Why Is the Sun's Corona So Much Hotter Than Its Surface?

💡 The Answer

• The Sun's corona reaches temperatures of millions of degrees Kelvin.
• In contrast, the visible surface is only about 5,500 degrees Celsius.
• This paradox has puzzled scientists for decades, known as coronal heating.
• One leading theory involves nanoflares caused by magnetic reconnection.
• Another theory suggests waves from the surface transfer energy upward.