1643 in science

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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

• Evangelista Torricelli invents the mercury barometer.

Technology

• A microscope is developed by Antonie van Leeuwenhoek of Delft (b. 1632).

Births

• January 4 (NS) - Isaac Newton, English physicist (d. 1727)
• Jean de Fontaney, French Jesuit mathematician and astronomer (d. 1710)

Deaths

• April 9 - Benedetto Castelli, Italian mathematician (b. 1578)
• November 3
  • John Bainbridge, English astronomer (b. 1582)
  • Paul Guldin, Swiss mathematician and astronomer (b. 1577)
• Sophia Brahe, Danish astronomer (b. 1556)
• Walter Warner, English scientist (b. 1563)