Some images I took earlier this year while testing out a new solar telescope.
To make the prominences visible like this I had to completely over-expose the surface of the sun. Doing this gives great prominence detail but the sun is just a white blob, so to make the prominences easier to see in the image I turned all pixels which were pure white into pure black instead.
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This second image is a dual exposure - one exposure taken to show the prominences around the edge, and another to show the surface of the sun. When blended you get the full disc as well as the detail around the edge.
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