Jacobus Cornelius Kapteyn , 1851-1922, Dutch astronomer. He was an authority on the Milky Way, of which he made notable statistical studies; he constructed a model of the galaxy known as the "Kapteyn universe." He computed the positions of the stars of the Southern Hemisphere photographed by Sir David Gill and in 1904 announced the discovery of two streams of stars moving in opposite directions in the plane of the Milky Way.
Author not available, KAPTEYN, JACOBUS CORNELIUS.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Delusions of centrality
Natural History; 12/1/2002; Tyson, Neil deGrasse; 2988 words;
... accuracy of Hipparchus's maps, but he also benefited from ... later the Dutch astronomer Jacobus Cornelius Kapteyn-using the best available ... direction, 180 degrees away. Kapteyn devoted some twenty years ... the time, especially not Kapteyn, that most sight lines to ...
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Dust to dust
Natural History; 5/1/2003; Tyson, Neil deGrasse; 2059 words;
... dimmer than their distance alone would indicate. Following up on Comstock's observations, the Dutch astronomer Jacobus Cornelius Kapteyn named the culprit in 1909, when he presented evidence that clouds of "meteoric dust" in the space between the ...
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