Because they are cooler than the rest of sun's surface.Even though the spots are cooler,They are still 6000 degrees.The other surface of sun is 10000 degrees.
The dark area is known as a sunspot on the Sun's surface. Sunspots appear darker because they are cooler than their surroundings. They are caused by strong magnetic activity that inhibits convection and reduces temperature.
The darkest part, where the magnetic field is approximately vertical to the sun's surface is called the Umbra.
A sunspot can appear dark because it is cooler than the surrounding areas of the Sun's surface, with temperatures around 3,000 to 4,500 degrees Celsius compared to about 5,500 degrees Celsius for the Sun's photosphere. Although sunspots emit less light due to their lower temperature, they can still be bright in absolute terms when compared to other celestial objects. The contrast with the brighter, hotter surrounding regions makes them appear dark to our eyes.
An example of a sunspot is the group of dark spots visible on the Sun's surface, caused by intense magnetic activity. Sunspots appear darker than their surrounding regions due to their lower surface temperatures. They usually occur in regions of strong magnetic fields on the solar surface.
A cool, dark area on the sun's surface is called a sunspot. Sunspots are areas of reduced temperature that appear dark against the brighter background of the surrounding solar surface because they are regions of concentrated magnetic field flux inhibiting convective flow.
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.
Umbra.
The dark area is known as a sunspot on the Sun's surface. Sunspots appear darker because they are cooler than their surroundings. They are caused by strong magnetic activity that inhibits convection and reduces temperature.
The darkest part, where the magnetic field is approximately vertical to the sun's surface is called the Umbra.
a sunspot
sunspot
A sunspot can appear dark because it is cooler than the surrounding areas of the Sun's surface, with temperatures around 3,000 to 4,500 degrees Celsius compared to about 5,500 degrees Celsius for the Sun's photosphere. Although sunspots emit less light due to their lower temperature, they can still be bright in absolute terms when compared to other celestial objects. The contrast with the brighter, hotter surrounding regions makes them appear dark to our eyes.
An example of a sunspot is the group of dark spots visible on the Sun's surface, caused by intense magnetic activity. Sunspots appear darker than their surrounding regions due to their lower surface temperatures. They usually occur in regions of strong magnetic fields on the solar surface.
A cool, dark area on the sun's surface is called a sunspot. Sunspots are areas of reduced temperature that appear dark against the brighter background of the surrounding solar surface because they are regions of concentrated magnetic field flux inhibiting convective flow.
A "sunspot."
The cooler dark spots on the sun are called sunspots.
The lighter-colored region around the dark center of a sunspot is called the penumbra. It consists of less dense magnetic field lines compared to the umbra, which is the darkest part of the sunspot.