~~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 characterized by temperatures below those typical of chromochemical zones, these giants are enveloped in permanent chromochemical hazes. Unlike their warmer counterparts, Cryotholians are distinguished by their ceaselessly cold atmospheres where precipitation in the form of rain does not occur. These planets exhibit a wide range of chromochemical compositions, with the exception of MesoAzurian and PyroAzurian types. When planets originally classified as MesoAzurian or PyroAzurian are ejected from their home systems and lose significant temperature, they transform into Cryotholian CryoAzurians, exemplifying the diverse adaptability of Jovian atmospheres to extreme cold conditions.

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