Jacobus Kapteyn

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.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Who was born first?

• Jacobus Kapteyn and Charles Chamberland were born the same year
• Jacobus Kapteyn and Edward Walter Maunder were born the same year
• Jacobus Kapteyn and Guillaume Bigourdan were born the same year
• Jacobus Kapteyn and George FitzGerald were born the same year
• Jacobus Kapteyn and Jacques-Arsène d'Arsonval were born the same year

Timeline

1. Charles ChamberlandMarch 12, 1851 – May 2, 1908
2. Edward Walter MaunderApril 12, 1851 – March 21, 1928
3. George FitzGeraldAugust 3, 1851 – February 21, 1901
4. Guillaume BigourdanApril 6, 1851 – February 28, 1932
5. Jacobus Kapteyn (this page)January 19, 1851 – June 18, 1922
6. Jacques-Arsène d'ArsonvalJune 8, 1851 – December 31, 1940

Related

• Isaac NewtonDecember 25, 1642 – March 20, 1727
• Johann Wolfgang von GoetheAugust 28, 1749 – March 22, 1832
• Immanuel KantApril 22, 1724 – February 12, 1804
• René DescartesMarch 31, 1596 – February 11, 1650
• Marie CurieNovember 7, 1867 – July 4, 1934
• Nicolaus CopernicusFebruary 19, 1473 – May 24, 1543
• Louis PasteurDecember 27, 1822 – September 28, 1895
• Gottfried Wilhelm LeibnizJune 21, 1646 – November 14, 1716