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Features

NASA/STEREO
Images from NASA’s Solar Terrestrial Relations Observatory that show waves traveling through the corona. The sun itself is blocked out to make the corona easier to view. Credit: NASA/STEREO.

By Alex H. Kasprak

National Aeronautics and Space Administration

Like Earth, the sun has an atmosphere with layers in it. The outermost layer is called the corona and it’s awild mess of activity. Scientists have long known about the corona. It is home to some spectacular shows—giant eruptions called Coronal Mass Ejections, loops, prominences and massive magnetic storms.