1821 in science
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| … 1818 • 1819 • 1820 – 1821 – 1822 • 1823 • 1824 … … 1790s • 1800s • 1810s – 1820s – 1830s • 1840s • 1850s … … 18th century – 19th century – 20th century … |
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The year 1821 in science and technology involved some significant events, listed below.
Contents |
[edit] Astronomy
- Comet Encke is the second comet to be discovered to have a periodic orbit, after Comet Halley.
- Alexis Bouvard detects irregularities in the orbit of Uranus.
[edit] Exploration
- William Edward Parry starts his second voyage to find the Northwest Passage.
[edit] Geology
- Ignatz Venetz proposes his ice age theory.
- Pierre Berthier discovers bauxite.
- Mary Anning finds the first ever plesiosaur fossil at Lyme Regis.
[edit] Mathematics
- Augustin Louis Cauchy gives the first complete presentation of calculus using limits.
[edit] Paleontology
- William Buckland finds the remains of a hyena's den in Yorkshire, containing the bones of lions, elephants and rhinoceros.
[edit] Physics
- Michael Faraday discovers electromagnetic rotation.
- Thomas Johann Seebeck discovers the thermoelectric effect.
- Augustin Fresnel shows that light is made up of a traverse wave motion.
[edit] Awards
[edit] Births
- May 16 - Pafnuty Chebyshev (d. 1894), mathematician.
- August 16 - Arthur Cayley (d. 1895), mathematician.
- August 31 - Hermann von Helmholtz (d. 1894), physicist.
- October 13 - Rudolf Virchow (d. 1902), biologist.
- November 18 - Franz Bronnow (d. 1891), astronomer.
[edit] Deaths
- April 20 - Franz Karl Achard (b. 1753), chemist.
