Classes A - F

	Class A	Class B	Class C	Class D	Class E	Class F
Example	Gothos	Deneb Kaitos	Psi 2000	Yonada	Excalbia	Janus VI
Classification	Geothermal	Geomorteus	Geoinactive	Asteroid/Moon	Geoplastic	Geometallic
Age	>2 Billion	>10 Billion	2-10 Billion	2-10 Billion	>2 Billion	1-3 Billion
Diameter	1,000 - 10,000km	1,000 - 10,000km	1,000 - 10,000km	100 - 1,000km	10,000 - 15,000km	10,000 - 15,000km
Location	Ecosphere or cold zone	Hot zone	Ecosphere or cold zone	Planet locked	Ecosphere	Ecosphere
Surface	Partially molten	Partially molten, high-temperature	Low temperature	Barren, metals, nickel-iron-silicate	Molten, high surface temperature	Volcanic eruptions due to molten core
Atmosphere	Primarily hydrogen compounds	Chemically inactive, tenuous	Partially frozen	Tenuous/none	Hydrogen compounds and reactive gasses	Hydrogen compounds and reactive gasses
Evolution	Cools to become Class C	N/A	N/A	N/A	Cools to become Class F	Cools to become Class G
Lifeforms	None Known	None Known	None Known	None Known	Carbon-cycle (Excalbian)	Silicon-based (Horta)

Classes G - L

	Class G	Class H	Class I	Class J	Class K	Class L
Example	Delta Vega	Rigel XII	Q'tahl	Jupiter	Mudd	Chin'toka V
Classification	Geocrystalline	Desert	Gas Super-Giant	Gas Giant	Adaptable	Marginal
Age	3 - 4 Billion	4 - 10 Billion	2 - 10 Billion	2 - 10 Billion	4 - 10 Billion	4 - 10 Billion
Diameter	10,000 - 15,000km	8,000 - 15,000km	140,000 - 10 Billion km	50,000 - 140,000km	5,000 - 10,000km	10,000 - 15,000km
Location	Ecosphere	Hot Zone/Ecosphere	Cold Zone	Cold Zone	Ecosphere	Ecosphere
Surface	Still crystallizing	Hot and arid, with little water	Comprised of gaseous hydrogen compounds	Tenuous	Barren with little surface water	Rocky and barren, little surface water
Atmosphere	Carbon dioxide, some toxic gases	May contain heavy gasses and metal vapours	Zones vary in temperature, pressure, and composition	Zones vary in temperature, pressure, and composition	Thin, mostly carbon dioxide	Oxygen/Argon, high concentrations of carbon dioxide
Evolution	Cools to become class K, L, M, N, O, or P	N/A	N/A	N/A	N/A	N/A
Lifeforms	Primitive single-celled organisms	Drought- and radiation-resistant plants, animal life	Unknown	Hydrocarbon-based	Single-celled organisms, adaptable for humanoid life	Limited plant life

	Class M	Class N	Class O	Class P	Class Q	Class R
Example	Earth	Venus	Argo	Exo III	Remus	Dakala
Classification	Terrestrial	Reducing	Palagic	Glaciated	Variable	Rogue
Age	3 - 10 Billion	3 - 10 Billion	3 - 10 Billion	3 - 10 Billion	2 - 10 Billion	2 - 10 Billion
Diameter	10,000 - 15,000km	10,000 - 15,000km	10,000 - 15,000km	10,000 - 15,000km	4,000 - 15,000km	4,000 - 15,000km
Location	Ecosphere	Ecosphere	Ecosphere	Ecosphere	Hot Zone/Ecosphere/Cold Zone	Interstellar Space
Surface	Surface water abundant, but less than 80%	High surface temperature	80%+ water	80%+ water ice	Ranges from molten to water and/or carbon dioxide ice, due to eccentric orbit or variable output of star	May be temperate due to geothermal venting
Atmosphere	Nitrogen, oxygen, trace elements	Extremely dense with carbon dioxide and sulfides	Nitrogen, oxygen, trace elements	Nitrogen, oxygen, trace elements	Ranges from tenuous to very dense	Primarily volcanic outgassing
Evolution	N/A	N/A	N/A	N/A	N/A	N/A
Lifeforms	Extensive vegetation, animal life, humanoids	N/A	Aquatic vegetation, animal life, humanoids	Hardy vegetation, animal life, and humanoid	N/A	Non-photosynthetic plants

	Class S	Class T	Class Y
Example	Morona	Enthar	Tholia
Classification	Super-Giant	Ultra-Giant	Demon
Age	2 - 10 Billion	2 - 10 Billion	2 - 10 Billion
Diameter	10 - 50 Million km	50 - 120 Million km	10,000 - 15,000km
Location	Cold Zone	Cold Zone	Hot Zone/Ecosphere/Cold Zone
Surface	Comprised of gaseous hydrogen and hydrogen compounds	Comprised of gaseous hydrogen and hydrogen compounds	Temperatures exceeding 500°K
Atmosphere	Zones vary in temperature, pressure, and composition	Zones vary in temperature, pressure, and composition	Saturated with toxic chemicals and thermionic radiation
Evolution	N/A	N/A	N/A
Lifeforms	N/A	N/A	Mimetic, Tholionic