Astronomer Events in History
The Galaxy does not therefore rotate as a uniform whole but exhibits what is known as 'differential rotation'. In , 76 years later, he went up in a plane and was able to see the famous comet once more. As Oort later noted, "Kapteyn and his co-workers had not realized that the absorption in the galactic plane was as bad as it turned out to be. He went on to study high-velocity clouds. Retrieved 30 May De Sitter was interested, but his main line of research was celestial mechanics; at that time the expanding universe had moved away from his direct interest. Archived from the original on 4 September
Jan Oort - Wikipedia
Oort attended primary school in Oegstgeest and secondary school in Leiden, and in went to Groningen University to study physics. Oort went on to study comets, which he formulated a number of revolutionary hypotheses. Retrieved from " https: Before the war was over, he initiated, in collaboration with a student at Utrecht , Hendrik van de Hulst , a project that eventually succeeded, in , in detecting the centimeter radio emission from interstellar hydrogen spectral line at radio frequencies.
Description: Oort was present for the lecture and was greatly impressed. Our radio astronomy was really started with the aid of one of these instruments… it was in Kootwyk that the first map of the Galaxy was made. Before the war was over, he initiated, in collaboration with a student at Utrecht , Hendrik van de Hulst , a project that eventually succeeded, in , in detecting the centimeter radio emission from interstellar hydrogen spectral line at radio frequencies. He also continued researching the Milky Way and other galaxies and their distribution until shortly before his death at In the early s he received job offers from Harvard and Columbia University , but chose to stay at Leiden, although he did spend half of at the Perkins Observatory , in Delaware , Ohio.