Strong magnetic fields near surface cause lower darker regions {sunspot}| of cooler 3900-K gas. Sunspots last 1 to 21 days and are 1 to 10 times wider than Earth. Sunspots start as small specks in horizontal belt, coagulate to make east-west pair, and then drift toward equator. Small sunspots {pore, Sun} can be near sunspots.
Physical Sciences>Astronomy>Star>Sun>Layers
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Date Modified: 2022.0224