Ship ability: Three ship classes in the Planets universe can change the climate of a planet until a certain temperature is reached. These are the Eros Class Research Vessel (cools down to 50°C), the Bohemian Class Survey Ship (heats up to 50°C) and the Onyx Class Frigate (heats up to 100°C). Each of these ships will change the climate by 1°C each turn just by orbiting it and having at least 1 kt of fuel on board. No special mission, friendly code or weapons are needed. Terraforming does not burn fuel. Any planet will be terraformed by these ships, no matter if they are owned at all or who they belong to. Terraforming is cumulative, multiple terraformers of the same kind will speed up the process.