it is possible to build a structure that indicates the existence of an alien civilization

American physicist and mathematician Freeman Dyson coined the term Dyson sphere in the 1960s, which has kept astronomers excited ever since. In theory, the name covers a huge structure that an alien civilization could build around a star to harness its full energy.

In recent decades, researchers have tried to find traces of such a structure, but have so far been unsuccessful, and scientists are currently debating whether it would really be possible to build a Dyson sphere. Researchers at the University of Glasgow are also actively dealing with the topic, and based on their recent analysis, they concluded that alien structures built to collect stellar energy or change the orbits of stars could be physically feasible, writes the Science Alert.

The researchers also stated that these structures can remain stable for millions of years. About all of this Monthly Notices of the Royal Astronomical Society a publication was published in the scientific journal

Scientists envision so-called stellar engines built around stars as huge, light-reflecting structures that are gravitationally bound to a host star. Its simplest version would be a flat disc, although Colin McInnes, a scientist at the university, thinks a ring version might be more stable.

https://hvg.hu/tudomany/20210831_foldonkivuliek_dyson_gomb_fekete_lyukak

These devices could be used by an alien civilization to move the entire star system with the pressure exerted by the radiation of the stars, for example to avoid a cosmic catastrophe. The Dyson Sphere, on the other hand, consists of a dense array of devices capable of collecting and harnessing the star’s light and then providing energy—more than any planetary-scale process can provide.

Such devices could ensure the survival of an advanced civilization in the event that their own planet becomes uninhabitable.

According to McInnes’ modelling, both star engines and Dyson spheres have versions that would allow them to remain stable. It is currently unknown whether they exist, but it is possible that humanity will one day come across such a structure while observing the universe. According to McInnes, it can be telling if a given star produces unexpected infrared wavelength emissions despite its properties, or shows oddities in its spectral fingerprint that cannot be explained by anything.

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