As I understand it, the Starblazer in question was a UK comic book series -- specifically, an anthology series. So it wasn't a setting as much as it was a collection of settings in similar styles. Thus, SA the RPG doesn't have a terribly specific setting, as such. Wikipedia entry (which was already linked to, I clearly rolled ---- on that Alertness check)
I don't know if Adamant is going to do FATE stuff; I know GMS was thinking about it at one time, for either Mars or "Far West", but I think he decided not to. But, I can't speak for him, I'm just relying on hazy memories of blog posts.