The Wilson Effect On AR4492 At The Limb

The Wilson effect on AR4492 at the limb
Taken by Thierry Legault on July 20, 2026 @ Paris, France

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Date Taken: 2026:07:20 15:05:15

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The new sunspot AR4492 shows the Wilson effect: sunspots form depressions

Photographer's website:

https://www.astrophoto.fr

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