What is the temperature of the sun's center?
The temperature on the Sun's surface (photosphere) is 5,500 degrees Celsius.
In the center (core), the temperature is an incredible 15,000,000 (15 million) degrees Celsius.
the sun's energy comes from nuclear fusion. in the process of nuclear fusion, hydrogen atoms join together to form helium. nuclear fusion occurs only under conditions of extremely high temperature and pressure. the temperature inside the suns core or center reaches about 15 million degrees Celsius, high enough for nuclear fusion to occur.