Template:Selected anniversaries/July 27: Difference between revisions

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File:George Biddell Airy 1891.jpg|link=George Biddell Airy (nonfiction)|1801: Mathematician and astronomer [[George Biddell Airy (nonfiction)|George Biddell Airy]] born. His achievements will include work on planetary orbits, measuring the mean density of the Earth, and, in his role as Astronomer Royal, establishing Greenwich as the location of the prime meridian.
File:George Biddell Airy 1891.jpg|link=George Biddell Airy (nonfiction)|1801: Mathematician and astronomer [[George Biddell Airy (nonfiction)|George Biddell Airy]] born. His achievements will include work on planetary orbits, measuring the mean density of the Earth, and, in his role as Astronomer Royal, establishing Greenwich as the location of the prime meridian.
File:Peter Gustav Lejeune Dirichlet.jpg|link=Peter Gustav Lejeune Dirichlet (nonfiction)|1837: [[Peter Gustav Lejeune Dirichlet (nonfiction)|Peter Dirichlet]] presented his first analytic number theory paper at a meeting of the Berlin Academy of Sciences. He proved the fundamental theorem that bears his name: Every arithmetical sequence an + b, n = 0, 1, 2, ... of integers, where a and b are relatively prime, contains infinitely many primes.


File:John Dalton by Charles Turner.jpg|link=John Dalton (nonfiction)|1844: Chemist, meteorologist, and physicist [[John Dalton (nonfiction)|John Dalton]] dies. He proposed the modern atomic theory, and did research in color blindness.
File:John Dalton by Charles Turner.jpg|link=John Dalton (nonfiction)|1844: Chemist, meteorologist, and physicist [[John Dalton (nonfiction)|John Dalton]] dies. He proposed the modern atomic theory, and did research in color blindness.

Revision as of 08:09, 27 July 2018