A new study recommends we stop looking for megastructures and start searching for advanced civilizations who have moved multiple planets in their star's habitable zone.
.” According to Bernal, the source of the material for building such structures “would only be in small part drawn from the Earth; for the great bulk of the structure would be made out of the substance of one or more smaller asteroids, rings of Saturn or other planetary detritus.”,” where he described how a future advanced human civilization was “able to construct, out in space, artificial planets for permanent habitation.
“Dyson suggested that advanced ET civilizations could already have constructed such megastructures. These would be radiating the entire star’s energy chiefly in the narrow infrared range of 8 to 10 microns , so this should be the technosignature of such a structure, i.e., the stellar object with solar luminosity but all radiating in the IR.
This includes the rocky interior and metallic core, whereas hydrogen and helium could not be practically used as building materials. What’s more, the abundant hydrogen could be used in fusion reactors, offering a much simpler and practical solution to any energy crisis.
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