I'm not sure that I'll get the English terms wrong but basically heat can move in three ways:
- By convection, aka liquids and gases moving around when theire heated. Obviously this doesn't happen in space
- By conduction, a hot thing thouches a cold one and heat transfers from hot to cold. And, this neither works in space
- By radiaton. Hot objects radiate heat as electro magnetic waves (ie ligth). This is the only one that works in a vacuum and this process is rather slow. Also this results I the weird phenomenon that good looking people cool down faster in space since their hoter. Therefore we should only recruit bad looking astronauts, but no one seems to have figured that out
Yws, and that would be the goal of the little boy that's playing the game