I think their should be two new modules both when attached to a ship should be very expensive and take a long time to build but that is because of what i think they should do the first is the terraforming module (which should require a lot of tech to use) if you send a ship with a terraforming module to a 0 planet then it should turn it into say a class 5 (don't want it to high or you would have hundereds of wonder planets). the second is the orbital base module this would when used on say gas gaint planets allow you to set up a base in the moons of the gas gaint dedicated to either mining for profit or research.