Comment by Charles Honkai 3rd Player on Mezametara saikyou soubi to uchuusen-mochi datta no de, ikkodate mezashite youhei toshite jiyuu ni ikitai - Chapter 6.1: (Part two)

@Charles Honkai 3rd Player this was supposed to have something, but it was erased automatically, so just look for the continuation at the next comment from me.

so infuriating

@Charles Honkai 3rd Player  this answeris from quora:
The reason is, that a hot body loses its heat by three processes:
1) Conduction
2) Convection
3) Radiation.

So, assuming that you leave your hot coffee pouch floating in space, there is no way it can lose heat by conduction and convection.

@Charles Honkai 3rd Player

 still from quora
But it can radiate the heat out! Radiating heat doesn't need any material medium to travel. The coffee pouch will radiate the heat in the form of electromagnetic waves(mostly infrared ). And hence, its temperature will certainly decrease, till it reaches the cosmic background temperature,which is around 2.7K (i.e. -270.3 degree Celcius). (Cosmic background temperature is kind of the neutral temperature of space. )

Again, I'm assuming that your coffee pouch isn't near any star. 

If you bring Sun into the picture, then, assuming that the coffee pouch is somewhere near the Earth( but out of the atmosphere), the coffee pouch will receive some heat from the Sun( again in the form of radiation) and will lose its own heat as well. At the equilibrium, its temperature will be around 7 degree Celcius.

However, bring your coffee pouch somewhere really close to a star, say near its surface, then heat gained by the star's radiating energy will be many-many times greater than the heat lost by it, and hence it will start heating up instead of cooling, and will heat up so badly that the coffee will evaporate into steam, bursting the pouch and then the pouch itself will evaporate, and then both of them will atomize, then the atoms will ionize, into plasma, and then may the spirit of your coffee (and the pouch) rest in peace :)

Me: If you think that you are correct if you think you are. Go and research to fact check, cause it will come and stab you in the back later if you said something wrong to another that you thought was the truth. While in reality it is wrong, just here to provide help if i can

@Charles Honkai 3rd Player   I would quickly like to thank you for going out of your way to explain this

@Charles Honkai 3rd Player i think thermal stealth would work if his heat signature is <= to the debris heat. He doesn't really need to match them. Trash mob pirate only gonna look for standard heat signature of active ship in a fight. Hiding in debris is mostly to avoid radar sweep.