
Now, the consensus answer is cold, 5 Kelvin or 3 Kelvin. But there are no molecules in outer space so what do the concepts of hot, cold, heat, energy even mean without the kinetic motion of molecules?
The International Space Station (diagram above) has not one, but a redundant pair of ammonia refrigerant cooling, air conditioning, refrigerating/freezing systems. Why? If space is cold? Why not just put that ice tray or margarita blender out on the back step and let outer space do its thang?















