@[email protected] to [email protected] • 2 months agoAstronomers are on the Hunt for Dyson Sphereswww.universetoday.commessage-square76fedilinkarrow-up1220cross-posted to: [email protected]
arrow-up1220external-linkAstronomers are on the Hunt for Dyson Sphereswww.universetoday.com@[email protected] to [email protected] • 2 months agomessage-square76fedilinkcross-posted to: [email protected]
minus-square@[email protected]linkfedilinkEnglish3•2 months agoBecause all that energy contains heat as well, and you’ll need to balance the heat from your star along with the energy absorbed. You’re never going to get to 100% efficient conversion, so you’ll have to radiate away the heat so your sphere doesn’t melt or something.
minus-square@[email protected]linkfedilink1•2 months agoSure, you won’t reach 100%. But say you reach 99.9% - the Dyson sphere should radiate infrared at 0.1% of a normal star, right? It wouldn’t necessarily be bright.
minus-square@[email protected]linkfedilink1•2 months agoNot all heat can be converted to work by the second law of thermodynamics. Now the question is, how hot can the star be for it to sustain life? Can most of its light be UV with very little visible? https://courses.lumenlearning.com/suny-physics/chapter/15-4-carnots-perfect-heat-engine-the-second-law-of-thermodynamics-restated/
minus-square@[email protected]linkfedilinkEnglish1•edit-22 months agoThey must be mining a lot of bitcoin to need 99.9% of a star’s energy. Or else to power one of those Kurtzgestat space lasers that will melt us anyway.
minus-square@[email protected]linkfedilink1•2 months agoMaybe they are just fabricating matter. That takes a surprising amount of energy!
Because all that energy contains heat as well, and you’ll need to balance the heat from your star along with the energy absorbed.
You’re never going to get to 100% efficient conversion, so you’ll have to radiate away the heat so your sphere doesn’t melt or something.
Sure, you won’t reach 100%. But say you reach 99.9% - the Dyson sphere should radiate infrared at 0.1% of a normal star, right? It wouldn’t necessarily be bright.
Not all heat can be converted to work by the second law of thermodynamics. Now the question is, how hot can the star be for it to sustain life? Can most of its light be UV with very little visible? https://courses.lumenlearning.com/suny-physics/chapter/15-4-carnots-perfect-heat-engine-the-second-law-of-thermodynamics-restated/
They must be mining a lot of bitcoin to need 99.9% of a star’s energy.
Or else to power one of those Kurtzgestat space lasers that will melt us anyway.
Maybe they are just fabricating matter. That takes a surprising amount of energy!