Anders Johan Lexell Anders Johan Lexell Anders Johan Lexell (24 December 1740 – ) was a Finnish-Swedish astronomer, mathematician, and physicist who spent most of his life in Imperial Russia, where he was known as Andrei Ivanovich Leksel (Андрей Иванович Лексель). Lexell made important discoveries in polygonometry and celestial mechanics; the latter led to a comet named in his honour. La Grande Encyclopédie states that he was the prominent mathematician of his time who contributed to spherical trigonometry with new and interesting solutions, which he took as a basis for his research of comet and planet motion. His name was given to a
Charles Green (astronomer) London; the records of the Royal Society mention making a provision of £50 per annum for his wife for the duration of the expedition. Green's sister Mary married the astronomer William Wales, who was part of a Royal Society expedition to Hudson Bay to observe the 1769 transit of Venus and who replaced Green for Cook's next voyage. Charles Green (astronomer) Charles Green (baptised 26 December 1734 – 29 January 1771) was a British astronomer, noted for his assignment by the Royal Society in 1768 to the expedition sent to the Pacific Ocean in order to observe the transit of