Planetary Classification: Difference between revisions

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A planet is a celestial body in orbit around a star or stellar remnants, that has sufficient mass for self-gravity and is nearly spherical in shape.  A planet must not share its orbital region with other bodies of significant size (except for its own satellites), and must be below the threshold for thermonuclear fusion of deuterium.     
A '''planet''' is a celestial body in orbit around a star or stellar remnants, that has sufficient mass for self-gravity and is nearly spherical in shape.  A planet must not share its orbital region with other bodies of significant size (except for its own satellites), and must be below the threshold for thermonuclear fusion of deuterium.     


If a celestial body meets those requirements, it is considered a planet; at that point, the planet is further classified by its atmosphere and surface conditions into one of twenty-two categories.
If a celestial body meets those requirements, it is considered a planet; at that point, the planet is further classified by its atmosphere and surface conditions into one of twenty-two categories.
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| width="25%" | [[#Class R - Rogue|Class R - Rogue]]
| width="25%" | [[#Class R - Rogue|Class R - Rogue]]
|}
|}




== Class A - Geothermal ==
== Class A - Geothermal ==
Class A planets are very small, barren
'''Class A''' planets are very small, barren worlds rife with volcanic activity.  This activity traps carbon dioxide in the atmosphere and keeps temperatures on Class A planets very hot, no matter the location in a star system.  When the volcanic activity ceases, the planet "dies" and is then considered a Class C planet.
worlds rife with volcanic activity.  This
activity traps carbon dioxide in the
atmosphere and keeps temperatures
on Class A planets very hot, no matter
the location in a star system.  When
the volcanic activity ceases, the
planet "dies" and is then considered a
Class C planet.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||0-2 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassA3.png]]
|style="width:100px"|AGE||0-2 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassA3.png|400x400px]]
|-
|-
|DIAMETER||1,000 - 10,000 km
|DIAMETER||1,000 - 10,000 km
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== Class B - Geomorteus ==
== Class B - Geomorteus ==
Class B planets are generally small
'''Class B''' planets are generally small worlds located within a star system's Hot Zone.  Highly unsuited for humanoid life, Class B planets have thin atmospheres composed primarily of helium and sodium.  The surface is molten and highly unstable; temperatures range from 450° in the daylight, to nearly -200° at night.  No life forms have ever been observed on Class B planetoids.
worlds located within a star system's
Hot Zone.  Highly unsuited for
humanoid life, Class B planets have
thin atmospheres composed primarily
of helium and sodium.  The surface is
molten and highly unstable;
temperatures range from 450° in the
daylight, to nearly -200° at night.  No
life forms have ever been observed on
Class B planetoids.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||0-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassB3.png]]
|style="width:100px"|AGE||0-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassB3.png|400x400px]]
|-
|-
|DIAMETER||1,000 - 10,000 km
|DIAMETER||1,000 - 10,000 km
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== Class C - Geoinactive ==
== Class C - Geoinactive ==
When all volcanic activity on a Class A planet ceases, it is considered Class C. Essentially dead, these small worlds have cold, barren surfaces and possess no geological activity.
When all volcanic activity on a Class A planet ceases, it is considered '''Class C'''. Essentially dead, these small worlds have cold, barren surfaces and possess no geological activity.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassC3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassC3.png|400x400px]]
|-
|-
|DIAMETER||1,000 - 10,000 km
|DIAMETER||1,000 - 10,000 km
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== Class D - Dwarf ==
== Class D - Dwarf ==
Also known as Plutonian objects,
Also known as Plutonian objects, these tiny worlds are composed primarily of ice and are generally not considered true planets.  Many moons and asteroids are considered '''Class D''', as are the larger objects in a star system's Kuiper Belt.  Most are not suitable for humanoid life, though many can be colonized via pressure domes.
these tiny worlds are composed
primarily of ice and are generally not
considered true planets.  Many moons
and asteroids are considered Class D,
as are the larger objects in a star
system's Kuiper Belt.  Most are not
suitable for humanoid life, though
many can be colonized via pressure
domes.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassD3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassD3.png|400x400px]]
|-
|-
|DIAMETER||100 - 4,000 km
|DIAMETER||100 - 4,000 km
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== Class E - Geoplastic ==
== Class E - Geoplastic ==
Class E planets represent the earliest
'''Class E''' planets represent the earliest stage in the evolution of a habitable planet.  The core and crust is completely molten, making the planets susceptible to solar winds and radiation and subject to extremely high surface temperatures.  The atmosphere is very thin, composed of hydrogen and helium.  As the surface cools, the core and crust begin to harden, and the planet evolves into a Class F world.
stage in the evolution of a habitable
planet.  The core and crust is
completely molten, making the planets
susceptible to solar winds and
radiation and subject to extremely
high surface temperatures.  The
atmosphere is very thin, composed of
hydrogen and helium.  As the surface
cools, the core and crust begin to
harden, and the planet evolves into a
Class F world.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassE3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassE3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class F - Geometallic ==
== Class F - Geometallic ==
A Class E planet makes the transition
A Class E planet makes the transition to '''Class F''' once the crust and core have begun to harden.  Volcanic activity is also commonplace on Class F worlds; the steam expelled from volcanic eruptions eventually condenses into water, giving rise to shallow seas in which simple bacteria thrive.  When the planet's core is sufficiently cool, the volcanic activity ceases and the planet is considered Class G.
to Class F once the crust and core
have begun to harden.  Volcanic
activity is also commonplace on Class F
worlds; the steam expelled from
volcanic eruptions eventually
condenses into water, giving rise to
shallow seas in which simple bacteria
thrive.  When the planet's core is
sufficiently cool, the volcanic activity
ceases and the planet is considered
Class G.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||1-3 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassF3.png]]
|style="width:100px"|AGE||1-3 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassF3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class G - Geocrystalline ==
== Class G - Geocrystalline ==
After the core of a Class F planet is
After the core of a Class F planet is sufficiently cool, volcanic activity lessens and the planet is considered '''Class G'''.  Oxygen and nitrogen are present in some abundance in the atmosphere, giving rise to increasingly complex organisms such as primitive vegetation like algae, and animals similar to sponges and jellyfish.  As the surface cools, a Class G planet can evolve into a Class H, K, L, M, N, O, or P class world.
sufficiently cool, volcanic activity
lessens and the planet is considered
Class G.  Oxygen and nitrogen are
present in some abundance in the
atmosphere, giving rise to increasingly
complex organisms such as primitive
vegetation like algae, and animals
similar to sponges and jellyfish.  As the
surface cools, a Class G planet can
evolve into a Class H, K, L, M, N, O, or
P class world.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||3-4 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassG3.png]]
|style="width:100px"|AGE||3-4 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassG3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class H - Desert ==
== Class H - Desert ==
A planet is considered Class H if less
A planet is considered '''Class H''' if less than 20% of its surface is water. Though many Class H worlds are covered in sand, it is not required to be considered a desert; it must, however, receive little in the way of precipitation.  Drought-resistant plants and animals are common on Class H worlds, and many are inhabited by humanoid populations. Most Class H worlds are hot and arid, but conditions can vary greatly.
than 20% of its surface is water.
Though many Class H worlds are
covered in sand, it is not required to
be considered a desert; it must,
however, receive little in the way of
precipitation.  Drought-resistant
plants and animals are common on
Class H worlds, and many are
inhabited by humanoid populations.
Most Class H worlds are hot and arid,
but conditions can vary greatly.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassH3.png]]
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassH3.png|400x400px]]
|-
|-
|DIAMETER||8,000 - 15,000 km
|DIAMETER||8,000 - 15,000 km
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|LIFE FORMS||Drought-resistant plants/animals
|LIFE FORMS||Drought-resistant plants/animals
|-
|-
|EXAMPLES||Nimbus III, Ocampa
|EXAMPLES||[[Nimbus III]], Ocampa
|}
|}


== Class I - Ice Giant (Uranian) ==
== Class I - Ice Giant (Uranian) ==
Also known as Uranian planets, these
Also known as Uranian planets, these gaseous giants have vastly different compositions from other giant worlds; the core is mostly rock and ice surrounded by a tenuous layers of methane, water, and ammonia. Additionally, the magnetic field is sharply inclined to the axis of rotation.  '''Class I''' planets typically form on the fringe of a star system.
gaseous giants have vastly different
compositions from other giant worlds;
the core is mostly rock and ice
surrounded by a tenuous layers of
methane, water, and ammonia.
Additionally, the magnetic field is
sharply inclined to the axis of
rotation.  Class I planets typically form
on the fringe of a star system.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassI3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassI3.png|400x400px]]
|-
|-
|DIAMETER||30,000 - 100,000 km
|DIAMETER||30,000 - 100,000 km
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== Class J - Gas Giant (Jovian) ==
== Class J - Gas Giant (Jovian) ==
Class J planets are massive spheres of
'''Class J''' planets are massive spheres of liquid and gaseous hydrogen, with small cores of metallic hydrogen. Their atmospheres are extremely turbulent, with wind speeds in the most severe storms reaching 600 kph. Many Class J planets also possess impressive ring systems, composed primarily of rock, dust, and ice.  They form in the Cold Zone of a star system, though typically much closer than Class I planets.
liquid and gaseous hydrogen, with
small cores of metallic hydrogen.
Their atmospheres are extremely
turbulent, with wind speeds in the
most severe storms reaching 600 kph.
Many Class J planets also possess
impressive ring systems, composed
primarily of rock, dust, and ice.  They
form in the Cold Zone of a star
system, though typically much closer
than Class I planets.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassJ3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassJ3.png|400x400px]]
|-
|-
|DIAMETER||50,000 - 500,000 km
|DIAMETER||50,000 - 500,000 km
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== Class K - Adaptable ==
== Class K - Adaptable ==
Though similar in appearance to Class
Though similar in appearance to Class H worlds, '''Class K''' planets lack the robust atmosphere of their desert counterparts.  Though rare, primitive single-celled organisms have been known to exist, though more complex life never evolves.  Humanoid colonization is, however, possible through the use of pressure domes and in some cases, terraforming.   
H worlds, Class K planets lack the
robust atmosphere of their desert
counterparts.  Though rare, primitive
single-celled organisms have been
known to exist, though more complex
life never evolves.  Humanoid
colonization is, however, possible
through the use of pressure domes
and in some cases, terraforming.   


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassK3.png]]
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassK3.png|400x400px]]
|-
|-
|DIAMETER||5,000 - 10,000 km
|DIAMETER||5,000 - 10,000 km
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== Class L - Marginal ==
== Class L - Marginal ==
Class L planets are typically rocky,
'''Class L''' planets are typically rocky, forested worlds devoid of animal life. They are, however, well-suited for humanoid colonization and are prime candidates for terraforming.  Water is typically scarce, and if less than 20% of the surface is covered in water, the planet is considered Class H.   
forested worlds devoid of animal life.
They are, however, well-suited for
humanoid colonization and are prime
candidates for terraforming.  Water is
typically scarce, and if less than 20%
of the surface is covered in water,
the planet is considered Class H.   


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassL3.png]]
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassL3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class M - Terrestrial ==
== Class M - Terrestrial ==
Class M planets are robust and varied
'''Class M''' planets are robust and varied worlds composed primarily of silicate rocks, and are highly suited for humanoid life. To be considered Class M, between 20% and 80% of the surface must be covered in water; it must have a breathable oxygen-nitrogen atmosphere and temperate climate.   
worlds composed primarily of silicate
rocks, and are highly suited for
humanoid life. To be considered Class
M, between 20% and 80% of the
surface must be covered in water; it
must have a breathable oxygen-
nitrogen atmosphere and temperate
climate.   


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassM3.png]]
|style="width:100px"|AGE||4-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassM3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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|LIFE FORMS||Vegetation, animal, & humanoid
|LIFE FORMS||Vegetation, animal, & humanoid
|-
|-
|EXAMPLES||Earth, Cardassia, Bajor, Vulcan
|EXAMPLES||Earth, Cardassia, Bajor, [[Vulcan]]
|}
|}


== Class N - Reducing ==
== Class N - Reducing ==
Though frequently found in the
Though frequently found in the Ecosphere, '''Class N''' planets are not conducive to life.  The terrain is barren, with surface temperatures in excess of 500° and an atmospheric pressure more than 90 times that of a Class-M world.  Additionally, the atmosphere is very dense and composed of carbon dioxide; water exists only in the form of thick,vaporous clouds that shroud most of the planet.
Ecosphere, Class N planets are not
conducive to life.  The terrain is
barren, with surface temperatures in
excess of 500° and an atmospheric
pressure more than 90 times that
of a Class-M world.  Additionally, the
atmosphere is very dense and
composed of carbon dioxide; water
exists only in the form of
thick,vaporous clouds that shroud
most of the planet.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassN3.png]]
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassN3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class O - Pelagic ==
== Class O - Pelagic ==
Any planet with more than 80% of the
Any planet with more than 80% of the surface covered in water is considered '''Class O'''.  These worlds are usually very warm and possess vast cetacean populations in addition to tropical vegetation and animal life. Though rare, humanoid populations have also formed on Class O planets.   
surface covered in water is
considered Class O.  These worlds are
usually very warm and possess vast
cetacean populations in addition to
tropical vegetation and animal life.
Though rare, humanoid populations
have also formed on Class O planets.   


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassO3.png]]
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassO3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class P - Glaciated ==
== Class P - Glaciated ==
Any planet whose surface is more
Any planet whose surface is more than 80% frozen is considered '''Class P'''. These glaciated worlds are typically very cold, with temperatures rarely exceeding the freezing point.  Though not prime conditions for life, hearty plants and animals are not uncommon, and some species, such as the Aenar and the [[Andorians]], have evolved on Class P worlds.
than 80% frozen is considered Class P.
These glaciated worlds are typically
very cold, with temperatures rarely
exceeding the freezing point.  Though
not prime conditions for life, hearty
plants and animals are not uncommon,
and some species, such as the Aenar
and the Andorians, have evolved on
Class P worlds.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassP3.png]]
|style="width:100px"|AGE||3-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassP3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
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== Class Q - Variable ==
== Class Q - Variable ==
These rare planetoids typically
These rare planetoids typically develop with a highly eccentric orbit, or near stars with a variable output. As such, conditions on the planet's surface are widely varied.  Deserts and rain forests exist within a few kilometers of each other, while glaciers can simultaneously lie very near the equator.  Given the constant instability, is virtually impossible for life to exist on '''Class-Q''' worlds
develop with a highly eccentric orbit,
or near stars with a variable output.
As such, conditions on the planet's
surface are widely varied.  Deserts
and rain forests exist within a few
kilometers of each other, while
glaciers can simultaneously lie very
near the equator.  Given the constant
instability, is virtually impossible for
life to exist on Class-Q worlds


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassQ3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassQ3.png|400x400px]]
|-
|-
|DIAMETER||4,000 - 15,000 km
|DIAMETER||4,000 - 15,000 km
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== Class R - Rogue ==
== Class R - Rogue ==
A Class R planet usually forms within a
A '''Class R''' planet usually forms within a star system, but at some point in its evolution, the planet is expelled, likely the result of a catastrophic asteroid impact.  The shift radically changes the planet's evolution; many planets merely die, but geologically active planets can sustain a habitable surface via volcanic outgassing and geothermal venting.
star system, but at some point in its
evolution, the planet is expelled,
likely the result of a catastrophic
asteroid impact.  The shift radically
changes the planet's evolution; many
planets merely die, but geologically
active planets can sustain a habitable
surface via volcanic outgassing and
geothermal venting.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassR3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassR3.png|400x400px]]
|-
|-
|DIAMETER||4,000 - 15,000 km
|DIAMETER||4,000 - 15,000 km
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== Class S - Gas Supergiant ==
== Class S - Gas Supergiant ==
Aside from their immense size, Class S
Aside from their immense size, '''Class S''' planets are very similar to their Class J counterparts, with liquid metallic hydrogen cores surrounded by a hydrogen and helium atmosphere.
planets are very similar to their Class J
counterparts, with liquid metallic
hydrogen cores surrounded by a
hydrogen and helium atmosphere.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassS3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassS3.png|400x400px]]
|-
|-
|DIAMETER||500,000 - 100,000,000 km
|DIAMETER||500,000 - 100,000,000 km
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== Class U - Gas Ultragiant ==
== Class U - Gas Ultragiant ==
Class U planets represent the upper
'''Class U''' planets represent the upper limits of planetary masses.  Most exist within a star system's Cold Zone and are very similar to Class S and J planets. If they are sufficiently massive (13 times more massive than Jupiter), deuterium ignites nuclear fusion within the core, and the planet becomes a red dwarf star, creating a binary star system.
limits of planetary masses.  Most exist
within a star system's Cold Zone and
are very similar to Class S and J
planets. However, Class T planets
occasionally form within a star
system's Hot Zone.  If they are
sufficiently massive (13 times more
massive than Jupiter), deuterium
ignites nuclear fusion within the core,
and the planet becomes a red dwarf
star, creating a binary star system.


{| class="wikitable" width="674px"  
{| class="wikitable" width="674px"  style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassU3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassU3.png|400x400px]]
|-
|-
|DIAMETER||50,000,000 - 120,000,000 km
|DIAMETER||50,000,000 - 120,000,000 km
|-
|-
|LOCATION||Hot Zone/Cold Zone
|LOCATION||Cold Zone
|-
|-
|SURFACE||Liquid hydrogen, deuterium
|SURFACE||Liquid hydrogen, deuterium
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== Class X - Chthonian ==
== Class X - Chthonian ==
Class X planets are the result of a
'''Class X''' planets are the result of a failed Class T planet in a star system's Hot Zone.  Instead of becoming a gas giant or red dwarf star, a Class X planet was stripped of its hydrogen/helium atmosphere.  The result is a small, barren world similar to a Class B planet, but with no atmosphere and an extremely dense, metal-rich core.
failed Class T planet in a star system's
Hot Zone.  Instead of becoming a gas
giant or red dwarf star, a Class X
planet was stripped of its hydrogen/
helium atmosphere.  The result is a
small, barren world similar to a Class B
planet, but with no atmosphere and
an extremely dense, metal-rich core.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassX3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassX3.png|400x400px]]
|-
|-
|DIAMETER||1,000 - 10,000 km
|DIAMETER||1,000 - 10,000 km
Line 664: Line 479:


== Class Y - Demon ==
== Class Y - Demon ==
Perhaps the most environmentally
Perhaps the most environmentally unfriendly planets in the galaxy, '''Class Y''' planets are toxic to life in every way imaginable.  The atmosphere is saturated with toxic radiation, temperatures are extreme, and atmospheric storms are amongst the most severe in the galaxy, with winds in excess of 500 kph.
unfriendly planets in the galaxy,
Class Y planets are toxic to life in
every way imaginable.  The
atmosphere is saturated with toxic
radiation, temperatures are extreme,
and atmospheric storms are amongst
the most severe in the galaxy, with
winds in excess of 500 kph.


{| class="wikitable" width="674px"
{| class="wikitable" width="674px" style="background: #252525; color: white;"  
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassY3.png]]
|style="width:100px"|AGE||2-10 billion years||rowspan="8" style="width:100px; background-color:#000000;"|[[file:ClassY3.png|400x400px]]
|-
|-
|DIAMETER||10,000 - 15,000 km
|DIAMETER||10,000 - 15,000 km
Line 689: Line 496:
|LIFE FORMS||Mimetic
|LIFE FORMS||Mimetic
|-
|-
|EXAMPLES||Planet Hell (Delta Quadrant)
|EXAMPLES||Planet Hell ([[Delta Quadrant]]), [[Visalayan]] (Medusan)
|}
|}


==Copyright Notice==
==Disclaimer Notice==
Page used with permission of [http://www.usswolff.com USS Wolff CO] - granted Nov 1, 2016
''Page used with permission of [http://www.usswolff.com USS Wolff CO] - granted Nov 1, 2016''<br>
''Images by Chris Adamek and used with permission from http://sttff.net/''
 
[[Category:Starfleet Information]]
[[Category:General Information]]

Latest revision as of 21:30, 25 July 2020

A planet is a celestial body in orbit around a star or stellar remnants, that has sufficient mass for self-gravity and is nearly spherical in shape. A planet must not share its orbital region with other bodies of significant size (except for its own satellites), and must be below the threshold for thermonuclear fusion of deuterium.

If a celestial body meets those requirements, it is considered a planet; at that point, the planet is further classified by its atmosphere and surface conditions into one of twenty-two categories.

Contents

Class A - Geothermal Class G - Geocrystalline Class M - Terrestrial Class S - Gas Supergiant
Class B - Geomorteus Class H - Desert Class N - Reducing Class U - Gas Ultragiant
Class C - Geoinactive Class I - Ice Giant (Uranian) Class O - Pelagic Class X - Chthonian
Class D - Dwarf Class J - Gas Giant (Jovian) Class P - Glaciated Class Y - Demon
Class E - Geoplastic Class K - Adaptable Class Q - Variable
Class F - Geometallic Class L - Marginal Class R - Rogue


Class A - Geothermal

Class A planets are very small, barren worlds rife with volcanic activity. This activity traps carbon dioxide in the atmosphere and keeps temperatures on Class A planets very hot, no matter the location in a star system. When the volcanic activity ceases, the planet "dies" and is then considered a Class C planet.

AGE 0-2 billion years ClassA3.png
DIAMETER 1,000 - 10,000 km
LOCATION Hot Zone/Ecosphere/Cold Zone
SURFACE Partially molten, very hot
ATMOSPHERE Carbon dioxide, hydrogen
EVOLUTION Cools to become Class C
LIFE FORMS None
EXAMPLES Gothos

Class B - Geomorteus

Class B planets are generally small worlds located within a star system's Hot Zone. Highly unsuited for humanoid life, Class B planets have thin atmospheres composed primarily of helium and sodium. The surface is molten and highly unstable; temperatures range from 450° in the daylight, to nearly -200° at night. No life forms have ever been observed on Class B planetoids.

AGE 0-10 billion years ClassB3.png
DIAMETER 1,000 - 10,000 km
LOCATION Hot Zone
SURFACE Partially molten
ATMOSPHERE Exremely Tenuous
EVOLUTION N/A
LIFE FORMS None
EXAMPLES Mercury, Nebhilum

Class C - Geoinactive

When all volcanic activity on a Class A planet ceases, it is considered Class C. Essentially dead, these small worlds have cold, barren surfaces and possess no geological activity.

AGE 2-10 billion years ClassC3.png
DIAMETER 1,000 - 10,000 km
LOCATION Hot Zone/Ecosphere/Cold Zone
SURFACE Barren
ATMOSPHERE None
EVOLUTION N/A
LIFE FORMS None
EXAMPLES Psi 2000

Class D - Dwarf

Also known as Plutonian objects, these tiny worlds are composed primarily of ice and are generally not considered true planets. Many moons and asteroids are considered Class D, as are the larger objects in a star system's Kuiper Belt. Most are not suitable for humanoid life, though many can be colonized via pressure domes.

AGE 2-10 billion years ClassD3.png
DIAMETER 100 - 4,000 km
LOCATION Hot Zone/Ecosphere/Cold Zone
SURFACE Barren, Cratered
ATMOSPHERE None or Very Tenuous
EVOLUTION N/A
LIFE FORMS None
EXAMPLES Pluto, Ceres, Eredas-Il

Class E - Geoplastic

Class E planets represent the earliest stage in the evolution of a habitable planet. The core and crust is completely molten, making the planets susceptible to solar winds and radiation and subject to extremely high surface temperatures. The atmosphere is very thin, composed of hydrogen and helium. As the surface cools, the core and crust begin to harden, and the planet evolves into a Class F world.

AGE 2-10 billion years ClassE3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Molten, high surface temp.
ATMOSPHERE Hydrogen compounds
EVOLUTION Cools to become Class F
LIFE FORMS Carbon cycle
EXAMPLES Excalbia

Class F - Geometallic

A Class E planet makes the transition to Class F once the crust and core have begun to harden. Volcanic activity is also commonplace on Class F worlds; the steam expelled from volcanic eruptions eventually condenses into water, giving rise to shallow seas in which simple bacteria thrive. When the planet's core is sufficiently cool, the volcanic activity ceases and the planet is considered Class G.

AGE 1-3 billion years ClassF3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Volcanic, barren
ATMOSPHERE Carbon dioxide, ammonia, methane
EVOLUTION Cools to become Class G
LIFE FORMS Bacteria
EXAMPLES Janus IV

Class G - Geocrystalline

After the core of a Class F planet is sufficiently cool, volcanic activity lessens and the planet is considered Class G. Oxygen and nitrogen are present in some abundance in the atmosphere, giving rise to increasingly complex organisms such as primitive vegetation like algae, and animals similar to sponges and jellyfish. As the surface cools, a Class G planet can evolve into a Class H, K, L, M, N, O, or P class world.

AGE 3-4 billion years ClassG3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Rocky, mostly barren
ATMOSPHERE Carbon dioxide, oxygen, nitrogen
EVOLUTION Cools to Class H, K, L, M, N O, P
LIFE FORMS Vegetation, simple organisms
EXAMPLES Delta Vega

Class H - Desert

A planet is considered Class H if less than 20% of its surface is water. Though many Class H worlds are covered in sand, it is not required to be considered a desert; it must, however, receive little in the way of precipitation. Drought-resistant plants and animals are common on Class H worlds, and many are inhabited by humanoid populations. Most Class H worlds are hot and arid, but conditions can vary greatly.

AGE 4-10 billion years ClassH3.png
DIAMETER 8,000 - 15,000 km
LOCATION Ecosphere
SURFACE Hot, arid; >20% surface water
ATMOSPHERE Oxygen, nitrogen, argon, metals
EVOLUTION n/a
LIFE FORMS Drought-resistant plants/animals
EXAMPLES Nimbus III, Ocampa

Class I - Ice Giant (Uranian)

Also known as Uranian planets, these gaseous giants have vastly different compositions from other giant worlds; the core is mostly rock and ice surrounded by a tenuous layers of methane, water, and ammonia. Additionally, the magnetic field is sharply inclined to the axis of rotation. Class I planets typically form on the fringe of a star system.

AGE 2-10 billion years ClassI3.png
DIAMETER 30,000 - 100,000 km
LOCATION Cold Zone
SURFACE Rock, ice, methane, ammonia
ATMOSPHERE Hydrogen, Helium
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Uranus, Neptune, Q'tahL

Class J - Gas Giant (Jovian)

Class J planets are massive spheres of liquid and gaseous hydrogen, with small cores of metallic hydrogen. Their atmospheres are extremely turbulent, with wind speeds in the most severe storms reaching 600 kph. Many Class J planets also possess impressive ring systems, composed primarily of rock, dust, and ice. They form in the Cold Zone of a star system, though typically much closer than Class I planets.

AGE 2-10 billion years ClassJ3.png
DIAMETER 50,000 - 500,000 km
LOCATION Cold Zone
SURFACE Liquid metallic Hydrogen
ATMOSPHERE Hydrogen, Helium
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Jupiter, Saturn

Class K - Adaptable

Though similar in appearance to Class H worlds, Class K planets lack the robust atmosphere of their desert counterparts. Though rare, primitive single-celled organisms have been known to exist, though more complex life never evolves. Humanoid colonization is, however, possible through the use of pressure domes and in some cases, terraforming.

AGE 4-10 billion years ClassK3.png
DIAMETER 5,000 - 10,000 km
LOCATION Ecosphere
SURFACE Barren, little surface water
ATMOSPHERE Thin, mostly carbon dioxide
EVOLUTION n/a
LIFE FORMS Primitive single-cell organisms
EXAMPLES Mars, Mudd

Class L - Marginal

Class L planets are typically rocky, forested worlds devoid of animal life. They are, however, well-suited for humanoid colonization and are prime candidates for terraforming. Water is typically scarce, and if less than 20% of the surface is covered in water, the planet is considered Class H.

AGE 4-10 billion years ClassL3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Rocky, little surface water
ATMOSPHERE Argon, oxygen, trace elements
EVOLUTION n/a
LIFE FORMS Limited to vegetation
EXAMPLES Alarin III, Ciden II, Indri VII

Class M - Terrestrial

Class M planets are robust and varied worlds composed primarily of silicate rocks, and are highly suited for humanoid life. To be considered Class M, between 20% and 80% of the surface must be covered in water; it must have a breathable oxygen-nitrogen atmosphere and temperate climate.

AGE 4-10 billion years ClassM3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Abundant surface water, temperate climate
ATMOSPHERE Nitrogen, oxygen, argon
EVOLUTION n/a
LIFE FORMS Vegetation, animal, & humanoid
EXAMPLES Earth, Cardassia, Bajor, Vulcan

Class N - Reducing

Though frequently found in the Ecosphere, Class N planets are not conducive to life. The terrain is barren, with surface temperatures in excess of 500° and an atmospheric pressure more than 90 times that of a Class-M world. Additionally, the atmosphere is very dense and composed of carbon dioxide; water exists only in the form of thick,vaporous clouds that shroud most of the planet.

AGE 3-10 billion years ClassN3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE Barren, high temps.
ATMOSPHERE carbon dioxide and sulfides
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Venus

Class O - Pelagic

Any planet with more than 80% of the surface covered in water is considered Class O. These worlds are usually very warm and possess vast cetacean populations in addition to tropical vegetation and animal life. Though rare, humanoid populations have also formed on Class O planets.

AGE 3-10 billion years ClassO3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE 80% water, archipelagos
ATMOSPHERE Nitrogen, oxygen, argon
EVOLUTION n/a
LIFE FORMS Cetacean, humanoid, animal
EXAMPLES Azati Prime, Ka'Tula Prime, Zirat

Class P - Glaciated

Any planet whose surface is more than 80% frozen is considered Class P. These glaciated worlds are typically very cold, with temperatures rarely exceeding the freezing point. Though not prime conditions for life, hearty plants and animals are not uncommon, and some species, such as the Aenar and the Andorians, have evolved on Class P worlds.

AGE 3-10 billion years ClassP3.png
DIAMETER 10,000 - 15,000 km
LOCATION Ecosphere
SURFACE 80% frozen water, cold
ATMOSPHERE Nitrogen, oxygen
EVOLUTION n/a
LIFE FORMS Vegitation, Animal, Humanoid
EXAMPLES Andoria, Rura Penthe

Class Q - Variable

These rare planetoids typically develop with a highly eccentric orbit, or near stars with a variable output. As such, conditions on the planet's surface are widely varied. Deserts and rain forests exist within a few kilometers of each other, while glaciers can simultaneously lie very near the equator. Given the constant instability, is virtually impossible for life to exist on Class-Q worlds

AGE 2-10 billion years ClassQ3.png
DIAMETER 4,000 - 15,000 km
LOCATION Hot Zone/Ecosphere/Cold Zone
SURFACE Molten, frozen, jungle, etc
ATMOSPHERE Very tenuous to very dense
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Genesis Planet

Class R - Rogue

A Class R planet usually forms within a star system, but at some point in its evolution, the planet is expelled, likely the result of a catastrophic asteroid impact. The shift radically changes the planet's evolution; many planets merely die, but geologically active planets can sustain a habitable surface via volcanic outgassing and geothermal venting.

AGE 2-10 billion years ClassR3.png
DIAMETER 4,000 - 15,000 km
LOCATION Interstellar Space
SURFACE Temperate
ATMOSPHERE Primarily Volcanic Outgassing
EVOLUTION n/a
LIFE FORMS Non-photosynthetic plants, animals
EXAMPLES Founders' Homeworld (prior to 2371)

Class S - Gas Supergiant

Aside from their immense size, Class S planets are very similar to their Class J counterparts, with liquid metallic hydrogen cores surrounded by a hydrogen and helium atmosphere.

AGE 2-10 billion years ClassS3.png
DIAMETER 500,000 - 100,000,000 km
LOCATION Cold Zone
SURFACE Liquid metallic hydrogen
ATMOSPHERE Hydrogen and helium
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Tethe-Alla IV

Class U - Gas Ultragiant

Class U planets represent the upper limits of planetary masses. Most exist within a star system's Cold Zone and are very similar to Class S and J planets. If they are sufficiently massive (13 times more massive than Jupiter), deuterium ignites nuclear fusion within the core, and the planet becomes a red dwarf star, creating a binary star system.

AGE 2-10 billion years ClassU3.png
DIAMETER 50,000,000 - 120,000,000 km
LOCATION Cold Zone
SURFACE Liquid hydrogen, deuterium
ATMOSPHERE Hydrogen and helium
EVOLUTION Can evolve into red dwarf stars
LIFE FORMS None
EXAMPLES Diadem, Tethe-Alla V

Class X - Chthonian

Class X planets are the result of a failed Class T planet in a star system's Hot Zone. Instead of becoming a gas giant or red dwarf star, a Class X planet was stripped of its hydrogen/helium atmosphere. The result is a small, barren world similar to a Class B planet, but with no atmosphere and an extremely dense, metal-rich core.

AGE 2-10 billion years ClassX3.png
DIAMETER 1,000 - 10,000 km
LOCATION Hot Zone
SURFACE Barren, extremely hot
ATMOSPHERE None
EVOLUTION n/a
LIFE FORMS None
EXAMPLES Osirus

Class Y - Demon

Perhaps the most environmentally unfriendly planets in the galaxy, Class Y planets are toxic to life in every way imaginable. The atmosphere is saturated with toxic radiation, temperatures are extreme, and atmospheric storms are amongst the most severe in the galaxy, with winds in excess of 500 kph.

AGE 2-10 billion years ClassY3.png
DIAMETER 10,000 - 15,000 km
LOCATION Hot Zone
SURFACE Barren, extremely hot
ATMOSPHERE Turbulent, with toxic radiation
EVOLUTION n/a
LIFE FORMS Mimetic
EXAMPLES Planet Hell (Delta Quadrant), Visalayan (Medusan)

Disclaimer Notice

Page used with permission of USS Wolff CO - granted Nov 1, 2016
Images by Chris Adamek and used with permission from http://sttff.net/