Photosphere: Explained

The photosphere is the outermost layer of the sun's atmosphere and is the part that emits the light that we see. It is composed of hot, dense gases and is the region from which most of the sun's radiation is emitted.

The photosphere has a granular appearance, which is caused by the convective motion of the gases beneath its surface. These granules are the tops of convection cells, where hot gases rise and cool gases sink back down.

The temperature of the photosphere is around 5,500 degrees Celsius (9,932 degrees Fahrenheit), and it is the layer of the sun that is most readily visible from Earth during a solar eclipse.

Study Guide: Photosphere

1. What is the photosphere?

The photosphere is the outermost layer of the sun's atmosphere and is the part that emits the light that we see.

2. What causes the granular appearance of the photosphere?

The granular appearance is caused by the convective motion of the gases beneath its surface. These granules are the tops of convection cells, where hot gases rise and cool gases sink back down.

3. What is the temperature of the photosphere?

The temperature of the photosphere is around 5,500 degrees Celsius (9,932 degrees Fahrenheit).

4. When is the photosphere most readily visible from Earth?

The photosphere is most readily visible from Earth during a solar eclipse.