Jean Baptiste Joseph Delambre, French astronomer, c 1810s.
© Science Museum / Science & Society Picture Library
Engraving made in 1833 by Benjamin Holl from the original by Boilly. Delambre (1749-1822) developed statistical methods for calculating tables of lunar motion. These were used throughout the nineteenth century. From his research he published 'Tables du Soleil, de Jupiter, de Saturne, d'Uranus et des satellites de Jupiter' (1792). He worked at the Bureau des Longitudes from 1795, and measured the arc of the meridian extending from Dunkirk to Barcelona. His account was published in 'Base du systEme mEtrique'. He also wrote histories of astronomy through the ages, and has a large lunar crater named after him. Dimensions: 127mm x 102mm.