The sun has a hidden crown. Called the corona, this outer layer of the solar atmosphere can only be seen by the naked eye during total eclipses.
But there is one problem that has plagued scientists for decades: Why is it so extremely hot? The suns surface is “only” 6000 degrees celsius, while the corona is several million degrees.
“How can it get hotter and hotter, the further you get from the surface?” asks prof. Viggo Hansteen at the Institute of Theoretical Astrophysics at the University in Oslo. The answer probably lies in its spooky appearance.
“You’ll see them if you are lucky. The lines are created by the magnetic field. They might work like guitar stings, and bring energy into the corona when they are “plucked.”