Sunspot
Videos
Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit conv
The Swedish 1-m Solar Telescope at Roque de los Muchachos Observatory on La Palma in the Canary Islands
NASA's SDO Observes Largest Sunspot of the Solar Cycle
Sunspots 1302 Sep 2011 by NASA
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Photosphere
Videos
The photosphere is a star's outer shell from which light is radiated. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately 2⁄3, or equivale
Sunspot
…close-up in the visible spectrum and a large group of sunspots stretching about 320,000 km (200,000 mi) across. Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit…
Sun's surface in false color
Solar atmosphere: temperature and density. See here for meanings of extra lines in the graph.