Jean-Philippe Loys de Cheseaux (; 4 May 1718 – 30 November 1751) was a Swiss astronomer.
Biography
Loys de Cheseaux was born on 4 May 1718 in Lausanne, Vaud, to Paul-Etienne Loys de Cheseaux, a banneret, and Estienne-Judith de Crousaz. His brother was Charles-Louis Loys de Cheseaux. He acquired a reputation in Europe as an astronomer with the publication of his Traité de la Comète, Loys de Cheseaux discovered the comet C/1746 P1.