Class L (Marginal) Age 4-10 billion years Diameter10,000-15,000km LocationEcosphere SurfaceRocky and barren, little surface water AtmosphereOxygen/argon, high concentration of carbon dioxide LifeformsLimited to plant life; suitable for humanoid colonization ExampleIndri VIII
Class M (Perfect) Earth (ST11) Terrestrial / Minshara class Age 3-10 billion years Diameter10,000-15,000km LocationEcosphere SurfaceSurface water abundant; if water or ice covers more than 80% of surface, planet is considered Class O or P Atmospherenitrogen, oxygen, trace elements LifeformsExtensive vegetation, animal life, humanoids
Class N (Reducing) Age 3-10 billion years Diameter10,000-15,000km LocationEcosphere SurfaceHigh surface temperature due to greenhouse effect; water exists only as vapor AtmosphereExtremely dense, carbon dioxide and sulfides LifeformsUnknown ExampleVenus
Class O (Pelagic) Age 3-10 billion years Diameter10,000-15,000km LocationEcosphere SurfaceLiquid water covers 80% or more of surface area AtmosphereNitrogen, oxygen, trace elements LifeformsAquatic vegetation, animal life, humanoids ExampleArgo
Class P (Glaciated) Exo III (TOS 09) Age 3-10 billion years Diameter10,000-15,000km LocationEcosphere SurfaceWater ice covers 80% or more of surface area AtmosphereNitrogen, oxygen, trace elements LifeformsHardy vegetation, animal life, humanoids ExampleExo III
Class Q (Variable) Age 2-10 billion years Diameter4,000-15,000km LocationHot Zone/Ecosphere/Cold Zone SurfaceRanges from molten to water and/or carbon dioxide ice due to eccentric orbit or variable output of star AtmosphereRanges from tenuous to very dense ExampleGenesis Planet
Class R (Rogue) Age 2-10 billion years Diameter4,000-15,000km LocationInterstellar space, cometary halos Surface may be temperate due to geothermal venting AtmospherePrimarily volcanic outgassing LifeformsNon-photosynthetic plants, animal life ExampleDakala
Classes S-T (Ultragiant) Age 2-10 billion years Diameter10-50 million km (Class S) 50-120 million km (Class T) LocationCold Zone SurfaceTenuous, composed of gaseous hydrogen and hydrogen compounds; radiates considerable heat AtmosphereZones vary in temperature, pressure, and composition; water vapor may be present LifeformsUnknown
Class Y (Demon) Age 2-10 billion years Diameter10,000-50,000km LocationHot Zone/Ecosphere/Cold Zone Surface temperature can exceed 500°K AtmosphereTurbulent, saturated with toxic chemicals and thermionic radiation LifeformsCrystalline, Mimetic ExampleTholia, Demon Planet (Delta Quadrant)
Julie: Now that we've got the classifications down, we need to find a place for our honeymoon Chase: Yeah, we do
You decide where they go on the honeymoon. Comment on the picture if you want that one, and the one with the most comment will be where Julie and Chase go...
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