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Could we have already picked up evidence of alien Dyson spheres ?

By T.K. Randall
May 12, 2024 · Comment icon 7 comments
Dyson Sphere.
Can we pick up alien technosignatures from the Earth ? Image Credit: Midjourney
Analyzing astronomical data for evidence of alien technosignatures could point us to extraterrestrial civilizations.
Astronomers are currently on the look-out for signs of Dyson spheres and some even believe that data previously recorded by telescopes could already contain the evidence that they are looking for.

The concept of a Dyson sphere was first put forward over 50 years ago by the late physicist Freeman Dyson who proposed the possibility that a sufficiently advanced extraterrestrial race may be able to completely surround a star with a huge spherical structure and then live on the inside of the sphere.

Such a structure would be incomprehensibly large - akin to putting together something much larger than the Death Star from Star Wars - and with the added complexity of building it around a star.

It stands to reason, therefore, that it should be possible to observe evidence of something that big through a telescope, even if it happened to be situated many hundreds of light years away.
If we could find one, it could prove the existence of an advanced alien civilization.

To this end, an international team of researchers has developed a way to parse through huge amounts of existing astronomical data to identify potential Dyson sphere technosignatures.

Known as Project Hephaistos, the search is now well underway.

"A specialized pipeline has been developed to identify potential Dyson sphere candidates focusing on detecting sources that display anomalous infrared excesses that cannot be attributed to any known natural source of such radiation," the researchers wrote.

It will certainly interesting to see what, if anything, the team manages to come up with.

Source: | Comments (7)

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Recent comments on this story
Comment icon #1 Posted by Alchopwn 7 days ago
Could someone explain what sort of signatures a Dyson sphere might emit? 
Comment icon #2 Posted by Antigonos 7 days ago
According to the old SETI proposal for Project Cyclops, in a section devoted to scanning for theoretical techno signatures, a way to detect a potential Dyson sphere would be to look for the presence of molecules in the atmospheres of a solar system’s rocky planets unlikely to have a natural origin (like chlorofluorocarbons) which a Dyson sphere might produce as a byproduct of its activity (harnessing the energy of the parent star).
Comment icon #3 Posted by Abramelin 7 days ago
Quote: "This structure would emit waste heat in the form of mid-infrared radiation that, in addition to the level of completion of the structure, would depend on its effective temperature," Suazo and his colleagues write.
Comment icon #4 Posted by Tatetopa 6 days ago
Nice. Ever read Ringworld by Larry Niven? It would be a shocker to find one, but it would indicate somebody pretty smart and powerful once built it. Are they still around or a billion years gone?
Comment icon #5 Posted by Hankenhunter 6 days ago
That was a good book.
Comment icon #6 Posted by Poncho_Peanatus 2 days ago
but would waste heat not defeat the concept of a dyson sphere itself? I mean they harvest energy (heat) from a star, why would they let some slip away? I think we should look or gravitational anomalies instead.
Comment icon #7 Posted by L.A.T.1961 2 days ago
Yes, if there was evidence of bodies orbiting a measurable mass but no light or other emissions. But the system would be difficult to see without its star on show. A black star system.

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