= Solar cycle
{wiki=Solar_cycle}
A solar cycle refers to the periodic changes in solar activity, primarily the variation in the number of sunspots, solar flares, and solar radiation over an approximately 11-year period. This cycle is associated with the Sun’s magnetic field, which undergoes a complete reversal during each cycle. \#\#\# Key Features of the Solar Cycle: 1. **Sunspots**: These are temporary phenomena that appear as dark spots on the Sun's surface, caused by magnetic field fluctuations.
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