Cornelis de Jager
Dutch astronomer, university professor, pioneer of space science, science communicator and opponent of pseudoscience (1921-2021) · Netherlands · On the map · Scientists · Died at 100
Cornelis "Kees" de Jager was a Dutch astronomer who specialized in predicting solar variation to assess the Sun's impact on future climate. He was the General Secretary of the IAU from 1967 to 1973 and former director of the observatory at Utrecht.
Cornelis de Jager is read about 16 times a day, in 17 languages.
A typical day, 30 days to 15 June 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
Something wrong?A life in dates
Media & music
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Awards
About this person
He was a fellow with the Committee for Skeptical Inquiry and played an important role in the European skeptical movement as the first chairman of both Stichting Skepsis and the European Council of Skeptical Organisations.
Where to find them
The same award as Cornelis
Maarten SchmidtBoth received Karl Schwarzschild Medal
Loren ActonBoth received George Ellery Hale Prize
Adriaan BlaauwBoth received Honorary Doctorate of Paris Observatory, PSL University
Horace W. BabcockBoth received George Ellery Hale PrizeErika Böhm-VitenseBoth received Karl Schwarzschild Medal
Veronique DehantBoth received Honorary Doctorate of Paris Observatory, PSL University