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! Description |
! Description |
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! Examples <!-- |
! Examples <!-- |
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| − | ! Age<br>(bil. yrs) |
+ | ! Age<br />(bil. yrs) |
| − | ! Diameter<br>(1,000 kms) |
+ | ! Diameter<br />(1,000 kms) |
! [[Atmosphere]] |
! [[Atmosphere]] |
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! [[Solar system]] zone |
! [[Solar system]] zone |
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|- |
|- |
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! [[Class D]] |
! [[Class D]] |
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| − | | [[Planetoid]] or [[moon]]; |
+ | | [[Planetoid]] or [[moon]]; little to no atmosphere. Uninhabitable. |
| − | | [[ |
+ | | [[Regula]], [[Weytahn]] <!-- |
| 2 to 10 |
| 2 to 10 |
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| 0.1 to 4 |
| 0.1 to 4 |
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<!-- |
<!-- |
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! [[Class F planet|Class F]] |
! [[Class F planet|Class F]] |
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| − | | [[geology|geologically]] inactive and no [[atmosphere]] |
+ | | [[geology|geologically]] inactive and no [[atmosphere]]. |
| [[Janus VI]] |
| [[Janus VI]] |
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| 1 to 3 |
| 1 to 3 |
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| --> |
| --> |
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! [[Class H]] |
! [[Class H]] |
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| − | | Generally uninhabitable |
+ | | Generally uninhabitable. |
| [[Tau Cygna V]] <!-- Desert |
| [[Tau Cygna V]] <!-- Desert |
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| [[Nimbus III]] |
| [[Nimbus III]] |
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! [[Class K planet|Class K]] |
! [[Class K planet|Class K]] |
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| Adaptable with [[pressure dome]]s |
| Adaptable with [[pressure dome]]s |
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| − | | [[Mudd]], [[Theta |
+ | | [[Mudd]], [[Theta VIII]], [[Mars]] (class K [[transjovian]]) <!-- , [[Elba II]]Adaptable |
| 4 to 10 |
| 4 to 10 |
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| 5 to 10 |
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|- |
|- |
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! [[Class L]] |
! [[Class L]] |
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| − | | Marginally habitable |
+ | | Marginally habitable. No animal life. Only vegetation life. |
| [[Indri VIII]] <!-- |
| [[Indri VIII]] <!-- |
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| 4 to 10 |
| 4 to 10 |
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|- |
|- |
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! [[Class M]] |
! [[Class M]] |
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| − | | Terrestrial |
+ | | Terrestrial |
| − | | [[Earth]] |
+ | | [[Earth]], {{dis|Vulcan|planet}}, [[Cardassia Prime]], [[Risa]], [[Bajor]] <!-- , [[Bajor]] [[Delta Vega]] |
| 3 to 10 |
| 3 to 10 |
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| 10 to 15 |
| 10 to 15 |
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! [[Class T planet|Class T]] |
! [[Class T planet|Class T]] |
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| [[Gas giant]] |
| [[Gas giant]] |
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| − | | |
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|- |
|- |
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! [[Class Y planet|Class Y]] |
! [[Class Y planet|Class Y]] |
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| "Demon" |
| "Demon" |
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| − | | [[Silver Blood]] |
+ | | [[Class Y planet|Silver Blood planet]], [[Elba II]] |
| − | | 2 to 10 |
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| − | | 10 to 15 |
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| − | | [[Thermionic radiation]] |
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| − | | All |
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| − | | Mimetic --> |
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|- |
|- |
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|} |
|} |
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| + | == Appendices == |
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| − | ==Conjectural planetary classes== |
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| + | === Background information === |
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The ''[[Star Trek: Star Charts]]'' book, which was authored and advised by ''Trek'' staffers, listed many other planetary classes which may one day be recognized on-screen, but as of now they remain conjectural. |
The ''[[Star Trek: Star Charts]]'' book, which was authored and advised by ''Trek'' staffers, listed many other planetary classes which may one day be recognized on-screen, but as of now they remain conjectural. |
||
One such was "Class F", which was [[geology|geologically]] inactive with no [[atmosphere]]. [[Janus VI]] was given as an example of this. |
One such was "Class F", which was [[geology|geologically]] inactive with no [[atmosphere]]. [[Janus VI]] was given as an example of this. |
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| − | According to the ''Star Charts'', a '''Class P''' planet is a "glaciated" planet. They have an age that ranges from three to ten billion years and a diameter between 10,000 to 15,000 kilometers. Class P planets are located in the ecosphere of a [[ |
+ | According to the ''Star Charts'', a '''Class P''' planet is a "glaciated" planet. They have an age that ranges from three to ten billion years and a diameter between 10,000 to 15,000 kilometers. Class P planets are located in the ecosphere of a [[star system]]. A glaciated planet is categorized by a surface comprised of 80%+ [[water]] ice and an atmosphere consisting of [[nitrogen]], [[oxygen]] and trace [[element]]s. [[Lifeform]]s found on class P planets include hardy [[plant|vegetation]], [[animal]] life, and occasionally native [[humanoid]]s. It is widely believed that [[Breen (planet)|Breen]] is also a class P planet. However, according to [[Weyoun]], it was in fact a lush world with a temperate climate, in which case it would have to be categorized as class M. ({{DS9|When It Rains...}}) |
Examples of class P planets: |
Examples of class P planets: |
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* [[Rigel X]] |
* [[Rigel X]] |
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* [[Psi 2000]] |
* [[Psi 2000]] |
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| + | |||
| + | === External link === |
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| + | * {{eas|database/planet_classes.htm|Planet classification|external}} |
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[[bg:Планетна класификация]] |
[[bg:Планетна класификация]] |
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[[nl:Planetaire classificatie]] |
[[nl:Planetaire classificatie]] |
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[[pl:Klasyfikacja planet]] |
[[pl:Klasyfikacja planet]] |
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| + | [[ru:Система классификации планет]] |
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| + | [[Category:Planets| ]] |
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[[Category:Academic disciplines]] |
[[Category:Academic disciplines]] |
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| − | [[Category: |
+ | [[Category:Astronomical classifications| ]] |
Revision as of 11:18, 15 December 2015
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.
Planetary classes
| Class | Description | Examples |
|---|---|---|
| Class D | Planetoid or moon; little to no atmosphere. Uninhabitable. | Regula, Weytahn |
| Class H | Generally uninhabitable. | Tau Cygna V |
| Class J | Gas giant | Jupiter, Saturn |
| Class K | Adaptable with pressure domes | Mudd, Theta VIII, Mars (class K transjovian) |
| Class L | Marginally habitable. No animal life. Only vegetation life. | Indri VIII |
| Class M | Terrestrial | Earth, Vulcan, Cardassia Prime, Risa, Bajor |
| Class N | Sulfuric | Venus |
| Class T | Gas giant | |
| Class Y | "Demon" | Silver Blood planet, Elba II |
Appendices
Background information
The Star Trek: Star Charts book, which was authored and advised by Trek staffers, listed many other planetary classes which may one day be recognized on-screen, but as of now they remain conjectural.
One such was "Class F", which was geologically inactive with no atmosphere. Janus VI was given as an example of this.
According to the Star Charts, a Class P planet is a "glaciated" planet. They have an age that ranges from three to ten billion years and a diameter between 10,000 to 15,000 kilometers. Class P planets are located in the ecosphere of a star system. A glaciated planet is categorized by a surface comprised of 80%+ water ice and an atmosphere consisting of nitrogen, oxygen and trace elements. Lifeforms found on class P planets include hardy vegetation, animal life, and occasionally native humanoids. It is widely believed that Breen is also a class P planet. However, according to Weyoun, it was in fact a lush world with a temperate climate, in which case it would have to be categorized as class M. (DS9: "When It Rains...")
Examples of class P planets: