The year 1643 in science and technology

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.

Meteorology

• 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