Sun spots.
sun spots
We call them sunspots, but dark and cool are relative terms. A sunspot is dark only relative to the surrounding solar surface, but still intensely bright compared to your common household light bulb. It's cooler than the surrounding solar material, but still hot enough to vaporize a spaceship and anyone inside it in a fraction of a second.
Dark spots on the Sun are called sunspots. (You knew that was coming, didn't you?)
These are called sun spots.
The black spots on the photosphere of the sun are called sunspots.
They are called Sunspots
Sun spots!
They are called sunspots.
They are called Sunspots
They are called Sunspots
they are called the sun spots