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A Sunny Smile.

The Sun certainly got excited about Halloween! On October 26, 2022, NASA's Solar Dynamic Observatory (SDO) caught the fiery star sporting a cheerful "smile."

The three dark patches that form the "eyes" and "mouth" are coronal holes. The open structures allow solar winds to escape into space at speeds of up to 1.8 million mph (2.9 million kph). They appear dark because they are cooler and less dense than the rest of the Sun's surface.

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