1643 in science
The year 1643 in science and technology involved some significant events.
Exploration
- January 21 – Abel Tasman discovers the Tonga archipelago.
- December 25 – Captain William Mynors of the British East India Company discovers Christmas Island.
Meteorology
Births
- January 4 – Isaac Newton, English physicist
- Jean de Fontaney, French Jesuit mathematician and astronomer
- Pierre Dionis, French surgeon and anatomist
Deaths
- April 9 – Benedetto Castelli, Italian mathematician
- November 3
- * John Bainbridge, English astronomer
- * Paul Guldin, Swiss mathematician and astronomer
- Sophia Brahe, Danish astronomer
- Gasparo Berti, Italian mathematician, astronomer and physicist
- Walter Warner, English scientist