In honor of the upcoming release of T-Minus, I'll post a few cool links to space-y stuff. First up is a nifty article by Thomas Mallon from The Atlantic titled "Across the Universe". The Planetary Society, of which I am a member, figures prominently. Visit their site to learn more -- I recommend subscribing to their Planetary Radio podcast.
Maybe kill the audio on this one (or not) and skip to about 1:10. A clip from an old episode of StarTrekDS9 where they recreate an ancient spaceship which is powered only by solar sail.
http://www.youtube.com/watch?v=Z2_Q5izzCoY