Most badlands are terrible desolate windswept places, but in some cases soft rock layers are sculpted into beautiful forms, and exposed rock layers may contain fossils and other interesting finds. Alan Kazlev Generic term for any barren, severely eroded places on terraformed or quasi-terraformed, garden or quasi-garden terrestrial planets, where the land is useless for habitation, farming or other human purposes. Dollan Warm clarified blue gas giants with temperatures between 350K and 800K Also known as northern or southern lights, or simply lights. Alan Kazlev A radiant emission caused by the bombardment of the atmosphere with charged particles that are being guided along the planet's magnetic lines of force. Often an atmosphere is divided into zones of similar pressure, temperature, and composition. Some of the most common are hydrogen, helium, methane, nitrogen, oxygen, argon, carbon dioxide, water vapour, and ammonia. A typical atmosphere consists of a mixture of gases. Alan Kazlev The gaseous envelope surrounding a planetary object, moon or star, (or possibly the habitable surfaces of an artificial structure. Categorization is usually simply by basic design, with no need for more elaboration. Dollan, and Steve Bowers Artificial worlds can be divided into habitats (when a habitat can be called a world is of course always a matter of taste, but the formation of a self-sustaining climate and ecology without the need for constant maintenance is usually the relevant point), mega-habitats (>100 km), Banks orbitals, ISOs, Dyson swarms, and other structures (like Kepleria). Artificial Worlds - Text by Anders Sandberg, John M.Artificial Planets - Text by Steve Bowers A number of very energy-costly, hi-tech or god-tech methods that allow the construction of new planets or planet-like objects to order.Dollan Mature, unusually hot and dry Arean type worlds. Dollan Cold Arean type worlds, often with considerable reserves of ice. AreanTundral Subtype - Text by John M.Dollan Young Mars-like worlds with moderate amounts of ocean cover AreanLacustric Subtype worlds - Text by John M.Dollan Mars-like worlds where the atmosphere and hydrosphere has largely disappeared due to the cessation of magnetic activity.
Apparent Brightness of the Local Sun - Text by Steve Bowers To standard Terragen eyes, suns with a different spectral type from Sol do not seem as bright from the surface of a terraformed planet, since less of their radiation falls within the visible range.They move in circular or near-circular orbits. They commonly range in mass from 0.44 Jupiters (for 51 Peg) to 3.64 Jupiters (Tau Bootis). The orbits are all small, with radii less than 0.1 A.U. Included in this category are 51 Peg itself, Tau Bootis, 55 Cancri, and Upsilon Andromedae, which have orbital periods of just 4.2, 3.3, 14.7 and 4.6 days, respectively. These were among the first extrasolar planets discovered by Terragen astronomers, during the pre-singularity period (early Information Age). Alan Kazlev A planet, that shows orbital periods shorter than 15 terran days.
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