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Heinrich Schwabe, German astronomer (died 1875)

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Heinrich Schwabe
German astronomer (1789–1875)
Samuel Heinrich Schwabe was a German amateur astronomer remembered for his work on sunspots. He observed sunspots and made drawings of them from 1825 to 1867 and suggested in 1838 that there may be a ten-year cycle of sunspot activity. He also took an interest in botany and was…Source: Wikipedia (CC BY-SA)