Part of Case study series.
(Whoops -- just noticed I missed my assigned date. Sorry.)
About worldbuilding? Yes, it's about travel patterns and thus, indirectly, "layout" of points of interest in space.
Risking off-topic? I think it's on-topic, though one could argue that I needed to specify a tech level rather than hand-waving that. I think that's ok because sometimes worldbuilding runs backwards -- I have this outcome, and I'll make the background lead to that.
About worldbuilding? Yes. The effects of planetary/lunar/solar configurations are well within our scope and we have many such questions.
Risking off-topic? No, I think this question is on pretty firm ground.
About worldbuilding? It's about communities' behavior in a world -- travel, fragmentation, interactions with outsiders. It could have been asked more cleanly, and the original version was in retrospect off-topic as a history question.
Risking off-topic? It's still a history question at heart and is kind of broad and speculative, though I tried to fix that in a later edit.
About worldbuilding? It's about the relation between magic and technology, both of which are core worldbuilding factors, so yes.
Risking off-topic? But it's pretty opinion-based and speculative. It's more a philosophy question than a concrete worldbuilding question. Were it asked now I think it would be closed. (That was, I think, Day 2 of private beta.)
About worldbuilding? Government is part of worlds and this is about developing government, so I say yes.
Risking off-topic? I think it's on-topic. It describes a desired outcome, suggests one way to possibly get there, and asks about alternatives to that. It draws some precedents from our world to provide some foundation.