On June 18, 1922, Dutch astronomer Jacobus Cornelius Kapteyn passed away. Kapteyn carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation. He used photography and statistical methods in determining the motions and spatial distribution of stars, the first major step after the works of William and John Herschel. Jacobus Cornelius Kapteyn was born on 19 January 1851 in Barneveld,in the Dutch province of Gelderland,…Read more
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