Definition of photosphere
1 : a sphere of light or radiance
2 : the luminous surface layer of the sun or a star
photosphericplay \ˌfō-tə-ˈsfir-ik, -ˈsfer-\ adjective
Recent Examples of photosphere from the Web
But just a few hundred miles above the photosphere, in the star's corona, the temperature suddenly jumps to several million degrees.
The visible surface of the sun, the photosphere, has a temperature of about 6,000 degrees Fahrenheit.
The photosphere has a temperature of between 4,500 and 6,000 degrees Kelvin, while the corona's temperatures are more like 1,000,000 or 2,000,000 K and can blaze as hot as 20,000,000 K in the right conditions.
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First Known Use of photosphere
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