Astronomical Classifications

Created by Captain Rohana O'Touvelli on Sun Mar 13th, 2016 @ 1:18am

Class A
geothermal young (generates heat)
partially molten surface
hydrogen compounds in atmosphere

Class B
geomorteus young (generates heat)
partially molten, high temperature on surface
extremely tenuous, chemically inactive atmosphere

Class C
geoinactive young (generates no heat)
low temperature on surface
partially frozen atmosphere

Class D
planetoid: asteroid/moon
barren and cratered metallic, iron-nickel-silicate
surface none or very tenuous atmosphere

Class E
geoplastic protoplanet
molten, high temperature on surface
hydrogen compounds and reactive gases in atmosphere

Class F
geometallic protoplanet
volcanic surface
hydrogen compounds in atmosphere

Class G
geocrystalline protoplanet
crystallizing surface
carbon dioxide, some toxic gases

Class H
desert
hot and arid, little or no water on surface
may contain heavy gases and metal vapors

Class I
gas super gas giant
tenuous, comprised of gaseous hydrogen and hydrogen compounds, radiates heat
variable pressure and composition, may contain water vapor

Class J
standard gas giant
tenuous, comprised of gaseous hydrogen and hydrogen compounds
radiates some heat
variable pressure and composition in atmosphere

Class K
adaptable (can be terraformed into Class M worlds. Must be devoid of native life)
barren, little or no water
thin, mostly carbon dioxide

Class L
marginal (barely able to sustain life)
rocky and barren, little water
oxygen/argon, high concentration of carbon dioxide

Class M
terrestrial
water abundant
nitrogen, oxygen and trace elements

Class N
reducing
high temperature on surface, more land to water ratio
extremely dense, carbon dioxide and sulfides

Class O
pelagic
80%+ water
nitrogen, oxygen, and trace elements

Class P
glaciated
80%+ ice
nitrogen, oxygen, and trace elements

Class Q
variable (peculiar orbits/orbit around a variable output star/other factor which causes conditions to drastically change over time)
various
tenuous to dense

Class R
rogue (free drifting)
maybe temperate due to geothermal venting
primarily volcanic outgassing

Class S
ultra gas giant
tenuous, comprised of gaseous hydrogen and hydrogen compounds
radiates considerable heat variable pressure and composition, may contain water vapor

Class T
moderate gas giant
tenuous, comprised of gaseous hydrogen and hydrogen compounds
radiates considerable heat
variable pressure and composition, may contain water vapor

Class Y
demon
500K+
turbulent, saturated with toxic chemicals and therionic radiation


Categories: Stellar Cartography