* Core: The Sun's core is the hottest part, reaching a scorching 15 million degrees Celsius (27 million degrees Fahrenheit). This intense heat is what drives nuclear fusion, the process that powers the Sun.
* Photosphere: This is the visible surface of the Sun that we see. Its temperature is around 5,500 degrees Celsius (9,932 degrees Fahrenheit).
* Chromosphere: This is the layer above the photosphere, and its temperature is much hotter, ranging from 4,300 to 16,000 degrees Celsius (7,772 to 28,832 degrees Fahrenheit).
* Corona: The outermost layer of the Sun's atmosphere extends millions of kilometers into space. Surprisingly, it's the hottest part, reaching millions of degrees Celsius (millions of degrees Fahrenheit).
So, while the Sun's average surface temperature is around 5,500 degrees Celsius, its internal temperature is far hotter, and its corona reaches even higher temperatures.
