Traveled to Africa (1768), America (1768), and Italy (1775). Adjoint astronome of the Académie des sciences (1770). Directory of the Royal Observatory of Paris (1784). Imprisoned during the Revolution; senator and comte de l’empire under Napoleon. Finished the map of France begun by his father and helped divide France into départements.
Son of César-François and Charlotte (Drouin de Vandeuil) Cassini de Thury. Married Claude-Marie-Louise de La Myre- Mory (1773). Also called “Jacques-Dominique de Cassini.”