Pierre Méchain

Charles Messier and the Discovery of Nebulae

Charles Messier and the Discovery of Nebulae

On June 26, 1730, French astronomer Charles Messier was born. He is best known for his publication of an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 “Messier objects”. The purpose of the catalogue was to help astronomical observers, in particular comet hunters such as himself, distinguish between permanent and transient visually diffuse objects in the sky. “What caused me to undertake the catalog was…
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The Instruments of Jean-Charles de Borda

The Instruments of Jean-Charles de Borda

On May 4, 1733, French mathematician, physicist, political scientist, and sailor Jean-Charles de Borda was born. De Borda is noted for his studies of fluid mechanics and his development of instruments for navigation and geodesy, the study of the size and shape of the Earth. He is one of 72 scientists commemorated by plaques on the Eiffel tower. From Latin and Greek to Mathematics and Physics Jean-Charles de Borda grew up in Dax, France,…
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Pierre Mechain and the Meridian Survey Expedition

Pierre Mechain and the Meridian Survey Expedition

On August 16, 1744, French astronomer and surveyor Pierre François André Méchain was born. Together with Charles Messier, was a major contributor to the early study of deep sky objects and comets. He participated in the Meridian survey expedition in 1792 that produced measurements, which have served as the fundament of the metric system. Pierre Méchain was born in Laon, a medieval town in the Picardy region of northern France, as the son…
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