NASA’s Webb Telescope Rules Out Two New Dyson Sphere Candidates

Recent searches for the technosignatures of hypothetical Dyson Spheres again turn up empty.

The top 3

Dyson Sphere: Stellar Energy Collector: Proposed by physicist Freeman Dyson in 1960, a Dyson Sphere (or more practically, a Dyson Swarm) is a hypothetical megastructure designed to completely encompass a star to capture its entire energy output for an advanced civilization.
Matrioshka Brain: Star-Powered Supercomputer: Proposed by Robert J. Bradbury in 1997, a Matrioshka Brain is a hypothetical megastructure consisting of nested Dyson spheres designed to harness a star's entire energy output to power an immense, star-sized computer, potentially for advanced AI.
Shkadov Thruster: Moving Star Systems: Proposed by Leonid Shkadov in 1987, a Shkadov Thruster is a hypothetical stellar engine that uses a colossal orbital mirror to reflect a star's radiation, creating asymmetrical pressure to slowly accelerate and move the entire star system through space.