About Félix Tisserand
François Félix Tisserand (French pronunciation: [fʁɑ̃swa feliks tisʁɑ̃]; 13 January 1845 – 20 October 1896) was a French astronomer. == Life == Tisserand was born at Nuits-Saint-Georges, Côte-d'Or. In 1863 he entered the École Normale Supérieure, and on leaving he went for a month as professor at the lycée at Metz. Urbain Le Verrier offered him a post in the Paris Observatory, which he entered as astronome adjoint in September 1866. In 1868 he took his doctor's degree with a thesis on Delaunay's Method, which he showed to be of much wider scope than had been contemplated by its inventor. Shortly afterwards he went out to Kra Isthmus with Édouard Stephan and Georges Rayet to observe the 1868 solar eclipse. The French astronomers were accompanied by Mongkut, the King of Siam who had calculated the location and the date of the eclipse by himself two years before and prepared a comfortable watching place for the scientists. In 1873 he was appointed director of the observatory at Toulouse, where he published his Recueil d'exercices sur le calcul infinitesimal, and in 1874 became corresponding member of the Académie des Sciences. He took part in the French expeditions of 1874, accompanied by Jules Janssen, to Japan, and in 1882, accompanied by Guillaume Bigourdan, to Martinique to observe the transits of Venus. In 1878 he was elected a member of the Académie des Sciences in succession to Le Verrier, and became a member of the Bureau des Longitudes.
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