That's where the mystery begins :D Surely I can't give you the synopsis about what happened next, because the rest will only be spoilers. FYI, the story is not about the cool or futuristic technology, but about the astronaut's searching for his identity. You might not be tempted to see this film by reading my synopsis above, but trust me, the story is original and engaging. No wonder this film reaches the rating of 89% on Rotten Tomatoes and 8.0 on IMDB. And yeah, Sam Rockwell is cool. I don't even remember he was the quirky Zaphod Beeblebrox from The Hitch Hikers Guide to the Galaxy.
So, if you're looking for a good movie, I recommend this. And remember that it's "Moon" without "New" before it :P