What I find interesting about Legend of Galactic Heroes is that it's a sci-fi series that's not Earth-centric. In fact, it's the reverse--Earth is a regression of who we were and the cult behind the planet are no better than terrorists (and I couldn't help myself at the pun of terrorists and Terraists).
A lot of science fiction is Earth-centric or that we take pride in the fact that we come from planet Earth: Star Trek, Babylon 5, Doctor Who, various works of Robert Heinlein, and even Asimov's Foundation series looks kindly at the planet (although it is not the center of his stories).
And then there are series's in which Earth is neutral and doesn't really come into play such as Star Wars or Dune, or it's wrecked from the start such as in Hitchhiker's Guide to the Galaxy or Titan A.E. (can't believe I'm mentioning that horrible movie).