Sunspot AR12738 in Hydrogen Alpha
Taken by Stuart Green on April 12, 2019 @
Preston, Lancashire, UK
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Active region 12738 is spectacular in hydrogen alpha ultra narrow band light at 656.28nm, even with backyard telescopes. It's so refreshing to see some solar activity at this time of solar minimum.
Photographer's website:
http://https://www.flickr.com/photos/solarcarbon60/
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