Sun in h-alpha
Taken by Richard Schrantz on September 2, 2023 @
Nicholasville, KY USA
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Details:
The sun had a few nice sunspots, including one right on the edge (3413). These always give a cool perspective, because you are looking at the side of it instead of looking down on it. Many edge sunspots look like craters with a raised rim of activity on both sides! That's the Wilson Effect, where the sunspot umbra is actually a depression in the sun's photosphere. 127mm f/9.4 refractor, Quark-C/Lunt tilt-tune double-stack filter, ASI174mm camera.
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