NASA takes image of 'smiling' sun – but it's no laughing matter

NASA takes image of 'smiling' sun – but it's no laughing matter
Dark patches, called coronal holes, are areas through which fast solar wind gushes out into space
Despite its seemingly "sunny" appearance, an image of the grinning sun isn't as cheery as it looks.

NASA's Solar Dynamics Observatory previously caught an image of the sun in ultraviolet light with three dark spots on its surface on Oct. 26, giving the illusion the sun was smiling. The smiling sun followed a partial solar eclipse Tuesday, though the two events were unrelated.

What many viewed as a giant pumpkin in the sky, though, consequently prompted a minor geomagnetic storm watch on Saturday.

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