Alexandre-Gui, a French astronomer, was born at Paris in 1711, and was educated at a religious establishment at Senlis. The first part of his career was devoted to theology; but in 1749 the offer of a teachership in an academy at Rouen gave him a motive for applying himself to astronomy; and about 1753 his appointment to the office of librarian in the academy of St Geneviève afforded facilities for carrying out the study. Henceforth all the energies of Pingré were directed to astronomical pursuits. He became an indefatigable observer of transits and eclipses; and contributed many papers to the Memoirs of the Academy of Sciences, of which he was an associate. Especially in the numerical calculations which he made did his unwearied activity appear. He verified Lacaille's table of the eclipses of the first eighteen centuries of the present era, and carried back the computations to the date of 1000 years before Christ. He also calculated the orbits of all the known comets in a work which was published at Paris in 1783, under the title of Cométographie, and which was his only important publication. Pingré died at Paris in 1796. (See Delambre's biography of this astronomer in the Biographie Universelle.)