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Audouin Dollfus
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Audouin Dollfus

French astronomer
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Also known as: Audouin-Charles Dollfus
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Quick Facts
In full:
Audouin-Charles Dollfus
Born:
November 12, 1924, Paris, France
Died:
October 1, 2010, Versailles (aged 85)
Also Known As:
Audouin-Charles Dollfus
Subjects Of Study:
Solar System
Janus
See all related content

Audouin Dollfus (born November 12, 1924, Paris, France—died October 1, 2010, Versailles) was a French astronomer, successor to Bernard Lyot as the principal French authority on the solar system.

Dollfus made several balloon flights for high-altitude observations, including the first stratospheric ascension in France. On the basis of comparative light-polarizing qualities, he concluded that the surface material of Mars consists of pulverized limonite (an iron oxide, Fe2O3) and prepared a map of Venus showing what he believed to be permanent features. On December 15, 1966, he discovered Saturn’s 10th known satellite, Janus.

This article was most recently revised and updated by Encyclopaedia Britannica.