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Astronomers are on the Hunt for Dyson Spheres
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this post was submitted on 11 May 2024
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But you would still be radiating heat from that star system unless you're proposing wireless energy transfer over Interstellar distances. So the entire system would still give off an unusually high infrared signature.
I'm not proposing that - I literally wrote my idea in the comment you replied to: a potential alien civilization could charge up batteries at their Dyson sphere, and use the energy anywhere else in the galaxy. You know, the way EVs work.