Ah, so my part makes no sense, since the dome of planetary defense was the culmination of my game,
since I do not crawl like a sick person on any planet that I come across in my path, unlike AI.

I think above all to protect my planets because for example, the Snathis declared me war and in five turns, I took five planets
with four miserable battleships and a troop carrier.

I assure my back and then go forward.

Finally, GalCiv3, its long list of bugs and these many parts canceled because a patch, modified this or that part of the game tires me 
and I doubt to invest a few more money for the next expansion Intrigue.

The one that should have been the 4X par excellence, as the potential is immense, will finally be a disappointment more ...

AIs won't have access to the improvement if you sell them the tech.