Sorry: both of these are incorrect. Everyone knows that the moon is actually made of cheese. Since it appears to be white, I suggest that the moon is actually a gigantic Camembert.
This therefore casts doubt on the sun actually being hot at all: if this were true, then the heat would melt the Camembert. It follows that the sun's rays are in fact cold, and it is the magnetic field of the Earth which actually converts the cold rays into heat.