In 1887 she took up a post at the Paris Observatory.

The Paris Observatory was to do a major portion of the sky as its contribution.

Between 1933 and 1971 he was allowed to observe from the Paris Observatory.

He retired as director of the Paris Observatory in 1926.

Completion of Paris Observatory, the world's first such national institution.

He began working at the Paris Observatory in 1863.

He worked as an assistant at the Paris Observatory beginning in 1872.

From 1925, he worked in the optics laboratory of the Paris Observatory.

From 1799, he was the director of the Paris Observatory.

He began his professional life as an astronomer at the Paris Observatory in 1961.