Without planets, no NPC stations in center of map
If a map is missing one or more planets, either due to be a custom map, or Asteroids only map, there are no NPC stations spawned where the planet would have been.
This is due to the Outposts and Orbital Stations not spawning without a planet/moon. Being the easy to get to stations, this leaves a big hole in the central part of the map,
For example I have a "Custom World" that is "Star System" with all the planets/moons deleted except Europa. The SPRT faction have one planet base, and one orbital base on Europa, the next nearest station is 28,000km from 0,0,0 (default space spawn coords)
Possible solutions to fixing it:
1. Make alternative station locations for each planet, if it's not there.
2. Spawn Orbital Stations even if the planet is missing, These stations would not look out of place in empty space.