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

https://www.livescience.com/space/the-sun/these-17th-century-drawings-of-the-sun-by-kepler-add-fire-to-solar-cycle-mystery

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

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Jayjader

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There's a sentence about halfway through the article that specifies what they mean by "half-forgotten":

He added the significance of Kepler's solar drawings was overlooked, over the eras: "It has only been discussed in the context of the history of science and had not been used for quantitative analyses for the solar cycles."

Imo it's not-so-crappy journalist speak (for once).

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