While no aliens have been found (yet!), Dr. Marchis explained that a Dyson Sphere is a hypothetical megastructure built around a star by aliens to harness energy. While exciting, infrared excess could ...
A Dyson sphere would likely be a swarm of solar collectors rather than a solid shell. This "Dyson swarm" would be mechanically stable and resistant to damage. Dyson swarms could be detected by ...