The Sun

How hot is the Sun?

The temperature at the center of the Sun is about 27 million degrees Fahrenheit (15 million degrees Kelvin). This is typical for stars that convert hydrogen into helium using the proton-proton chain, but it is hotter than some stars and much cooler than others. This is especially true if these other stars harbor fusion processes other than the proton-proton chain, such as the carbon-nitrogen-oxygen cycle or the triple-alpha reaction.

The temperature at the surface of the sun is about 11,000 degrees Fahrenheit (5,800 degrees Kelvin). The surface temperatures of stars range typically from about 5,400 to 54,000 degrees Fahrenheit (3,000 to 30,000 degrees Kelvin), though in some special kinds of stars the surface temperatures can be higher or lower than this range.


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