~~Planetological classification system
Surface composition types:
-Ferridian: Iron
-Selenian: Rocky and silicate
-Carbidian: Carbonaceous
-Glacian: Solid of sea fluid types such as ices, sulfurs, quartzes
-Jovian: Gaseous

Sea level (for Terramare planets):
-Oceanic: 100%
-Pelagic: 90-100%
-Marine: 60-90%
-Estuarine: 40-60%
-Lacustrine: 10-40%
-Arid: 0-10%
-Desert: 0%

Cytherean subtypes:
-Greenhouse: Carbon dioxide clouds
-Misty: Water clouds
-Titanian: Orange clouds of Titan-like planets

Planetological specials:
-Europan: Planets have subsurface oceans
-Cytherean: Planets are completely cloaked by clouds
-Terramare: Planets have continents and oceans on its surface
-Chthonian: Planets lost envelope of hydrogen and helium
-Genesian: Artificial planets are constructed
-Cryotholian: Jovian planets below temperature zone, it has permanent chromochemical hazes and losing temperature, never raining. Similar to water ices and ammonia ices found in Jupiter and Saturn. Jovian planets have diverse chromochemical types but except MesoAzurian and PyroAzurian, MesoAzurian/PyroAzurian will becomes Cryotholian CryoAzurian when it ejected.

Evolutionary stage of life:
-Protobiotic: Worlds undergoing abiogenesis, rich in prebiotic molecules like protocells and other life-like organisms. Usually only a brief phase, but may become greatly extended by various planetary factors.
-Microbiotic: Most common type of biotic world. These worlds host microbial life, often of low complexity.
-Mesobiotic: Worlds with simple colonial, multicellular, and/or megacellular organisms.
-Macrobiotic: Worlds hosting a well developed ecosystem of macroscopic multicellular, colonial, and/or megacellular organisms.
-Neobiotic: Worlds that have had life introduced from another world or heavily modified by artificial means.
-Postbiotic: Worlds that had once hosted life which has since completely died out.

Sea fluid types (Terramare and Europan):
-Wateric: H2O
-Ammonic: NH3
-Methanic: CH4
-Sulfic: H2S
-Nitric: N2
-Nitroxic: NO2
-Brimstonic: S (molten sulfur)
-Cyanogenic: (CN)2
-Carboxic: CO
-Neonic: Ne
-Helic: He
-Oxygenic: O2
-Hydric: H2
-Carbonylic: Iron carbonyl
-Saltic: NaCl (molten salt)
-Quartzic: SiO2 (molten silica)

Chromochemical (Color-chemistry) types of clouds/hazes over thick atmosphere of hydrogen and helium (for Jovian planets):
-Letter - Demonymic name (Temperature zone): Chemical composition (Hex color)
-J - CryoAzurian (Cryotholian haze: 5< K, Most common clouds: 5-90 K): CH4 (#c4eeff)
-H - Frigidian (Cryotholian haze: 5< K, Most common clouds: 5-20 K): None (H or He). Clear and pristine, devoid of chemistry. (#f5f6ff)
-X - Neonean (Cryotholian haze: 15< K, Most common clouds: 15-35 K): Ne (#ffebeb)
-N - Lilacean (Cryotholian haze: 35< K, Most common clouds: 35-60 K): N2, CO, O2 (#fdf5ff)
-M - Methanean (Cryotholian haze: 55< K, Most common clouds: 55-90 K): CH4, C2H6, Ar (#def6ff)
-P - MesoAzurian (Will transform into CryoAzurian when it losing temperature. Cryotholian haze: 90< K, Most common clouds: 90-350 K): Organic compounds and sulfur (#73e6b8)
-T - Tholinian (Cryotholian haze: 60< K, Most common hazes: 60-550 K): Tholin, but nitrogen and methane, like atmosphere of Titan (#ffad66)
-S - Sulfurian (Cryotholian haze: 80< K, Most common clouds: 80-200 K): H2S, NH3, (NH4)HS, SO2 (#fff2ba)
-A - Ammonian (Cryotholian haze: 75< K, Most common clouds: 75-190 K): NH3, NH4HS, (NH4)2S, H2O (#ffe8bf)
-W - Waterian (Cryotholian haze: 170< K, Most common clouds: 170-360 K): H2O (#ffffff)
-V - Acidian (Cryotholian haze: 200< K, Most common clouds: 200-570 K): H2SO4, H3PO4, NH4H4PO4, H2O (#fff8d4)
-C - PyroAzurian (Will transform into CryoAzurian when it losing temperature. Most common clouds: >350 K): CH4 (#0045a6)
-G - Thiosulfian (Cryotholian haze: 400< K, Most common hazes: 400-1000 K): Sulfur and organosulfur compounds. (#cecda0)
-L - Siliconelian (Cryotholian haze: 550< K, Most common hazes: 550-1000 K): Siloxane and fluorosiloxane. (#998c7e)
-Z - Chloridian (Cryotholian haze: 620< K, Most common clouds: 620-900 K): CsCl, RbCl, KCl, ZnS (#9bab7f)
-K - Alkalian (Cryotholian haze: 800< K, Most common clouds: 800-1150 K): LiF, Li2S, Na2S, NaCl (#271f1d)
-Y - Erythronian (Cryotholian haze: 1100< K, Most common clouds: 1100-1500 K): Cr, MnO, MnS (#9b2d2d, #c75830)
-E - Silicatian (Cryotholian haze: 1200< K, Most common clouds: 1200-1900 K): Fe, FeO, MgO, SiO2 (#7e8c77, #788a8d)
-R - Rutilian (Cryotholian haze: 1400< K, Most common hazes: 1400-2000 K): TiO, TiO2, VO2 (#141313)
-U - Corundian (Cryotholian haze: 1700< K, Most common clouds: 1700-2350 K): Al2O3, CaO, calcium aluminates, perovskite (#e24c4c, #f28356, #e49393)
-B - Carbidian (Cryotholian haze: 2000< K, Most common clouds: 2000-2900 K): TiC, CaC2, VC, VC2, TiN, VN (#292017)
-F - Fuliginian (Cryotholian haze: 2600< K, Most common hazes: 2600-3400 K): C (#030004)