Venus is a world in the same solar system of Earth (Sol system) that has an extremely inhospitable environment for most humanoids. The average temperature of the surface is about 800˚F, and it has a heavy atmosphere mainly composed of high concentrations of carbon dioxide and methane gas. Worlds that have these or similar features that render them inhospitable for Human habitation are called 'Venus-Type worlds' by the Systems Commonwealth. The Pyrians can live on these worlds, and often try and pyroform Vedran-class worlds to become Venus-class so that they can colonize them.