Sunspots

Sunspots are regions of intense magnetic activity on the Sun's surface. The number of sunspots rises and falls over the Sun's approximately 11-year activity cycle and is one of the main ways astronomers track and predict solar activity.
Sunspots are regions of intense magnetic activity on the Sun's surface. The number of sunspots rises and falls over the Sun's approximately 11-year activity cycle and is one of the main ways astronomers track and predict solar activity.
NASA/SDO
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