The corona is only one millionth as bright as the sun visible to the naked eye.
In normal times, the scattered light from the atmosphere on the ground and the scattered light from observation instruments will greatly exceed the brightness of the corona itself and drown it.
But it has a temperature of one million degrees Celsius.
Luo Yu.
When I saw the solar corona in the compulsory geography textbook for the first year of high school, the first thing I thought of was you.