Space: 1889 and its companion Sky Galleons of Mars comprise one of the most memorable settings I've ever played. The character combat system wasn't great but the ship-to-ship rules were awesome. The book gave you atlases of Mars, Venus, the Moon, and Mercury along with the indigenous races for each planet. I fought the cursed Belgians from one end of Mars to the other and knew victory captaining the Screw Galley Texan's Pride. Now THAT was a setting!
This work, more than any other, inspired my pulp SciFi solar system for Space Nazis. Chadwick's vision of a hot and steamy Venus, a Mars in decline, and the world river of Mercury were all amazing. I admit I still love the setting after all these years.
Pinnacle Entertainment Group will release its own version of Space: 1889 at Gen Con this year melding my favorite setting with my favorite game system. If you're interested in learning more, you can download the free Introduction to Space: 1889 to tide you over until Pinnacle releases Red Sands to the rest of us who weren't able to attend Gen Con. (honest, I'm not grumbling.... much)