Jacobus Cornelius Kapteyn, (January 19, 1851, Barneveld, Gelderland - June 18, 1922) was a Dutch astronomer, best known for his extensive studies of the Milky Way and as the first discoverer of evidence for galactic rotation.Read more
Jacobus Cornelius Kapteyn, (January 19, 1851, Barneveld, Gelderland - June 18, 1922) was a Dutch astronomer, best known for his extensive studies of the Milky Way and as the first discoverer of evidence for galactic rotation.