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19 de may. de 2024 · Although sunspots were known as early as 1600, no one noticed that their number changed with time until the German amateur astronomer Samuel Heinrich Schwabe announced the 11-year cycle in 1843. Swiss astronomer Rudolf Wolf studied historical sunspot records and proposed the scheme still used for numbering solar cycles, with solar ...
- Harold Zirin
Hace 1 día · Heinrich Schwabe, a German amateur astronomer, discovered the Sun's activity cycle. Based on his observations of the Sun between 1826 and 1843, Schwabe concluded that the Sun rotates once every 27 ...
22 de may. de 2024 · The first record of the Great Red Spot is a drawing made in 1831 by German amateur astronomer Samuel Heinrich Schwabe of the “Hollow” in which the spot sits. The Great Red Spot itself has been continuously observed since 1878 when it was described by American astronomer Carr Walter Pritchett.
- The Editors of Encyclopaedia Britannica
24 de may. de 2024 · They found that migration velocity is about 2.2 degrees/year in the start of the cycle and decreases to 1.8 degrees/year in the maximum phase and is 0.7 degrees/year at the end of the average cycle. In this study we analyse the average drift of the sunspot groups for Solar Cycles (SC) 8 – 23 from three different databases and find the best ...
13 de may. de 2024 · Samuel Heinrich Schwabe (* 25. Oktober 1789 in Dessau; † 11. April 1875 ebenda) war ein deutscher Astronom und Botaniker. Sein offizielles botanisches Autorenkürzel lautet „ Schwabe “. Leben. Schwabe stammte aus dem Fürstentum Anhalt-Dessau. Er verließ 1806 die Schule, um Apotheker zu werden.
25 de may. de 2024 · Samuel Heinrich Schwabe in 1843 announced discovery of the solar cycle, in which the number of spots reaches a maximum about every 11 years on the average, as does solar magnetic activity, including explosive solar flares and coronal mass ejections.
10 de may. de 2024 · Although some speculation had occurred during the 18th century, the first decisive identification of an 11-year solar cycle comes from 1843, when the German amateur astronomer Heinrich Schwabe identified it through a careful analysis of the number of sunspots visible on the Sun's surface over time.
