~~Planetological classification system
Surface composition types:
-Iron
-Rocky
-Carbonaceous
-Ice: Crust is made of solid fluid types
-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 type:
-Greenhouse: Carbon dioxide clouds
-Misty: Water clouds

Special:
-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: Gaseous planets below temperature zones that it can be found most commonly, gaseous planets have permanent hazes and losing its temperature, never raining.

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.

Fluid types:
-Wateric: H2O
-Ammonic: NH3
-Methanic: CH4
-Sulfic: H2S
-Nitric: N2
-Nitroxic: NO2
-Brimstonic: S
-Cyanogenic: (CN)2
-Carboxic: CO
-Neonic: Ne
-Helic: He
-Oxygenic: O2
-Hydric: H2
-Carbonylic: Iron carbonyl
-Saltic: NaCl
-Quartzic: SiO2

Chromochemical (Color-chemistry) types (for gaseous planets):
-Demonymic name (Temperature zone, it can be found most commonly): Chemical composition (Hex color)
-Frigidian (5-20 K): None. Clear and pristine, devoid of chemistry. (#f5f6ff)
-Neonean (15-35 K): Ne (#ffebeb)
-Lilacean (35-60 K): N2, CO, O2 (#fdf5ff)
-Methanean (55-90 K): CH4, C2H6, Ar (#c4eeff)
-Springian (90-350 K): Organic compounds and sulfur (#baffe3)
-Tholinian (60-550 K): Tholin, but nitrogen and methane, like atmosphere of Titan (#ffad66)
-Sulfurian (80-200 K): H2S, NH3, (NH4)HS, SO2 (#fff2ba)
-Ammonian (75-190 K): NH3, NH4HS, (NH4)2S, H2O (#ffdea6)
-Waterian (170-360 K): H2O (#ffffff)
-Acidian (200-570 K): H2SO4, H3PO4, NH4H4PO4, H2O (#fff8d4)
-Cobaltan (>350 K): Hydrocarbons (#0045a6)
-Thiosulfian (400-1000 K): Sulfur and organosulfur compounds. (#cecda0)
-Siliconelian (550-1000 K): Siloxane and fluorosiloxane. (#998c7e)
-Chloridian (620-900 K): CsCl, RbCl, KCl, ZnS (#9bab7f)
-Alkalian (800-1150 K): LiF, Li2S, Na2S, NaCl (#271f1d)
-Erythronian (1100-1500 K): Cr, MnO, MnS (#9b2d2d, #c75830)
-Silicatian (1200-1900 K): Fe, FeO, MgO, SiO2 (#7e8c77, #788a8d)
-Rutilian (1400-2000 K): TiO, TiO2, VO2 (#141313)
-Corundian (1700-2350 K): Al2O3, CaO, calcium aluminates, perovskite (#e24c4c, #f28356, #e49393)
-Carbidian (2000-2900 K): TiC, CaC2, VC, VC2, TiN, VN (#292017)
-Fuliginian (2600-3400 K): C (#030004)