If you recall, local space in this setting looks roughly like this:
The highlighted area is the area covered by our map – 3×3 sectors – with the central one, marked with a small “X”, the main sector the setting is all about. Coreward is up, Outward is down, Spinward is left and Trailing is right.
In order to create this central sector, we do need to know what’s just outside them, so I have been creating those other eight sectors’ worth of planets. I will not really check them or fix them up, except for regions that are actually important to my effort. This means all systems that I need to create trade routes to (so I can add them to my map) and a small section in the right-hand sector into which Empire has extended.
These are the tentative names I’ve picked:
Core: This is the core of colonial space. The empire/republic are here, and most of the important colonies. The border of this sector is pretty much the “edge of civilization”.
Expanses: Imperial colonisation and expansion was mostly directed towards this sector. It is a fairly sparse sector.
Frontier: This is an attractive sector with a dense population of star systems. From the Imperial/Republic Core sector it is only reachable via two key routes, and it is almost entirely unexplored.
Nebula: Dense interstellar gas clouds dominate this region, and many systems in this sector are fairly young. There is little usable real estate in this sector, and astrogation is hazardous.
Void: As the name implies, systems are scarce in this sector, but it is essentially divided into two regions. The more coreward void region, and a more outward-laying cluster of star systems.
Sentinel: The original colonists approached from this direction; it is a sector comparable to Core in terms of system density. Several smaller interstellar nations exist close to Core sector, and Empire (and now Republic) does extend about one subsector into the Sentinel sector. Exploration does not extend far into this direction, however, and all of the logs and astrogational data from the original fleet has been lost.
Islands: Several small startclusters dominate this sector, separated by great distances which make travel complicated.
Marches: Another frontier region pegged for expansion by Imperial authorities. However, since it is slightly further away and several other nations are in between Empire and the Marches sector, exploration projects had emphasized the coreward directions. It is unknown what, if any, expansion the Republic will undertake. The sector itself is fairly sparse in star systems close to Core sectors, but the outer region of the Marches is dense in stars.
Tempest: This sector is remarkable for an unusually high number of asteroid belts, nova remnants, and dead worlds – that is, worlds where life had once existed, but which are now sterile. The cause is unknown.