* Sun's Temperature: The Sun's surface temperature is about 5,500 degrees Celsius (9,932 degrees Fahrenheit). Its core, where nuclear fusion takes place, reaches a staggering 15 million degrees Celsius (27 million degrees Fahrenheit).
* Earth's Mantle Temperature: The Earth's mantle, which lies between the crust and the core, has a temperature range of around 870 to 2,200 degrees Celsius (1,600 to 4,000 degrees Fahrenheit).
In summary, the Sun is many times hotter than the Earth's mantle. The Sun's immense heat comes from nuclear fusion, while the Earth's mantle heat comes from the decay of radioactive elements within the Earth.
