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Closeup of Large Sunspot Group Seen Through a Solar Filter | by J.D. Knight
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Closeup of Large Sunspot Group Seen Through a Solar Filter

Closeup of sunspots as seen through my 10-inch Meade Schmidt Cassegrain telescope in Orlando, Florida on 10/21/89. This image was captured on Kodak Ektachrome 200 color slide film with a Thousand Oaks full-aperture glass solar filter. This group of sunspots were responsible for a large solar flare recorded the day before.

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Taken on February 10, 2010