Sunspots are areas where the intensity of the magnetic field on the surface of the sun. The dark spots are darker than the others, because it has a lower temperature than the surrounding area is a dark spot has a temperature of about 3700 K, while the area around the pitch with an average temperature of about 5700 K, the size of the dark. ranging from 3,600 km to 50,000 km usual spots, each spot will last less than a week. But there are some points that last several months.
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