Why technosignatures from solar panels might be unlikely

Date:

August 8, 2024

View larger. | Artist’s concept of an exoplanet home to an alien civilization. Structures on the right are orbiting solar panel arrays that harvest light from the parent star and convert it into electricity. That energy is then beamed to the surface via microwaves. Scientists said technosignatures – signs from an advanced alien civilization – from solar panels may be tough to spot. Image via NASA/ Jay Freidlander.

Technosignatures are signs of alien technology. Astronomers have spoken of trying to detect large-scale solar panel arrays on an alien planet’s surface, or star-energy-gathering megastructures in space (Dyson spheres).
But a new study suggests it’s unlikely we’ll find technosignatures from solar panels or megastructures built by an advanced alien civilizations.
That’s partly due to modest energy needs of even a large civilization. For example, the study calculated that a population of 30 billion at a…

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