Quiescent Prominence

Quiescent Prominence

. Dense, cool gas, seen in the red light of hydrogen alpha at the rim of the Sun, outlines magnetic arches that are silhouetted against the dark background. The prominence material, appearing as a flaming curtain up to 65 million meters above the photosphere, is probably injected into the base of the magnetic loops in the chromosphere. (Courtesy of the Big Bear Solar Observatory.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University