Template:Selected anniversaries/April 11: Difference between revisions

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||1875: Samuel Heinrich Schwabe dies ... astronomer remembered for his work on sunspots. Pic.
||1875: Samuel Heinrich Schwabe dies ... astronomer remembered for his work on sunspots. Pic.
||1879: Bernhard Schmidt born ... engineer and optician ... He invented the Schmidt telescope which corrected for the optical errors of spherical aberration, coma, and astigmatism, making possible for the first time the construction of very large, wide-angled reflective cameras of short exposure time for astronomical research. Pic.


||1894: Mathematician Paul Finsler born. Finsler spaces will be named after him by Élie Cartan in 1934. The Hadwiger–Finsler inequality, a relation between the side lengths and area of a triangle in the Euclidean plane, is named after Finsler and his co-author Hugo Hadwiger, as is the Finsler–Hadwiger theorem on a square derived from two other squares that share a vertex. Pic: https://neurosophie.wordpress.com/2015/03/22/paul-finsler-und-eine-welt-ohne-widerspruche/  
||1894: Mathematician Paul Finsler born. Finsler spaces will be named after him by Élie Cartan in 1934. The Hadwiger–Finsler inequality, a relation between the side lengths and area of a triangle in the Euclidean plane, is named after Finsler and his co-author Hugo Hadwiger, as is the Finsler–Hadwiger theorem on a square derived from two other squares that share a vertex. Pic: https://neurosophie.wordpress.com/2015/03/22/paul-finsler-und-eine-welt-ohne-widerspruche/  


||1895: Julius Lothar Meyer dies ... chemist.
||1895: Julius Lothar Meyer dies ... chemist. Pic.


||1899: Percy Lavon Julian born ... chemist and academic.
||1899: Percy Lavon Julian born ... chemist and academic ... a pioneer in the chemical synthesis of medicinal drugs from plants.[1] He was the first to synthesize the natural product physostigmine, plus a pioneer in the industrial large-scale chemical synthesis of the human hormones progesterone and testosterone from plant sterols such as stigmasterol and sitosterol. His work laid the foundation for the steroid drug industry's production of cortisone, other corticosteroids, and birth control pills. Pic.


||1901: Donald Howard Menzel born ... one of the first theoretical astronomers and astrophysicists in the United States. He discovered the physical properties of the solar chromosphere, the chemistry of stars, the atmosphere of Mars, and the nature of gaseous nebulae. Pic.  
||1901: Donald Howard Menzel born ... one of the first theoretical astronomers and astrophysicists in the United States. He discovered the physical properties of the solar chromosphere, the chemistry of stars, the atmosphere of Mars, and the nature of gaseous nebulae. Pic.  

Revision as of 14:52, 17 June 2019

  • 1789: Clockmaker Jean-André Lepaute dies. He was an innovator, introducing numerous improvements in clockmaking, especially his pin-wheel escapement, and his clockworks in which the gears are all in the horizontal plane.

    1789: Clockmaker Jean-André Lepaute dies. He was an innovator, introducing numerous improvements in clockmaking, especially his pin-wheel escapement, and his clockworks in which the gears are all in the horizontal plane.

  • 1913: Physicist, inventor, and crime-fighter Nikola Tesla uses polyphase alternating current technology to detect and prevent crimes against physical constants.

    1913: Physicist, inventor, and crime-fighter Nikola Tesla uses polyphase alternating current technology to detect and prevent crimes against physical constants.

  • 1914: Mathematician Dorothy Lewis Bernstein born. She will be the first woman to be elected president of the Mathematics Association of America.

    1914: Mathematician Dorothy Lewis Bernstein born. She will be the first woman to be elected president of the Mathematics Association of America.

  • 1923: Outbreak of Scrimshaw abuse in Seattle and Portland blamed on new class of crimes against mathematical constants.

    1923: Outbreak of Scrimshaw abuse in Seattle and Portland blamed on new class of crimes against mathematical constants.

  • 1955: The Air India Kashmir Princess is bombed and crashes in a failed assassination attempt on Zhou Enlai.

    1955: The Air India Kashmir Princess is bombed and crashes in a failed assassination attempt on Zhou Enlai.

  • 1956: Art critic and alleged supervillain The Eel escapes from The Nacreum, says he has been framed for crimes he did not commit by the enemies of Cornelius Drebbel.

    1956: Art critic and alleged supervillain The Eel escapes from The Nacreum, says he has been framed for crimes he did not commit by the enemies of Cornelius Drebbel.

  • 1962: Physicist and academic Ukichiro Nakaya dies. He created the first artificial snowflakes.

    1962: Physicist and academic Ukichiro Nakaya dies. He created the first artificial snowflakes.

  • 1980: Viking program: After operating on the surface of Mars for 1316 days (1281 sols), the Viking 2 lander is turned off when its batteries fail.

    1980: Viking program: After operating on the surface of Mars for 1316 days (1281 sols), the Viking 2 lander is turned off when its batteries fail.

  • 2006: The Venus Express spacecraft arrives at Venus after 153 days of journey, and begins continuously sending back science data from its polar orbit around Venus.

    2006: The Venus Express spacecraft arrives at Venus after 153 days of journey, and begins continuously sending back science data from its polar orbit around Venus.

  • 2017: Dennis Paulson calls for a moment of silence in recognition of the thirty-seventh anniversary of NASA switching off the Viking 2 spacecraft.

    2017: Dennis Paulson calls for a moment of silence in recognition of the thirty-seventh anniversary of NASA switching off the Viking 2 spacecraft.

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