What is the approximate core temperature of the Sun in degrees Celsius?
Answer
15 million degrees Celsius
The internal temperature at the very center, or core, of the Sun reaches an extreme value of approximately 15 million degrees Celsius. This immense heat, combined with the crushing pressure generated by the star's massive gravity, is the precise condition necessary to drive the proton-proton chain reaction—the mechanism of hydrogen fusion. This temperature is vastly higher than the Sun's measured surface temperature, which is approximately 5,778 Kelvin. The core temperature is the engine room of the star, dictating the rate at which mass is converted into energy.
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