德国业余天文学家塞缪尔海因里希•施韦尔(Samuel Hei

德国业余天文学家塞缪尔海因里希•施韦尔(Samuel Heinrich Schwabe)开始了一个系统地观察他在塞梅的家中的阳光。 他在17岁以上的太阳黑子记录了仔细记录,1843年指出了一个11年的频率周期。
原文:1826 Samuel Heinrich Schwabe, German amateur astronomer, began a systematic program of observing the Sun from his home in Dessau. He kept careful records of sunspots over 17 years and in 1843 noted an 11-year cycle in their frequency.