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Harlow Shapley and the Size of the Milky Way

Harlow Shapley and the Size of the Milky Way

Tabea Tietz
On November 2, 1885, American astronomer Harlow Shapley was born. Shapley is best know for having correctly estimated the size of the Milky Way Galaxy and the sun’s position within it. Harlow Shapley – Early Years Harlow Shapley was born in Nashville, Missouri and dropped out of school after fifth grade. However, later on he managed to return to school and complete a six-year high school program in only two years. At…
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astronomy
Jan Hendrik Oort and the Secrets of the Oort Cloud

Jan Hendrik Oort and the Secrets of the Oort Cloud

Tabea Tietz
On April 28, 1900, Dutch physicist and astronomer Jan Hendrik Oort was born. One of the greatest astronomers of the 20th century, Oort made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy. Oort determined that the Milky Way rotates and overturned the idea that the sun is at its center; he discovered mysterious invisible ‘dark matter‘ in 1932, as well…
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astronomy
Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

Harald Sack
On June 18, 1922, Dutch astronomer Jacobus Cornelius Kapteyn passed away. Kapteyn carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation. He used photography and statistical methods in determining the motions and spatial distribution of stars, the first major step after the works of William and John Herschel.[6,7] Jacobus C. Kapteyn – Early Year Jacobus Cornelius Kapteyn was born on 19 January 1851 in…
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