I've just conquered my first peaceful alien enemy homeworld. The treasure trove of installations, minerals, and technology is unbelievable. What I'm wondering is, is there any way to get the enemy to surrender his civilian ships? Or will I simply have to hunt down and destroy them? Or will they simply vanish if I conquer his other remaining colonies? Does Aurora give you a message like you might see in other 4x games, saying "so and so has been completely vanquished", or will you always be left wondering if he's got something left somewhere?