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How 400-Year-Old Sunspot Sketches Are Solving Modern Solar Puzzles


Using updated statistical methods and historical data, scientists have reinterpreted Johannes Kepler’s sunspot drawings, shedding light on the solar cycles before the Maunder Minimum and the onset of the telescopic era of astronomy. Researchers have re-examined Johannes Kepler's half-forgotten su

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Photo of old sunspot sketches

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modern solar puzzles

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