An activated stargate from “Buck Rogers in the 25th…

An activated stargate from “Buck Rogers in the 25th Century”. Stargates allowed for interstellar travel, presumably by establishing artificial wormholes between different solar systems. 

 The movie and various subsequent TV series of the Stargate franchise used devices of the same name that worked by the same principle, although in operation the Buck Rogers stargates appear more like the Jumpgates of the Babylon 5 franchise that allowed for entry into and egress from hyperspace.