The Solar Corona Is Much Cooler Than The Sun Surface

Clear evidence now suggests that the intense heat of the sun s atmosphere depends on explosive bursts not continuous heating.

The solar corona is much cooler than the sun surface.

Abstract the processes that heat the solar and stellar coronae to several million kelvins compared with the much cooler photosphere 5 800 k for the sun are still not well known1. She likens it to walking away from a campfire and feeling colder and colder until suddenly getting very hot. The temperature in the corona is a blistering million or so degrees celsius. But the temperature at the sun s surface the source of that energy is a relatively balmy 5 500 degrees.

The temperature in the corona is a blistering million or so degrees celsius. It s just weird says winebarger.