Zenephi

I think planetary defenses ( i.e. surface to orbit) would be another cool idea. Perhaps another planetary development option with multiple levels of upgradability that increases it's effectiveness against any ships that get within its range. The range of course would have to, at the very least, overlap the bombardment ranges of the capital ships and seige frigates. It seems to me that planets are helpless in the absence of a fleet and should be able to do a fair job of protecting its