I was being a smartass, but if you insist... your comment is incorrect throughout. The paper refers to "earthshine" which today is dominated by reflected sunlight. But the point of that paper is that right after the collision that created the moon, earthshine was dominated by radiated heat from the Earth, not reflected radiation from the sun, meaning that the earthshine was much more intense than today. The takeaway from the paper is literally the opposite of what your post said:
"The actual study [did] say RADIANT heat from the Earth, [in complete obeyance of the laws of physics], went through the vacuum of space." This radiant heat kept the Earth facing side of the moon molten longer than the far side.