Dr. Audouin Dollfus was a French astrophysicist who for many years was Head of the Laboratory for Physics of the Solar System at Meudon Observatory in Paris. He is a leading planetary observer. In the 1950s, Dollfus made several balloon flights for high-altitude observations of the Sun and planets, including the first stratospheric ascension in France. He was one of the first to notice brightness ripples in the rings of Saturn. In 1966, when the rings of Saturn were edge-on, he discovered the 10th satellite of Saturn, Janus, orbiting just outside the bright ring system. Janus was the first satellite of Saturn to be discovered in the 20th century.
Deceased: 2010 October 1.