A cluster of intergalactic ship warp junction spaceport cities in a worldline where Planet Nidras exists.

It's a facility that combines a highway service station with junctions and interchanges, a warp transfer spaceport city in the intergalaxy equipped with facilities like a large, comprehensive station in a major city where you can transfer to various trains. There are still warp junction cities from the era before spacetime gates existed, and as you might guess, only ships capable of hyperspace can transfer at those spaceports. Therefore, planetary ships and the like do not enter or leave. Currently, spacetime gates are becoming mainstream, so it seems that intergalaxy ship warp gate junction spaceport cities with many adjacent gates are increasing. Intergalactic cargo ships can simply enter a different gate, but passengers mostly use them like changing trains or airplanes. Incidentally, parallel time-axis gates, which require powerful power generation energy, currently only exist at the satellite-type spaceport clusters near the galaxy where the planet Nidras is located. (Gates exist in the parallel world lines connected to Nidras) The background galaxy is nice, but I didn't really want them to draw so many planets lol. Well, the spaceport is the main focus, so I guess it's okay♫ (^^;