I just thought that I would point out that the orbit of the moon around Earth in GalCiv2 is in the incorrect direction. In reality, viewed down the rotational axis from the north pole, Earth's rotation is counter-clockwise and the orbit of the moon is counter-clockwise. In the game, the moon orbits clockwise around Earth. The counter-clockwise orbit is the reason why the moon rises approximately 50 minutes later each day - it takes the rotation of Earth that much time to 'catch up' with the progression of the orbit of the moon. Were Earth to stop rotating, the moon would actually rise in the west and set in the east.
Of course, this doesn't make a bit of difference to gameplay... I just thought people might want to know.