To be fair, they have mirror surfaces inside. A more realistic prototype would be ultra-black for something like 10-50x better radiative heat transfer. Of course it would still be more like shitty insulation than like good conduction.

That's my water bottle. 10/10 would recommend for not passing temperature gradients.

this kind of sarcasm will go over their head. People truly don't understand vacuums

>Now does enough things go fast to make any sense...

You're worried about rates when we can't even get the ball rolling on safety for human occupancy, maintenance, workability.

I swear, nothing on Earth more dangerous than someone with dollar signs in their eyes.

Heat conduction requires a medium, but radiation works perfectly fine in a vacuum. Otherwise the Sun wouldn't be able to heat up the Earth. The problem for spacecraft is that you're limited by how much IR radiation is passively emitted from your heat sinks, you can't actively expel heat any faster.

Hot objects emit infrared light no matter the conditions. The hotter the object, the more light it throws off. By radiating this light away, thermal energy is necessarily consumed and transformed into light. It's kind of wild actually

There is some medium in low Earth orbit. Not all vacuums are created equal. However, LEO vacuum is still very, very sparse compared to the air and water we use for cooling systems.

The main way that heat dissipates from space stations and satellites is through thermal radiation: https://en.wikipedia.org/wiki/Thermal_radiation.

"just as well"?

I man you totally can radiate excess heat energy on earth, but your comment implies that the parents idea of radiating off excess "energy", specifically HEAT energy in space is possible, which it isn't.

You can radiate excess energy for sure, but you'd first have to convert it away from heat energy into light or radio waves or similar.

I don't think we even have that tech at this point in time, and neither do we have any concepts how this could be done in theory.