Pierre Henri Puiseux (July 20 1855 – September 28 1928) was a French astronomer.
Born in Paris, son of Victor Puiseux , he was educated at the Ecole Normale Supérieure before starting work as an astronomer at the Paris Observatory in 1885.
He worked on the aberration of light, asteroids, lunar dynamics and, in colloboration with Maurice Loewy, the ill-fated Carte du Ciel project. Puiseux created a photographic atlas of the Moon based on 6000 photographs taken by him and Loewy.
The Puiseux crater on the Moon is named after him.
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