Anders Planman also calculated the correct longitude for six locations on the way, among them Kajaani, Mikkeli and Hämeenlinna. He could do this partly because he used surveying tools for his astronomical observations; these were some of the most exact contemporary measuring tools. The minor planet 2639 Planman is named after Anders Planman. Anders Planman Anders Planman (1724 – 25 April 1803) was a Finnish astronomer, professor of physics and mathematician. He was one of the first people to make systematical astronomical observations in Finland. Planman came from a Swedish-speaking Finnish family and his father was a lieutenant. He studied at the
Anders Celsius name "Celsius" is a latinization of the estate's name (Latin "celsus" "mound"). As the son of an astronomy professor, Nils Celsius, and the grandson of the mathematician Magnus Celsius and the astronomer Anders Spole, Celsius chose a career in science. He was a talented mathematician from an early age. Anders Celsius studied at Uppsala University, where his father was a teacher, and in 1730 he, too, became a professor of astronomy there. In 1730, Celsius published the ("New Method for Determining the Distance from the Earth to the Sun"). His research also involved the study of auroral phenomena, which he