Category:Class A

Geothermal
Class A or Geothermal planets are small planets, only about one to ten thousand kilometers in diameter. These worlds are typically dominated by a barren landscape, are relativity young at only one million to two billion years old; and they are rife with volcanic activity. Because of this volcanic activity the surface is partially molten, surface temperatures can reach well above 500 Kelvin. The interior of Class A planets are almost completely molten, depending on the mass of the planet, the core may or may not be solid. Because of the volcanic activity the atmosphere is constantly replenished with new carbon dioxide and hydrogen gas. Class A planets can occupy any region within a star system, from the hot zone, ecosphere or cold zone. This class of planet almost never harbors complex lifeforms; any that do exist almost certainly die out when the planet cools down. As the planet ages its surface and interior cool and solidify, soon all volcanic activity ceases, at this time the planet is reclassified as a class C planet, sometimes Class A planets cool very rapidly, at this time they are reclassified as Class B planets.