Most of it is inhabited by humans. I'm limiting non-human PC choices (for reasons); there is a species of 4-armed and very theatrical humanoids called the Garrana (whose worlds are in the center-top, haloed in purple) and a sub-species of Replicants (as in "the ones from Blade Runner, but emancipated and no longer limited by a 4-year lifespan"). You can tell that the Replicant 'homeworld' is the one with the white halo, because it's called Memory. BECAUSE BLADE RUNNER. GET IT?!
But what you probably can't tell is the reason why its only connection to the other stars is with Wilde, in the Benatar Sphere. [If you haven't figured it out, or aren't an 80s music nerd like me, note that the worlds of the Benatar Sphere are named after female singers popular in the 1980s.] As it turns out, Kim Wilde, she of "Kids In America", wrote a song called "Bladerunner", and released it on her "Teases And Dares" album in 1984. The song was inspired by the film of the same name, and featured sound effects from same. Hence the connection.
The Movida Unity, in the upper left, is composed of star systems named after Spanish and Mexican singers (and, in one case, a band) likewise from the 1980s. "Movida" means "movement", and refers to the cultural Madrid Movement (or Movida Madrileña) of that decade; "Olvido" is the first name of the Mexican/Spanish singer better known as Alaska, while Irma, Ilse, and Ivonne are the members of Mexican girl group Flans. (Irma ususally went by Mimi, but that didn't look or sound right.)
Most everything else explains itself, except for the orange systems in the bottom left. One of my players is Serbian, so I snuck in those worlds to amuse her; the names are "Fuck Off", "Don't Bother Me", and "Girl-Boobies". "Grozan" means "grouchy", since my player looked at those system names and commented, "It looks a very unwelcoming place to be".
As for why these names are still relevant in whatever future century we're playing in...there's no explanation other than "I like it that way and I think it's funny".
Hi, have we met? I'm Doc Rotwang!. I do this kind of thing.
