Europe@feddit.orgEnglish · 5 months ago

These 17th-century drawings of the sun by Kepler add fire to solar cycle mystery

www.livescience.com

These 17th-century drawings of the sun by Kepler add fire to solar cycle mystery

www.livescience.com

CAVOK@lemmy.world to

Europe@feddit.orgEnglish · 5 months ago

Kepler's sun drawings are the oldest sunspot records with known dates.

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5 months ago
Maybe the author had forgotten about them?

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