Minnaert, Marcel

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Minnaert, Marcel Gender: M
Marcel Gilles Jozef Minnaert
born on 12 February 1893 at 12:00 (= 12:00 noon )
Place Bruges, Belgium, 51n13, 3e14
Timezone GMT h0e (is standard time)
Data source
BC/BR in hand
Rodden Rating AA
Collector: Scholfield
Astrology data s_su.18.gif s_aqucol.18.gif 24°03' s_mo.18.gif s_capcol.18.gif 04°08 Asc.s_gemcol.18.gif 28°46'

Marcel Minnaert (1967)


Dutch astronomer of Belgian origin who became a pioneer of solar research. He specialized in spectroscopy and the study of stellar atmospheres.

Minnaert was also interested in bubbles and musical nature of the sounds made by running water. In 1933 he published a solution for the acoustic resonance frequency of a single bubble in water, the so-called Minnaert resonance.

In 1937, he was appointed director of the stellar observatory Sonnenborgh in Utrecht and full professor in astronomy at the university. In 1940, he published his famous Utrecht Atlas of the solar spectrum. In 1941, he invented the Minnaert function, which is used in optical measurements of celestial bodies.

During the German occupation of the Netherlands in World War II, he was imprisoned by the Germans because of his left-wing, anti-fascist sympathies. During his incarceration, he taught physics and astronomy to his fellow prisoners. After the War, he was one of the founders of the Mathematisch Centrum in Amsterdam.

He died in Utrecht on 26 October 1970.

Link to Wikipedia biography


Source Notes

Sy Scholfield submitted birth certificate no. 194 from the online Bruges municipal archives: "om twaalf ure 's middags" (at twelve midday).


  • Vocation : Education : Teacher
  • Vocation : Military : POW/ MIA (POW)
  • Vocation : Science : Astronomy
  • Vocation : Writers : Textbook/ Non-fiction
  • Notable : Famous : First in Field (Discoverer of the Minnaert resonance)
  • Notable : Famous : First in Field (Discoverer of the Minnaert function)