I've tried this game over 20 times and tried all different ways to complete the technology tree and still cannot figure out what it takes to send a colony ship to a habitable planet and take ownership of it. I've seen how the computer races have two or more conquered habitable planets when I uncover their territory on the map.
Can some one please help me with this problem. I'm totally new to this game and there is no user manual available at this time to guide me on taking a habitable planet. thank you.