Solar prominence, illustration
Illustration of a solar prominence based on a Skylab 1 image from 1973. This prominence, is erupting from the chromosphere, which lies above the Sun's visible surface. Prominences are relatively cool dense clouds of plasma, or ionised gas, in the Sun's outer layer, the corona. At times, they can erupt, escaping the Sun's atmosphere, Photo by DETLEV VAN RAVENSWAAY/SCIENCE PHOTO LIBRARY
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