Jacobus cornelius kapteyn biography for kids
Biography for 2nd graders...
Jacobus Kapteyn
For the Dutch-Ghanaian minister, see Jacobus Capitein.
Jacobus Cornelius Kapteyn (19 January – 18 June ) was a Dutch astronomer.
Jacobus cornelius kapteyn biography for kids
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.[1]
Biography
Kapteyn was born in Barneveld to Gerrit J. and Elisabeth C.
(née Koomans) Kapteyn,[2][3] and went to the University of Utrecht to study mathematics and physics in In , after having finished his thesis, he worked for three years at the Leiden Observatory, before becoming the first Professor of Astronomy and Theoretical Mechanics at the University of Groningen, where he remained until his retirement in In he becam