BrickFest DC 2004. It's not much, but it's a start.
Update: To be honest, I don't know what I was thinking. The color scheme is all wrong & doesn't match any space sub-theme. It needed greebling. There's no minifigs or robots or moonscaping. It looks like it was thrown together in 15 minutes (but in all honest, took about an hour because I had to go digging for parts in unsorted bins.