This image of the Sun was taken at the Phoebe Waterman Haas Public Observatory on July 21, 2013 at 11:07 am.
The bright loops around the edge of the image are called prominences; they are magnetic loops that extend into the atmosphere of the Sun. The dark lines seen throughout the disk are also magnetic loops; when seen on the disk they are called filaments. Two sunspot groups on the disk are each surrounded by brighter areas called plages. These bright cloud-like features tend to form above sunspots.
The same features can be seen on the image of the Sun from the previous day.
Telescope: Lunt 100mm hydrogen-alphaCamera: Lumenera SKYnyx 2-2M
Image Number: WEB13131-2013
Credit: Image by Geneviève de Messières and Kaitlin Evans, Phoebe Waterman Haas Public Observatory
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