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Kardashev Civilizations



Three types of civilizations have been postulated by Nikolai Kardashev for the development of a "super civilization":


Type I

A civilization in a similar stage of development as Earth, having control of most of the energy sources of the planet of origin (~ 4 x 1012 W).


Type II

A civilization having reached a level of development at which it controlled the energy output of its own star (~ 4 x 1026 W). This is the civilization that is first capable of constructing a "Dyson Sphere".


Type III

A civilization which has gained control of the energy output of the entire galaxy (~ 4 x 1037 W).


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