The photo above was captured by astrophotographer Arturo Buenrostro using a special hydrogen-alpha filter, which allows us to see the Sun in a very specific wavelength of light. This wavelength is emitted by glowing hydrogen gas in the Sun's chromosphere, the layer just above the Sun's surface.

In the image, we can see many interesting features of the Sun's surface, including:

Granules: These are small, bright cells that are caused by convection currents in the Sun's plasma. They are typically about the size of Texas.

Sunspots: These are dark, cool regions on the Sun's surface that are caused by strong magnetic fields. The dark cores of sunspots can be thousands of kilometers wide.

Prominences: These are bright, looping features that erupt from the Sun's surface. They are made of hot plasma that is trapped in the Sun's magnetic field.