About Heinrich Schwabe
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 a founding member of a natural history society in Dessau. Schwabe obtained his first telescope through a lottery in 1825 and began his observations on sunspots from 30 October 1825. For 17 years, from 1826 to 1843, on every clear day, Schwabe would scan the Sun and record its spots trying to detect any new planet among them. His first note was a letter to Heinrich Schumacher which was published in Astronomical Nachrichten (no. 495).
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