Science fiction is a widely popular theme not only in gaming but in pop culture in general. Star Trek and Star Wars are huge franchises and have a large following. There are several Star Wars themed games. There are also games which are just sci-fi and space oriented. I realize as I am writing that we haven't played many sci-fi games. I had to rely on Boardgame.com to help me out!
Collectible Cards - WARS trading card game
Deck Building - Eminent Domain...I have played this and I like it a LOT!
Role Playing - Warhammer40k, Star Wars: Age of the Empire...we played this at a gaming convention. I liked it because it had special dice.
Co-op - Battlestar Galactica
Dice - Space Cadets Dice Duels
Worker Placement - Alien Frontiers
I think my family needs to check out some science fiction games! Check out some of these games! Live long and prosper!