Jean Chazy

Jean François Chazy (15 August 1882, Villefranche-sur-Saône – 9 March 1955, Paris) was a French mathematician and astronomer.

Chazy was the son of a small provincial manufacturer and studied mathematics at the École Normale Supérieure with completion of the agrégation in 1905.

In World War I he served in the artillery and became famous for accurately predicting the location of the German siege gun which bombarded Paris.

The problem of explaining Mercury's orbit was solved by Albert Einstein's general relativity theory.

In 1922 Chazy was awarded the Valz Prize from the French Academy of Sciences for his papers on the three-body problem.