Jacobus Kapteyn
Dutch astronomer, best known for his extensive studies of the Milky Way and as the first discoverer of evidence for galactic rotation
Date of Birth: 19-Jan-1851
Place of Birth: Barneveld, Gelderland, Netherlands
Date of Death: 18-Jun-1922
Profession: astronomer, professor, physicist, university teacher
Nationality: Kingdom of the Netherlands
Zodiac Sign: Capricorn