* Nuclear Fusion: The Sun's core is the site of nuclear fusion, where hydrogen atoms fuse to form helium. This process releases enormous amounts of energy, causing the core to reach temperatures of around 27 million degrees Fahrenheit (15 million degrees Celsius).
* Energy Transport: The energy generated in the core is transported outward through the Sun by radiation and convection. As the energy moves outward, it encounters cooler layers, so the temperature decreases.
* Surface Temperature: The surface of the Sun, called the photosphere, has a temperature of about 10,000 degrees Fahrenheit (5,500 degrees Celsius). This is much cooler than the core due to the energy loss as it travels outward.
In short: The Sun's core is the hottest part, and the temperature decreases as you move outwards towards the surface.
