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

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[email protected]English • 3 months ago

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

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@Plopp
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8•3 months ago
Maybe the author had forgotten about them?

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