Nothing too fancy, I suppose. I'm thinking a spiral outwards from Sol in the order of Volcanic, Gas, Terran, Desert, Asteroid Belt, Gas, Gas, Gas, Ice, Ice, Pirate. I'll put a Asteroid here or there for Luna or Io... by the way, what's the difference between Desert and Desert Home? Population and expansion slots? And how do you add rings (for Saturn)? And are there different Gas Giant colours?
Anyway, I mostly made this topic to ask questions and get suggestions. Such as: how should I balance it? I want to keep the route from Sol to Pirate as direct as possible... maybe have players start in another system and migrate there?
Anyway, suggestions welcome and hoped for.