We can make a precise calculation of the temperature of heaven using a physical law in thermodynamics called Stefan – Boltzmann law.

This gives the power radiated from a black body (an idealized physical body that absorbs all incident electromagnetic radiation) given its temperature.

The bible gives a clue as to the temperature of heaven from, Isiah 30:26

Moreover the light of the moon shall be as the light of the sun, and the light of the sun shall be seven fold, as the light of seven days

So, heaven receives from the moon as much radiation as we do from the sun and in addition seven times seven (i.e 49 times) as much as earth does from the sun.

This gives 50 times in all!, this radiation falling on heaven heats it to the point where the heat loss by re-radiation Ø just equals the heat received by radiation.

From Stefan – Boltzmann law 4th power law we have (Ø /Τ ). Taking Τ (the absolute temperature of earth) as 300 K, we obtain a temperature of 798, or about 525 Celsius.

It is tempting to compare this unexpectedly warm temperature with that of hell.

Although we cannot be exact about the temperature of hell, we can conclude an upper limit, Revelations 21:8 reads

But the fearful and unbelieving …shall have their part in the lake which burneth with fire and brimstone…

The boiling point of brimstone (Sulfur) is 444.6 degrees c, which means that the temperature of such an eternal lake must be less than 444.6 degrees c, (otherwise it would evaporate). There fore, as 444.6 is much less than 525.0 we are forced to conclude by physical and biblical data that heaven is hotter than hell.