1821 in science

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The year 1821 in science and technology included many events, some of which are listed here.

Contents 1 Astronomy 2 Exploration 3 Geology 4 Mathematics 5 Paleontology 6 Physics 7 Awards 8 Births 9 Deaths

[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 hyenas' 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

• Copley Medal: Edward Sabine; John Herschel

[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.