Extraterrestrial atmosphere other trace elements, including compounds based on hydrogen, nitrogen, sulfur, carbon, and oxygen. The atmosphere of Venus is much hotter and denser than that of Earth, though shallower. As greenhouse gases warm a lower atmosphere, they cool the upper atmosphere, leading to compact thermospheres. By some definitions, Venus has no stratosphere. The troposphere begins at the surface and extends up to an altitude of 65 kilometres (an altitude at which the mesosphere has already been reached on Earth). At the top of the troposphere, temperature and pressure reach Earth-like levels. Winds at the surface are a few metres per second,
Nu Earth Nu Earth Nu-Earth is the name of a fictional planet near two suns and a wormhole that is the main setting for the Rogue Trooper fictional universe. Due to its strategic importance the Southers and the Norts are fighting over the planet. This perpetual war has seen the use of just about every weapon of mass destruction, which made the planet's atmosphere toxic. Most life forms became extinct or mutated, and all inhabitants must wear protective chem-suits at all times. Because of this the Souther scientists were instructed to start the G.I. program to create a supersoldier immune to all