Last week on a very windy day I decided to get some cloud photos as there were so many intersting formations. In this photo only, amongst my other cloud photos, appears a dark, round object high up in the sky. What do you think?

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Enlarged
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Enlarged Further
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Overall darkening of tone
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Local Equalization
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Further up to the left was another less distinct form...

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Local Equalization
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Close-up Local Equalization
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