Template:Selected anniversaries/October 9: Difference between revisions
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||1604: Supernova 1604, the most recent supernova to be observed in the Milky Way. | ||1604: Supernova 1604, the most recent supernova to be observed in the Milky Way. | ||
||1676: Leeuwenhoek writes to Oldenburg to describe the "little animals" he sees in his microscope. "The 31th of May, I perceived in the same water more of those Animals, as also some that were somewhat bigger. And I imagine, that [ten hundred thousand] of these little Creatures do not equal an ordinary grain of Sand in bigness: And comparing them with a Cheese-mite (which may be seen to move with the naked eye) I make the proportion of one of these small Water-creatures to a Cheese-mite, to be like that of a Bee to a Horse: For, the circumference of one of these little Animals in water, is not so big as the thickness of a hair in a Cheese-mite." | |||
||1704: Johann Andreas Segner, German mathematician, physicist, and physician. Pic. | ||1704: Johann Andreas Segner, German mathematician, physicist, and physician. Pic. | ||
File:Leonhard Euler.jpg|link=Leonhard Euler (nonfiction)|1775: A paper by [[Leonhard Euler (nonfiction)|Leonhard Euler]], ''Speculationes circa quasdam insignes proprietates numerorum'', was presented at the Saint-Petersburg Academy. In this paper, he revisits the idea that has come to be called Euler's Phi function. He first introduced the idea to the Academy on Oct 15,1759 but did not include a symbol or name. Euler defined the function as "the multitude of numbers less than D, and which have no common divisor with it." (This is slightly different than the current definition which used Greatest Common Divisor is one). | |||
||1801: Auguste Arthur de la Rive born ... physicist. | ||1801: Auguste Arthur de la Rive born ... physicist. | ||
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||1988: Felix Wankel dies ... engineer, invented the Wankel engine. | ||1988: Felix Wankel dies ... engineer, invented the Wankel engine. | ||
||1992: A great meteor, seen from Kentucky to New York, was observed at 7:50 pm EDT. It landed as a stone (chondrite, Olivine-Bronzite, H6, brecciated) meteorite. Its 12.37 kg mass crashed onto the Chevrolet Malibu car of Mrs. Michelle Knapp of Wells Street in Peekskill, NY. The fireball was first seen over West Virginia and traveled about 700 km NE, before smashing into the parked car with a velocity of about 80 m/s. | |||
||1999: Milton "Bags" Jackson dies ... jazz vibraphonist, usually thought of as a bebop player, although he performed in several jazz idioms. He is especially remembered for his cool swinging solos as a member of the Modern Jazz Quartet and his penchant for collaborating with several hard bop and post-bop players. | ||1999: Milton "Bags" Jackson dies ... jazz vibraphonist, usually thought of as a bebop player, although he performed in several jazz idioms. He is especially remembered for his cool swinging solos as a member of the Modern Jazz Quartet and his penchant for collaborating with several hard bop and post-bop players. | ||
Revision as of 08:41, 9 October 2018
1581: Mathematician and linguist Claude Gaspard Bachet de Méziriac born. He will do work in number theory and find a method of constructing magic squares.
1582: Astronomer and mathematician Michael Maestlin uses Copernican system of the solar system to predict imminent outbreak of crimes against mathematical constants.
1775: A paper by Leonhard Euler, Speculationes circa quasdam insignes proprietates numerorum, was presented at the Saint-Petersburg Academy. In this paper, he revisits the idea that has come to be called Euler's Phi function. He first introduced the idea to the Academy on Oct 15,1759 but did not include a symbol or name. Euler defined the function as "the multitude of numbers less than D, and which have no common divisor with it." (This is slightly different than the current definition which used Greatest Common Divisor is one).
1859: Alfred Dreyfus born. He will be wrongly convicted of treason during the Dreyfus affair.
1903: "Fightin'" Bert Russell agrees to fight three rounds of bare-knuckled boxing at World Peace Conference.
1918: CIA officer and author E. Howard Hunt born. Along with G. Gordon Liddy, Hunt will plot the Watergate burglaries and other undercover operations for the Nixon administration.
1948: Mathematician Joseph Wedderburn dies. He made significant contributions to algebra, proving that a finite division algebra is a field, and proving part of the Artin–Wedderburn theorem on simple algebras.
2016: Purple Racer voted Picture of the Day by the citizens of New Minneapolis, Canada.
2017: Artificial intelligence based on the Golden ratio develops genuine gratitude for Michael Maestlin's approximation of the Golden ratio.
