See also: 1642 in science, other events of 1643, 1644 in science, list of years in science.
Exploration January 21 - Abel Tasman discovers the Tonga archipelago. Meterology Evangelista Torricelli invents the mercury barometer. Births January 4 - Isaac Newton (+1727), physicist and mathematician Deaths November 3 - John Bainbridge, astronomer November 3 - Paul Guldin, mathematician and astronomer
