~~Planetological classification system
Surface composition types:
-Ferrinian: Iron and other siderophiles
-Selenian: Rocky, silicate and other lithophiles
-Carbean: Carbonaceous
-Glacian: Solid of sea fluid types such as ices, sulfurs, quartzes
-Jovian: Gaseous, primarily made of hydrogen and helium

Surface types (for non-Jovian planets):
-Terramare: Planets have continents and oceans on its surface.
-Cytherean: Foggy/smoggy planets are completely cloaked by clouds and supercritical fluids of sea fluid types, resembling Venus.
-Europan (for Glacian planets): Planets have subsurface oceans.
-Oceanic: Ocean planets with 100% sea level.
-Sparsian: Sparse atmosphere with density between Luna and Mars.
-Airless: Planets lack atmospheres.

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

Other planet types:
-Chthonian (for non-Jovian planets): Planets lost envelope of hydrogen and helium.
-Genesian: Artificial planets are constructed.
-Verdantic (for Terramare planets): Planets with vegetation but devoid of animal life.
-Sideropean: Planets lack iron cores.

Sea fluid types (Surface and subglacial):
-Aquatic: H2O
-Ammonic: NH3
-Titanian: Short hydrocarbons, most commonly methane, ethane, and/or propane, with other organic compounds in lesser amounts.
-Petrolic: Moderate length hydrocarbons with a composition comparable to crude oil, containing the alkanes pentane to icosane along with a wide variety of other organic compounds.
-Alcoholic: Primarily methanol and ethanol.
-Sulfic: H2S
-Azotian: N2
-Nitroxic: NO2
-Brimstonian: S (molten sulfur)
-Cyanogenic: (CN)2
-Cyanic: HCN
-Carboxic: CO
-Veneric: CO2
-Ionean: SO2
-Disulfian: CS2
-Neonic: Ne
-Argonic: Ar
-Helic: He
-Oxygenean: O2
-Hydrogenean: H2
-Carbonylic: Iron carbonyl
-Saltic: NaCl (molten salt)
-Quartzic: SiO2 (molten silica)

Atmospheric composition types:
Hydrogean: Hydrogen-dominated atmosphere
Helian: Helium-dominated atmospheres
Hydridian: Atmospheres dominated by simple hydrides (CH4, NH3, H2O, HF)
Diatomian: Atmospheres dominated by diatomic non-metals (N2, O2, F2)
Chemonian: Atmospheres of other non-metal compounds (CO, CO2, SO2, NO2, HNO3, CS2, HCN)
Metalloidian: Metal and metalloid compound atmosphere (SiO2, MgO, FeO, NaCl, Na, Fe)
Edelian: Atmospheres dominated by other noble gases

Evolutionary stages 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.

Aerosol composition types of clouds/hazes over thick atmosphere of hydrogen and helium (for Jovian planets):
-Letter - Demonymic name (Hex color): Chemical composition
-A - CryoAzurian (#c4eeff): CH4.
-B - Frigidian (#f5f6ff): None. Clear and pristine, devoid of chemistry.
-C - Neonean (#ffebeb): Ne.
-D - Lilacean (#fdf5ff): N2, CO, O2.
-E - Methanean (#c4f8ff): CH4, C2H6, Ar.
-F - MesoAzurian (#41d9d9): CH4 and organic compounds, sulfur.
-G - Tholinian (#ffad66): Tholin, but nitrogen and methane, like atmosphere of Titan.
-H - Sulfurian (#fff2ba): H2S, NH3, (NH4)HS, HCl, SO2.
-I - Ammonian (#ffe8bf): NH3, NH4HS, (NH4)2S, H2O, CO2.
-J - Waterian (#ffffff): H2O.
-K - Acidian (#fff8d4): H2SO4, H3PO4, NH4H4PO4, H2O, NH4Cl.
-L - PyroAzurian (#0077a6): CH4.
-M - Thiosulfian (#cccc7a): Sulfur and organosulfur compounds.
-N - Siliconelian (#7d9999): Siloxane, fluorosiloxane, and other organosilicon compounds.
-O - Chloridian (#edfae1): CsCl, RbCl, KCl, ZnS.
-P - Alkalian (#59593e): LiF, Li2S, Na2S, NaCl.
-Q - Manganean (#4a766e, #d07d92): Cr, MnO, MnS.
-R - HyperPyroAzurian (#0047ab): CH4.
-S - Silicatian (#667d80, #688066): Fe, FeO, MgO, SiO2.
-T - Rutilian (#0d0904): TiO, TiO2, VO2.
-U - Corundian (#66a1ff, #fffbe6): Al2O3, CaO, calcium aluminates, perovskite.
-V - Carbidian (#1a1310): TiC, CaC2, VC, VC2, TiN, VN, SiC.
-W - Fuliginian (#030004): C.

For Jovian planets, aerosol types and temperature regime:
CryoAzurian: Clarified, 5-90 K
Frigidian: Cloud, 5-20 K
Neonean: Cloud, 15-35 K
Lilacean: Cloud, 35-60 K
Methanean: Cloud, 55-90 K
MesoAzurian: Clarified, 90-550 K
Tholinian: Haze, 60-550 K
Sulfurian: Cloud, 80-200 K
Ammonian: Cloud, 75-190 K
Waterian: Cloud, 170-360 K
Acidian: Cloud, 200-570 K
PyroAzurian: Clarified, 550-1300 K
Thiosulfian: Haze, 400-1000 K
Siliconelian: Haze, 550-1000 K
Chloridian: Cloud, 620-900 K
Alkalian: Cloud, 800-1150 K
Manganean: Cloud, 1100-1500 K
HyperPyroAzurian: Clarified, >1300 K
Silicatian: Cloud, 1200-1900 K
Rutilian: Haze, 1400-2000 K
Corundian: Cloud, 1700-2350 K
Carbidian: Cloud, 2000-2900 K
Fuliginian: Haze, 2600-3400 K