Why is the sun’s corona so hot?
Today’s Video of the Day from NASA Goddard describes the mystery of the heat at the outermost region of the Sun’s atmosphere, or the corona, which spikes to temperatures of three million degrees Fahrenheit.
A thousand miles below the Sun’s surface the temperature is much cooler at only 10,000 degrees. The reason for this huge discrepancy, which has puzzled scientists for 150 years, is referred to as the coronal heating problem.
Video Credit: NASA Goddard