= Hale's law
{wiki=Hale's_law}
Hale's law, named after the American astronomer George Ellery Hale, refers to the observation that there is a relationship between the activity levels of sunspots and the solar cycle. Specifically, Hale formulated the law in terms of the magnetic field of sunspots, which states that sunspots exhibit a consistent pattern of polarity that reverses every solar cycle (approximately every 11 years). This law highlights the role of solar magnetic activity in influencing sunspot formation and behavior.
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