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Space
Space
Science
Keith Cooper

What are Dyson spheres, and how do we look for them?

Freeman Dyson Scotty Stuart Armstrong Earth Mercury Extraterrestrial Jupiter Sun
Graphic illustration of a dyson sphere concept showing a partially constructed sphere with an orange glow emanating from inside. .

Dyson spheres are hypothetical artificial megastructures built around a star to collect all of its radiant energy. 

In theory, detecting a Dyson sphere could be a way to find a technologically advanced alien civilization that did not wish to communicate. 

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