormholes in universe of Solar System 5000 A.D.

The basic way to travel faster-than-light/interstellar/intergalactic in the universe of Solar System 5000 A.D. is through holes in the space-time continuum called wormholes, which are white at both ends with a black spot in the center at each end. The interiors of each wormhole is likewise white. It is believed that the wormholes are the artificial creation of a long-dead alien race.