Jacobus Kapteyn
✓ Source-basedstableDutch astronomer, best known for his extensive studies of the Milky Way and as the first discoverer of evidence for galactic rotation (1851-1922)
Jacobus Cornelius Kapteyn was a Dutch astronomer. He carried out extensive studies of the Milky Way. He found that the apparent movement of stars was not randomly distributed but had two preferential directions: the two star streams. This discovery was later reinterpreted as evidence for galactic rotation.
Text from Wikipedia, CC BY-SA 4.0
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Photos 2
Awards 7
Connected to Jacobus 6
Arthur AuwersAlso won Honorary Fellow of the Royal Society of Edinburgh
Margaret GellerAlso won James Craig Watson Medal
Walter Sydney AdamsAlso won Bruce Medal
Charles T. KowalAlso won James Craig Watson Medal
Ernest William BrownAlso won Bruce Medal
Alexander Emanuel AgassizAlso won Honorary Fellow of the Royal Society of EdinburghAbout this person
Jacobus Cornelius Kapteyn was a Dutch astronomer. He carried out extensive studies of the Milky Way. He found that the apparent movement of stars was not randomly distributed but had two preferential directions: the two star streams. This discovery was later reinterpreted as evidence for galactic rotation. Kapteyn also suggested that these stellar velocities could be used to find the amount of non-luminous matter in the galaxy, which his student, Jan Oort, measured in 1932, referring to it as "invisible matter".
Text from Wikipedia, CC BY-SA 4.0
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