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Kees de Jager
Astronomer

Kees de Jager

Famoose for

Studying the Sun and the most luminous stars.

Solar hydrogen spectrum · Hypergiants

Born
29 April 1921
Birthplace
Den Burg
Died
27 May 2021

More people

Marie CurieDiscovering polonium and radium.Albert EinsteinDeveloping the theory of relativity.Charles DarwinExplaining evolution through natural selection.

Kees de Jager

Kees de Jager was a Dutch astronomer whose career combined solar research, stellar physics and scientific leadership.

Early life

Texel and the East Indies

Born on Texel and spent his school years in the Dutch East Indies.

Utrecht

Completed his doctorate in 1952.

Career

  1. 1960–1986

    Professor

    Taught at Utrecht.

  2. 1967–1973

    IAU

    Served as general secretary.

  3. 1980

    Space instrument

    Led the HXIS investigation on Solar Maximum Mission.

Contributions

Solar hydrogen spectrum

His doctoral subject.

Hypergiants

Studied exceptionally luminous stars.

Beyond work

Scepticism

Helped establish European organisations promoting critical examination of claims.

Sources & photo creditBiography and career ↗Biographical data and references ↗

Original photograph. Cropped and displayed in monochrome.

Photo: Rob Rutten. CC BY-SA 3.0 · Original image. Cropped and displayed in monochrome.