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this post was submitted on 19 Oct 2025
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TechTakes
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Big brain tech dude got yet another clueless take over at HackerNews etc? Here's the place to vent. Orange site, VC foolishness, all welcome.
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@froztbyte "vacuum is an insulator" oh well TIL
@BlueMonday1984
Yeah heat management in space turns out to be pretty fucking hard. You could ask “who knew?!” but there’s that whole space program thing…
I presume that they’re not in fact blind to this fact, mind you. You cannot be doing actual astro tech design without it (your object would never make it to launch - there’s too many blockers that’d stop it), but the properties of heat generation from a H100 are known, and thus whatever they’re applying to deal with it very can’t be lightweight/little
@froztbyte thats one thing but im still interested in the physics of the insulatory effects of the vacuum 👀
@xyhhx @froztbyte “vacuum is an insulator” is what makes a high-quality double-walled thermos high quality — there is no air between the outer and inner walls
@benchase oh shit, i knew that (when shopping for water bottles) but didn't put two and two together
@froztbyte
exactly so :)
no matter means no heat transmission through conduction (=particle motion), only radiation
@Reach_the_man so wait, is not heat a form of energy (or a result thereof)? can energy not dissipate through a vacuum?
or is it that the energy dissipates less effectively when it can't transfer itself *as heat* through a medium?
heat is describing the average kinetic energy of the material's particles, with no contact it can't transfer as kinetic energy, only through photons emitted
@Reach_the_man that clears it up for me! thanks for taking the time to answer