I REALLY like the overall effect. I think it evokes exactly what you're trying for.
If you hadn't said that the word was GALILEO, I'd of thought it was CALILEO. It just doesn't look Geeish.
The thin-lines version isn't suitable for white-on-black use. The thin lines almost disappear in the large size, and everything disappears in the sub-text.
The sketches with the Tuscan effect completely lose the space-modern feeling - glad you decided against them!
- Herb




















Really cool project. The end result isn't really galactic to me, but it was a joy to see the whole process. You have a lot of good ideas which could potentially become several typefaces.