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Charles-Eugène Delaunay

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Charles-Eugène Delaunay (April 9, 1816 - August 5, 1872) was a French astronomer and mathematician.

Born in Lusigny-sur-Barse, France, Delaunay studied under Jean Baptiste Biot at the Sorbonne. He worked on the mechanics of the Moon as a special case of the three-body problem. His infinite series expression for finding the position of the Moon converged too slowly to be of practical use but was a catalyst in the development of functional analysis.

Delaunay became director of the Paris Observatory in 1870 but was drowned in a boating accident near Cherbourg, France two years later.

Publications

  • Cours élémentaire de mécanique (1850)
  • Traité de mécanique rationnelle (1856)
  • La Théorie du mouvement de la lune, 2 vols (1860-7)
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