"1922-06-18Z"^^ . "1922Z"^^ . "1851-01-19Z"^^ . . "Jacobus Cornelius Kapteyn"@en . . . . "Dutchastronomer, best known for his extensive studies of theMilky Wayand as the first discoverer of evidence forgalactic rotation" . "Kapteyn, Jacobus Cornelius"@en . . . . . "Jacobus Cornelius Kapteyn, (January 19, 1851, Barneveld, Gelderland \u2013 June 18, 1922) was a Dutch astronomer. He carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation."@en . "1851Z"^^ . .