A group of international astronomers from Sweden, India, and the USA has identified signs of so-called Dyson spheres around seven stars, indicating the existence of extraterrestrial civilizations. Their findings were published in the scientific journal Monthly Notices of the Royal Astronomical Society.
The researchers studied the radiation emitted by stars, which was captured by the Gaia, 2MASS, and WISE telescopes. Stars that could hypothetically possess Dyson spheres emit excess infrared radiation, detectable from Earth. Since such structures could only be built by highly advanced alien civilizations, studying the potential radiation from these objects is one of the main methods of searching for extraterrestrial life.
Astronomers were able to detect seven visible M-dwarfs that showed excess radiation of unknown origin, corresponding to the Earth model of a Dyson sphere.
According to the scientists, existing theories do not explain the excess radiation observed from these stars. Now, researchers aim to investigate these objects further using more powerful telescopes to refine the presence of this hypothetical sign of extraterrestrial life.
The concept of potential astroengineering constructions built by highly advanced extraterrestrial civilizations was first proposed over half a century ago by the American theoretical physicist Freeman Dyson. He suggested that civilizations could surround their star with a sphere to harness all of its energy. This concept became known as the “Dyson sphere.”
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