1690 in science
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The year 1690 in science and technology included many events, some of which are listed here.
See also: 1689 in science, other events of 1690, 1691 in science and the list of years in science.
Astronomy
- Giovanni Cassini observes differential rotation within Jupiter's atmosphere.
- Earliest recorded sighting of the planet Uranus, by John Flamsteed, who mistakenly catalogues it as the star 34 Tauri
Births
- March 18 - Christian Goldbach, Prussian mathematician (died 1764)
- Jan Frederik Gronovius, Dutch botanist (died 1762)