The image is the result of 14 stacked images taken on May 14th, 2013 from the solar-TAD telescope at Teide Observatory (Canary Islands). The inset image was obtained by students at MOA Youth Obervatory in Niepolomice (Poland) using a Maksutov-Cassegrain 180/1800 telescope with Coronado H-alpha 60 mm filter and Meade III Pro camera.
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