Template:Selected anniversaries/April 11: Difference between revisions
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||1854: John Park Finley born ... meteorologist and Army Signal Service officer who was the first person to study tornadoes intensively. He also wrote the first known book on the subject as well as many other manuals and booklets, collected vast climatological data, set up a nationwide weather observer network, started one of the first private weather enterprises, and opened an early aviation weather school. Pic. | ||1854: John Park Finley born ... meteorologist and Army Signal Service officer who was the first person to study tornadoes intensively. He also wrote the first known book on the subject as well as many other manuals and booklets, collected vast climatological data, set up a nationwide weather observer network, started one of the first private weather enterprises, and opened an early aviation weather school. Pic. | ||
||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. | |||
||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/ | ||
Revision as of 08:35, 10 April 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.
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.
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.
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.
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.
2017: Dennis Paulson calls for a moment of silence in recognition of the thirty-seventh anniversary of NASA switching off the Viking 2 spacecraft.