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The Kardashev Scale measures a civilizations technological advancement based upon its energy consuption. It was created by Nikolai Semenovich Kardashev, a Russian astrophysicist, in 1964.
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The Kardashev Scale measures a civilization's technological advancement based upon its energy consuption. It was created by Nikolai Semenovich Kardashev, a Russian astrophysicist, in 1964.
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== Type 0 ==
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== Scale ==
This civilization doesn't rank on the Kardashev Scale.
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== Type I ==
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A '''Type I''' civilization's energy usage meets or exceeds the available energy of an entire planet.
This civilization uses all the energy of its host planet and all the energy that reaches it from its star.
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== Type II ==
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A '''Type II''' civilization uses the entirety its host star's energy. Some proposed [[Megascale engineering|megascale structures]] are designed to enclose a star, implicitly making a civilization that constructs them at least a type II.
This civilization uses the entirety its host star's energy. (A concept being the [[Dyson Sphere]] or more realistically a [[Dyson Bubble]])
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== Type III ==
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A '''Type III''' civilization uses its host galaxy's entire energy output.
This civilization uses its host galaxy's entire energy output.
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=== Extensions ===
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== Type IV ==
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'''Type 0''' is often used to refer to civilizations with energy usage below Type I levels.
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This civilization uses the entire universe's energy output.
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[[Carl Sagan]] proposed a finer distincton to the scale by calculating consumption versus availability rates to create '''decimal types'''.  The resulting '''Kardaschev-Sagan scale''' requires explicit values for planetary, stellar, and galactic energy as well as total consumption rates.  With no other known civilizations, and these values rarely being specified even in hard [[Science fiction|science fiction]], decimal types are almost exclusively used in reference to [[Earth]].
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== Our status ==
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Terrestrial civilization currently rates below Type I on the original scale, and around a 0.72 on the Kardaschev-Sagan scale.
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== In fiction ==
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* [[Transmetropolitan]] #4 references an extended scale, criticizing its civilization for remaining at "Type 0" with its attendant social issues despite having developed the technological means to advance.
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* [[Dr Who]] at one point explicitly labels the Time Lord's society as "Type IV."
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== Type V ==
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This civilization uses a collective of universes energy output.
   
== External links ==
 
== External links ==
 
* {{Wikipedia|Kardashev scale}}
 
* {{Wikipedia|Kardashev scale}}
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* {{Wikipedia|Dyson sphere}}
 
[[Category:Posthumanism]]
 
[[Category:Posthumanism]]
 
[[Category:Futurism]]
 
[[Category:Futurism]]
 
[[Category:Space exploration]]
 
[[Category:Space exploration]]
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