A field or science dealing with the adaption of planets to human conditions. Was perfected during the Second Republic, with it's foremost master being the legendary terraformer Doramos. Many alien worlds were terraformed, making them habitable for human settlements. Most of these terraforming engines are still in operation, and can be essential for the survival of an entire planet.
Terraforming is partly a lost art in the contemporary Known Worlds, with only the basics still remembered by The Supreme Order of Engineers. Pandemonium's suffering is directly caused by the failiure of the planet's terraforming engines.
The Eskatonic Order is interested in the mystical aspects of terraforming, such as ley lines.