1805 in science
See also:
Other events of 1805
List of years in science
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1804 in science
1805 in science
1806 in science
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The year 1805 in science and technology included many events, some of which are listed here.
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Exploration
- April 7 - The Lewis and Clark expedition leaves Fort Mandan, bound for the Pacific Ocean
- August 9 - Zebulon Pike leaves St. Louis to explore the headwaters of the Mississippi River
- November 16 - The Lewis and Clark expedition reaches the Pacific Ocean at the mouth of the Columbia River
Awards
Births
- February 13 - Peter Gustav Lejeune Dirichlet, mathematician (died 1859)
- May 12 - William Rowan Hamilton, mathematician, physicist, and astronomer (died 1865)
- December 16 - Isidore Geoffroy Saint-Hilaire, zoologist (died 1861)
- December 20 - Thomas Graham, chemist (died 1869)
Deaths
- January 23 - Claude Chappe, inventor of the semaphore system (born 1763)
- December 23 - Pehr Osbeck, Swedish botanist and explorer, pupil of Linnaeus (born 1723)