I may be overlooking something very elementary but I am playing as the Iridium and when I go to construct more colony ships they are not on the list. When I try to build one from scratch the colony modules aren't available as a part at all. So my initial reaction was I needed to research something - but I have (quickly) looked over the tech tree and cannot find a tech to research something that will grant me colony ships that also has a tooltip associated with it for the colony module. I am assuming the tool tips aren't finished and it is one of the techs in the tech tree. But I thought the ships were available right off the bat.
Can anyone shed some light on my poor little colonists wanting to settle more worlds? 
Thanks!