Fog of war that looks like a star map. Keep all of the systems hidden until you explore them. You only see the systems on the quadrant map that you have explored.
I don't know about the races you play, but mine have invented telescopes.
Actually... I'd like to be able to "explore" systems with large telescopes and scanning arrays located in other systems. Make them have limited range, of course.
[ July 10, 2002, 06:20: Message edited by: Imperator Fyron ]