The center of the Sun is a core that is about 1390,000 kilometers (864,000 miles) in diameter. This core is incredibly dense and hot, with a temperature of 15 million degrees Celsius (27 million degrees Fahrenheit).

The Sun's core is where nuclear fusion takes place, a process that releases immense amounts of energy in the form of light and heat. This energy is what makes the Sun shine and provides energy to Earth and the other planets in our solar system.