how hot is our sun

The Sun's temperature varies depending on the layer being measured. The surface of the Sun, called the photosphere, is about 5,800 kelvin (approximately 10,000 degrees Fahrenheit or 5,500 degrees Celsius). However, the core of the Sun is much hotter, reaching temperatures around 15 million kelvin (about 27 million degrees Fahrenheit or 15 million degrees Celsius), where nuclear fusion takes place. Interestingly, the outer atmosphere of the Sun, known as the corona, can be even hotter than the surface, reaching temperatures of up to 1 to 2 million kelvin (about 1.8 to 3.5 million degrees Fahrenheit).