Video encyclopedia

Dyson sphere


What If We Built a Dyson Sphere Around the Sun?


The Dyson Sphere in Star Trek TNG Episode "Relics" (1987-1994)


The Enterprise Escaping From the Dyson Sphere


StarTrek: Dyson Sphere Discovery


Freeman Dyson - The Dyson sphere - hijacked by science fiction (138/157)

A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its power output. The concept is a thought experiment that attempts to explain how a spacefaring civilization would meet its energy requirements once those requirements exceed what can be generated from the home planet's resources alone. Only a fraction of a star's energy emissions reach the surface of any orbiting planet. Building structures encircling a star would enable a civilization to harvest far more energy.
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