I understand that there is no such thing as a perfect vacuum. To return to my Apollo CSM example, if you stuck a thermometer out into cislunar space, would it heat up or cool off, relative to your comfy internal environment? If space were "extremely cold," how could the CSM be heating up, thus necessitating the roll? Obviously, energy can be absorbed by the CSM and re-radiated without a solid carrier, like dust or gas. And the photons themselves technically do not have a temperature, neither hot nor cold. Yet by your reasoning, anything transported in from open space should be "extremely cold" to the touch.