What approximate temperature does the Sun's visible layer, the photosphere, maintain?
Answer
Around 10,000 degrees Fahrenheit (5,500 degrees Celsius)
The visible boundary of the Sun, known as the photosphere, operates at a temperature significantly lower than the star's interior, though still immensely hot by terrestrial standards. The temperature measured at this outer, light-emitting skin is approximately 10,000 degrees Fahrenheit, which is equivalent to 5,500 degrees Celsius. This temperature is still far beyond the melting or boiling points of nearly all known substances. For context, the Sun's core reaches a staggering 27 million degrees Fahrenheit, illustrating the massive temperature gradient from the center to this observable surface layer.
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