Well, a sunspot is not really dark but it is at a lower temperature than the surrounding gases on the surface of the Sun. So it only looks dark by contrast with the area round it.
A sunspot is about 1200 degrees (Celsius, or Kelvin) colder than its surroundings.
Sunspots.
They are transitory.
solar flares appear as a dark spot
No. That spot is light and it is day.
A "sunspot."
Sunspots. They are only "cool" relative to the rest of the Sun.
Yes I have seen a dark spot on the Sun. It is called a "Sunspot". It is formed on the Sun's surface which is called the "photo-sphere" and is caused by a loop of the Sun's magnetic field poking though the Sun's surface.
Sunspots
He looked at the sun and observed dark blemishes on its surface, which are now called sunspots. From the movement of these, he was able to determine that the sun has a rotation period of about one month.
The dark sun will not appear in real life, it is part of the video game Dungeons and Dragons. It is a campaign setting which feature a fictional desert world of Athas.
The cooler dark spots on the sun are called sunspots.
Sunspots