Dyson sphere

A hypothetical structure built around a star to capture its energy.

A thought experiment from 1960: a civilisation that needed more energy than a planet receives might surround its star with collectors, dimming it in visible light and warming it in the infrared. It is on this site because it was raised for Tabby's star, and because the test it implies, excess infrared, was done: there is none.

Where it comes up

Tabby's star (KIC 8462852)

Artificial megastructures were proposed as a hypothesis to be tested, not a conclusion, and predicted grey (colour-independent) dips for large opaque structures . The chromatic dips and the null technosignature…

Cite it

Mysteries Department. (2026). Dyson sphere [Concept CPT0DECW03DJM9T]. https://mysteriesdept.com/r/CPT0DECW03DJM9T

@misc{mysteriesdept_cpt0decw03djm9t,
  title     = {Dyson sphere},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Concept, catalog key CPT0DECW03DJM9T},
  url       = {https://mysteriesdept.com/r/CPT0DECW03DJM9T}
}