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This beautiful medal has been minted in 1980 to commemorate Daniel CHALONGE, a French astronomer and astrophysicist, 1895 - 1977.
This medal has been designed by the prominent French medalist, Magdaleine-Pierre QUEROLLE.
Daniel
Chalonge (January 21, 1895 –
November 28, 1977) was a French
astronomer and astrophysicist. He
was born in Grenoble and
studied in Paris under Charles
Fabry. Chalonge worked as an astronomer at the Observatoire de Paris, the Observatoire d'Haute
Provence and the Swiss Jungfraujoch Scientific Station. One of the founders of
the Institut d'astrophysique de Paris, his studies
included the stellar spectrum
of hydrogen, stellar photometry and classification, and measurement of the
ozone layer.
Chalonge developed a microphotometer, which was subsequently named after him.
Between 1936 and 1982 he authored (or co-authored) over 90 scientific papers.
Chalonge died in Paris.
diameter
- 68 mm (2⅝“)
weight
– 157.10 gr, (5.54 oz)
metal
– bronze, authentic patina