What are some good space themed songs?

I am filling my MySpace playlist with space related songs. So far, I have The Imperial March (Darth Vader's theme) by John Williams, Spaceman by The Killers, Starman by David Bowie, I Ran by Flock of Seagulls and The Star Wars Theme/Cantina Band by Meco. What are some other good space or alien songs? Any genre is cool!