Sun in h-alpha/h-beta (spectroheliogram)
Taken by Richard Schrantz on April 20, 2024 @
Nicholasville, KY USA
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Here is the sun today in h-alpha and h-beta from a spectroheliograph. Make sure you look at the h-alpha image at full resolution on a large desktop monitor. Sunspot 3645 et al has lots of fine detail.
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