Terraformation

Terraformation is a practice performed by planets that have at least Tier 3 technology. It involves the changing of a planet's atmosphere, geography, etc. so a specific race can live on that planet. It is most commonly used by a planet in its solar system's habitable zone to colonize the other, uninhabitable planets in that solar system. A example of this would be Uan's colonization of Dynacro Prime, which before terraformation, had an atmosphere mostly made up of carbon monoxide.