Jacobus Cornelius Kapteyn
From Wikimedia Commons, the free media repository
English: Jacobus Cornelius Kapteyn (1851–1922) was a Dutch astronomer.
Nederlands: Jacobus Cornelius Kapteyn (1851–1922) was een Nederlans astronoom.
 Jacobus Cornelius Kapteyn (1851 – 1922) |
 Picture of Jacobus Cornelius Kapteyn made at the Mount Wilson Observatory in 1908. |
 Painting of J.C. Kapteyn at his desk |
 Jacobus Cornelis Kapteyn (1851-1922) painted by Jan Pieter Veth (1864-1925) |
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