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.

25 October 1789

Born on the same birth date (25 October 1789): Carlos María de Alvear

Born on the same birth day (25 October): Alexander Gretchaninov • Arnfinn Nesset • Dave Weill • Johan de Kock • Marcellin Berthelot • Midori (violinist) • Shaun Wright-Phillips

Born in the same month (October 1789): Carlos María de Alvear • John Ruggles • Theophilos Kairis • William Burton (governor) • William Christopher Zeise • William John Swainson