Planetary Classes

From Trekipedia
Jump to: navigation, search

Class A

Geothermal[1]

Age 0-2 billion years
Diameter 1,000-10,000km
Location Ecosphere/Cold Zone
Surface Partially molten
Atmosphere Primarily hydrogen compounds
Evolution Cools to become Class C
Lifeforms None
Example Gothos
 

Class B

Geomorteus[1]

Age 0-10 billion years
Diameter 1,000-10,000km
Location Hot Zone
Surface Partially molten, high surface temperature
Atmosphere Extremely tenuous, few chemically active gases
Lifeforms None
Example Mercury
 

Class C

Geoinactive[1]

Age 2-10 billion years
Diameter 1,000-10,000km
Location Ecosphere/Cold Zone
Surface Low surface temperature
Atmosphere Frozen
Lifeforms None
Example Pluto, Psi 2000
 

Class D

Asteroid/Moon[1]

Age 2-10 billion years
Diameter 100-1,000km
Location Hot Zone/Ecosphere/Cold Zone; found primarily in orbit of larger planets or in asteroid fields
Surface Barren and cratered
Atmosphere None or very tenuous
Lifeforms None
Example Moon (Sol IIIa), Lunar V (Bajor VIIe)
 

Class E

Geoplastic[1]

Age 0-2 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Molten, high surface temperature
Atmosphere Hydrogen compounds and reactive gases
Evolution Cools to become Class F
Lifeforms Carbon cycle (Excalbians)
Example Excalbia
 

Class F

Geometallic[1]

Age 1-3 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Volcanic eruptions due to molten core
Atmosphere Hydrogen compounds
Evolution Cools to become Class G
Lifeforms Silicon-based (Horta)
Example Janus VI
 

Class G

Geocrystalline[1]

Age 3-4 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Still crystallizing
Atmosphere Carbon dioxide, some toxic gases
Evolution Cools to become Class K, L, M, N, O, or P
Lifeforms Primitive single-celled organisms
Example Delta Vega
 

Class H

Desert[1]

Age 4-10 billion years
Diameter 10,000-15,000km
Location Hot Zone/Ecosphere/Cold Zone
Surface Hot and arid, little or no surface water
Atmosphere May contain heavy gases and metal vapors
Lifeforms Drought- and radiation-resistant plants, animal life
Example Rigel XII, Tau Cygna V
 

Class I

Gas Supergiant[1]

Age 2-10 billion years
Diameter 140,000-10 million km
Location Cold Zone
Surface Tenuous, comprised of gaseous hydrogen and hydrogen compounds; radiates heat
Atmosphere Zones vary in temperature, pressure, and composition; water vapor may be present
Lifeforms Unknown
Example Q'tahl
 

Class J

Gas Giant[1]

Age 2-10 billion years
Diameter 50,000-140,000km
Location Cold Zone
Surface Tenuous, comprised of gaseous hydrogen and hydrogen compounds; radiates some heat
Atmosphere Zones vary in temperature, pressure, and composition
Lifeforms Hydrocarbon-based (Jovian)
Example Jupiter, Saturn
 

Class K

Adaptable[1]

Age 4-10 billion years
Diameter 5,000-10,000km
Location Ecosphere
Surface Barren, little or no surface water
Atmosphere Thin, mostly carbon dioxide
Lifeforms Primitive single-celled organisms; adaptable for humanoid colonization through the use of pressure domes
Example Mars
 

Class L

Marginal[1]

Age 4-10 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Rocky and barren, little surface water
Atmosphere Oxygen/argon, high concentration of carbon dioxide
Lifeforms Limited to plant life; suitable for humanoid colonization
Example Indri VIII
 

Class M

See: Class M Planets


Class N

Reducing[1]

Age 3-10 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface High surface temperature due to greenhouse effect; water exists only as vapor
Atmosphere Extremely dense, carbon dioxide and sulfides
Lifeforms Unknown
Example Venus
 

Class O

Pelagic[1]

Age 3-10 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Liquid water covers 80% or more of surface area
Atmosphere Nitrogen, oxygen, trace elements
Lifeforms Aquatic vegetation, animal life, humanoids
Example Argo
 

Class P

Glaciated[1]

Age 3-10 billion years
Diameter 10,000-15,000km
Location Ecosphere
Surface Water ice covers 80% or more of surface area
Atmosphere Nitrogen, oxygen, trace elements
Lifeforms Hardy vegetation, animal life, humanoids
Example Exo III
 

Class Q

Variable[1]

Age 2-10 billion years
Diameter 4,000-15,000km
Location Hot Zone/Ecosphere/Cold Zone
Surface Ranges from molten to water and/or carbon dioxide ice, due to eccentric orbit or variable output of star
Atmosphere Ranges from tenuous to very dense
Example Genesis Planet
 

Class R

Rogue[1]

Age 2-10 billion years
Diameter 4,000-15,000km
Location Interstellar space, cometary halos
Surface May be temperate due to geothermal venting
Atmosphere Primarily volcanic outgassing
Lifeforms Non-photosynthetic plants, animal life
Example Dakala
 

Classes S-T

Ultragiant[1]

Age 2-10 billion years
Diameter 10-50 million km (Class S)

50-120 million km (Class T)

Location Cold Zone
Surface Tenuous, composed of gaseous hydrogen and hydrogen compounds; radiates considerable heat
Atmosphere Zones vary in temperature, pressure, and composition; water vapor may be present
Lifeforms Unknown
 

Class Y

Demon[1]

Age 2-10 billion years
Diameter 10,000-50,000km
Location Hot Zone/Ecosphere/Cold Zone
Surface Temperature can exceed 500°K
Atmosphere Turbulent, saturated with toxic chemicals and thermionic radiation
Lifeforms Crystalline, Mimetic
Example Tholia, Demon Planet (Delta Quadrant)
 

References

Cite error: <ref> tag with name "TOS00" defined in <references> is not used in prior text.
Cite error: <ref> tag with name "ENT01" defined in <references> is not used in prior text.