noun
- the visible surface of the sun or another star from which light is emitted
Usage: astronomy
Examples
- The photosphere is the layer of the sun that we can see with our eyes.
- Sunspots appear as dark patches on the photosphere.
- The temperature of the sun’s photosphere is about 5,500 degrees Celsius.
- Solar flares originate from the photosphere and extend into the corona.
- Astronomers study the photosphere to understand stellar composition.
- The photosphere emits most of the sun’s visible light.