It would create an unlimited number of ages to conquer so we can play for decades. Plus learn about the planets. I would creat also a space map from the world map useing a space ship so we would have to conquer territories on the planets. With the Great Building boosts do not have them applicable in the world ages, just in The space ages. You would have to allow the player to switch back and forth to play the world or space. Any othe thoughts i missed ?