Schwabe
Encyclopedia Britannica
SCHWABE, Samuel Heinrich (1789-1875), German amateur astronomer, was born on 25th October 1789 at Dessau, where he died on 11th April 1875; he observed the sun-spots regularly from 1826 and pointed out (in 1843) the periodicity in the number of these objects.
9th ed. Encyclopædia Britannica, vol. 21, p. 460
[44 words — estimated reading time: 1 minute]
[44 words — estimated reading time: 1 minute]