Heinrich Schwabe
Videos
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
Samuel Heinrich Schwabe
Grave stone in Dessau
Rudolf Wolf
Videos
Johann Rudolf Wolf was a Swiss astronomer and mathematician best known for his research on sunspots.
Heinrich Schwabe
…a probable ten-year period (i.e. that at every tenth year the number of spots reached a maximum). This paper at first attracted little attention, but Rudolf Wolf who was at that time the director of Bern observatory, was impressed so he began regular observations of sunspots. Schwabe's observations were afterwards…
Rudolf Wolf