Our yellow star
The chromosphere is the second out of the three main layers in the Sun's atmosphere. It is roughly 2,000 kilometers deep and is about 7800 degrees Fahrenheit. The density of the chromosphere is very low. This makes the chromosphere usually invisible and it can be seen only in a total eclipse, where its reddish color is revealed. However, without special equipment, the chromosphere cannot be seen due to the overwhelming brightness of the photosphere.
Sunspots are temporary phenomena on the photosphere that appear as dark spots. They have a reduced surface temperature compared to the surrounding photosphere. The occur 11-year solar cycle. Sunspots may last anywhere from a few days to a few months, but eventually disappear.