Date of Birth: 01/19/1851
Jak & # 243; beads Corn & # 233; LIMS Capte & # 233; dH (niderl Jacobus Cornelius Kapteyn; January 19, 1851, of Barneveld, The Netherlands - June 18, 1922.) - Dutch astronomer who became famous for conducted extensive studies of the Milky Way. He also became the first scientist who has found evidence of the rotation of galaxies.
Kapteyn entered the University of Utrecht in 1868. In 1875 he defended his thesis, and then for three years he worked at Leiden Observatory, after which he became the first Professor of Astronomy and Theoretical Mechanics at the University of Groningen, where he worked until his retirement in 1921.
In the interval from 1896 to 1900, without being able to observe yourself, Kapteyn volunteered to explore the photographic plates obtained by David Gill, who made a photographic study of the stars of the southern hemisphere in the Cape Town Observatory. The result of their collaboration was the publication of the catalog