The following is a Planetary Classification Chart, listing the fourteen basic planet types found within stellar systems. It is important to note that in some cases the classification into which a planet falls depends upon many factors. For example, a gas giant may fall into classification A, B, or L depending upon its size and temperature. Likewise, the only factor separating I and J is orbital situation.
Planets are identified by the Star Name followed by a number denoting its orbital position. Moons are identified by their Planet's identity followed by a letter denoting their orbital position.
Class Description Composition Atmosphere Comments Class A Gas Supergiant Metallic Hydrogen Gaseous Hydrogen & Compounds Failed Star Sol V
( Jupiter )Class B Gas Giant Liquid Methane & Hydrogen Gaseous Hydrogen & Compounds Less Dense than Class A Class C Reducing Iron / Silicate Carbon Dioxide
( very hot & dense )Greenhouse Effect Sol II
( Venus )Class D Geo-plastic Magna Surface Rock Vapour & Chlorine Extremely Young L224-8 II
( Excalabia )Class E Geo-metallic Heavy Elements & Silicates Ammonia Heavy Metal
Rich Janus VI
(Motherlode)Class F Geo-crystalline Light Elements & Silicates Oxygen / Nitrogen & Trace Toxins Light Crystal Rich Delta-Vega II Class G Desert Metals / Silicates Oxygen / Nitrogen & Metal Vapor Heavy Crystal Rich Rigel XII (Hell) Class H Geo-thermal Silicates Toxic Complex Hydrocarbons Forming A. Centauri V (Rhodes) Class I Asteroid / Moon Metals / Silicates Types 1-3 None / Types 4-6 Faint Barren & Cratered Sol III-A (Luna) Class J Geo-morteous Light Elements & Silicates Tenuous Halogens Sun-baked Inner
World Sol I (Mercury)Class K Sub-terrestrial Iron / Silicate Toxic Small, Dome Adaptable Sol IV (Mars) Class L Outer Gas Giant Silicates Layered Frozen Gasses Tectonically Unstable Sol X (Persephone) Class M Terrestrial Iron / Silicate Oxygen / Nitrogen Carbon / Oxygen Life Cycle SolIII (Terra) Class N Pelagic Iron / Silicate Oxygen / Nitrogen Class M but
97%+ Water
Delta Pavonis I
CLASS M CHARACTERISTICS
Planets judged as capable of supporting humanoid life are classified as Class M. This classification is broken-down into nine sub classifications, which serve to identify the degree to which a tested planet varies from the standard norm (Earth has been classified as Class M-5, and as such is considered to fit squarely in the median of the curve - and so is used as the standard). There are many different characteristics utilized in measuring a planet's habitability, so that the ideal range fits within a narrow set of parameters, designed to eliminate obvious and subtle potential risks to colonization and visitation.
DISCLAIMER: Star Trek, The Next Generation, Deep Space Nine, Voyager, and all related elements are the property of Paramount Pictures. No profit is being made off of this page or any of the other pages in this directory. All character names are the property of their respective owners. This site is maintained by Tony Noble:tony_n@bigpond.com
