3 ms·The megastructures would have to radiate waste heat if they're doing anything interesting.by Symmetry 7y agoThe megastructures would have to radiate waste heat if they're doing anything interesting.Iv 7y agoWell, there are a lot of brown dwarfs around...Symmetry 7y agoTheir spectra look like giant burning balls of gas, though. I guess it's possible to hide one inside a star in theory?