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A 12th-century sunspot enigma

Is this feature observation or decoration?
RELATED TOPICS: SUNSPOTS
OMearaStephen
In January 2015, I received an email from Randall A. Rosenfeld, archivist for the Royal Astronomical Society of Canada, asking for help from Astronomy readers. The issue deals with a 12th-century rendering of what is now generally accepted as the earliest surviving depiction of sunspots. And you may be able to help verify a key aspect of this stylized drawing.

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