This image of the Sun's chromosphere includes a large Sunspot, as well as a thick filament.
Sunspots are caused by twisted magnetic fields that block convection on the Sun's surface.
These images were taken with a Lunt 60mm Hydrogen-Alpha telescope, and a Lumenera Skynyx 2-0 CCD Camera.
The images were processed using Registax and the GIMP. This is a mosaic of two images.
Image Number: WEB11608-2010
Credit: Image by Erin Braswell, Smithsonian Public Observatory Project
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