We can expect the functional relationships to be different for the three different transfer mechanisms. As an example consider the human body. We have an internal supply of energy which we maintain through eating. We tend to talk of space being cold but we need to be clear what we are talking about. Does the Earth have an internal supply of heat which keeps it warm or is it warmed by something else.
Space is only cold in places far removed from stars.
As discussed above, the temperature of a body is determined by a consideration of the inflow and outflow of heat. See if you can show by calculation from this that the Earth's temperature is what we observe it to be. If you need help click here . This is so because the heat is very effectively transported from the hot side of the Earth to the cold side by the atmosphere. When this motion is coupled with the motion of the spinning Earth we get a circulation of air which we call the weather .