Planetary Classification

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United Federation Starfleet Planetary Classification

Planetary classification systems were used by many races to categorize planets. Various factors were taken into consideration, including atmospheric composition, surface temperature, vegetation and size. The classification system used by the Federation used single-letter designations, for example Class M to describe a planet able to support humanoid life for long periods, while the Vulcans used the term "Minshara class" to describe a similar planet. In United Federation Starfleet, planets are classified by letters corresponding to their environments and other factors. It is important to remember that no two planets are the same and therefore planetary classifications are never one hundred percent accurate. The list below shows factors that attribute planets to their respective classifications as well as examples of worlds attributed to this class.

Class A - Geothermal

Age: 0-2 Billion Years

Diameter: 1,000 - 10,000 km

Location: Ecosphere/Cold Zone

Surface: Partially Molten

Atmosphere: Primarily hydrogen compounds

Evolution: Cools to become Class-C

Lifeforms: None

Example: Gothos

Class B - Geomorteus

Age: 0-10 Billion Years

Diameter: 1,000 - 10,000 km

Location: Hot Zone

Surface: Partially Molten, High Surfact Temperature

Atmosphere: Few Chemically Active Gases

Evolution: Static due to Temperature

Lifeforms: None

Example: Mercury

Class C - Geoinactive

Age: 2-10 Billion Years

Diameter: 1,000 - 10,000 km

Location: Ecosphere/Cold Zone

Surface: Low Surface Temperature

Atmosphere: Frozen

Evolution: Static due to Temperature

Lifeforms: None

Example: Psi 2000

Class D - Asteroid/Moon

Age: 2-10 Billion Years

Diameter: 100 - 10,000 km

Location: Ecosphere/Cold Zone/Hot Zone (Found primarily in orbit of larger astral bodies or in asteriod fields.)

Surface: Barren

Atmosphere: None

Evolution: None

Lifeforms: None

Example: Moon

Class E - Geoplastic

Age: 0-2 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Molton/High Surface Temperature

Atmosphere: Hydrogen Compounds and Reactive Gases

Evolution: Cools to become Class-F

Lifeforms: Carbon-Cycle

Example: Excalbia

Class F - Geometallic

Age: 1-3 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Volcanic Eruptions due to Molton Core

Atmosphere: Hydrogen Compounds

Evolution: Cools to become Class-G

Lifeforms: Silicon-Based

Example: Janus IV

Class G - Geocrystalline

Age: 3-4 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Still Crystallizing

Atmosphere: Carbon Dioxide, Some Toxic Gases

Evolution: Static due to Temperature

Lifeforms: Primitive Single-Celled Organisms

Example: Delta Vega

Class H - Desert

Age: 4-10 Billion Years

Diameter: 8,000 - 15,000 km

Location: Ecosphere/Cold Zone/Hot Zone

Surface: Hot and arid, little or no surface water.

Atmosphere: May contain heavy gases, no neucleogenic particals found in Class-M atmospheres for water recycling.

Evolution: None

Lifeforms: Drought and radiation-resistant plants, animal life, some carbon-based intelligent life.

Example: Ocampa (Converted from Class-M world)

Class I - Gas Supergiant

Age: 2-10 Billion Years

Diameter: 140,000 - 10,000,000 km

Location: Cold Zone

Surface: Tenuous, comprised of gaseous hydrogen and hydrogen compounds, heat radiation.

Atmosphere: May vary in temperature, pressure and composition.

Evolution: None

Lifeforms: Unknown

Example: Q'tahL

Class J - Gas Giant

Age: 2-10 Billion Years

Diameter: 50,000 - 140,000 km

Location: Cold Zone

Surface: Tenuous, comprised of gaseous hydrogen and hydrogen compounds, some heat radiation.

Atmosphere: May vary in temperature, pressure and composition.

Evolution: May grow into a Class I

Lifeforms: Hydrocarbon-Based

Example: Pinastri VII

Class K - Adaptable

Age: 4-10 Billion Years

Diameter: 5,000 - 10,000 km

Location: Ecosphere

Surface: Barren, Little or no surface water.

Atmosphere: Thin, mostly Carbon Dioxide.

Evolution: None

Lifeforms: Primitive Single-Celled Organisms, may be adapted to Human colonization with pressure domes.

Example: Pinastri VI

Class L -Marginal

Age: 4-10 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Rocky and Barren, little surface water.

Atmosphere: Oxygen, Argon, High concentration of Carbon Dioxide.

Evolution: None

Lifeforms: Humanoid, Plant and Animal (Limited)

Example: Briori

Class M - Terrestrial

Age: 3-10 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Surface water abundant. (If more then 80% of the planet is covered with water, it is considered Class-O or Class-P.)

Atmosphere: Nitrogen, Oxygen, Trace Gases

Evolution: Evolution can vary.

Lifeforms: Extensive Planet, Animal and Advanced Carbon-Based Humanoid Life.

Example: Pinastri Prime

Class N - Reducing

Age: 3-10 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: High Surface Temperature, Water exists as Vapour/Greenhouse Effect.

Atmosphere: Extrememly dense Carbon Dioxide and sulfides.

Evolution: Can be the result of an industrial based Class-M world.

Lifeforms: Unknown

Example: Venus

Class O - Pelagic

Age: 3-10 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Liquid water covers 80% or more of surface area.

Atmosphere: Nitrogen, Oxygen, Trace Elements.

Evolution: None.

Lifeforms: Planet, Animal and complex humanoid life. (Althought mostly Aquatic)

Example: Pacifica

Class P - Glaciated

Age: 3-10 Billion Years

Diameter: 10,000 - 15,000 km

Location: Ecosphere

Surface: Water ice covers 80% of more of surface area.

Atmosphere: Nitrogen, Oxygen, Trace Elements.

Evolution: None

Lifeforms: Adapted Planets, Animal and complex humanoid life.

Example: Exo III

Class Q - Variable

Age: 2-10 Billion Years

Diameter: 4,000 - 15,000 km

Location: Hot Zone/Ecosphere/Cold Zone

Surface: Varies due to specific needs. May have eccentric Solar orbit.

Atmosphere: Varies due to specific needs.

Evolution: The product of Terraforming a world to suit specific needs. Also applies to the infamous "Genesis Effect".

Lifeforms: Varies

Example: Genesis

Class R - Rogue

Age: 2-10 Billion Years

Diameter: 4,000 - 15,000 km

Location: Interstellar Space, cometary halos, Nebula.

Surface: Temperate due to Geothermal Venting.

Atmosphere: Varies completely.

Evolution: Can be any other Class in other factors.

Lifeforms: Various Lifeforms.

Example: Argus (Pegasus Nebula), Founder's Homeworld (Omarion Nebula)

Class S-T - Ultragiant

Age: 2-10 Billion Years

Diameter: 50,000 - 120,000,000 km

Location: Cold Zone

Surface: Tenuous, radiates considerable heat.

Atmosphere: Various dense gas composition.

Evolution: Can be the result of an industrial based Class-M world.

Lifeforms: Unknown

Example: Etheria

Class Y - Demon

Age: 2-10 Billion Years

Diameter: 10,000 - 50,000 km

Location: Hot Zone/Ecosphere/Cold Zone

Surface: High Surface Temperature. Can exceed 500 Kelvin.

Atmosphere: Turbulent, saturated with Toxic chemicals.

Evolution: None

Lifeforms: Silver Blood

Example: Adara (Home of Light)