Template:Selected anniversaries/August 23: Difference between revisions
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||1953: RDS-4 (also known as Tatyana) was a Soviet nuclear bomb that was first tested at Semipalatinsk Test Site, on August 23, 1953. The device weighed approximately 1200 kg (2646 lb). The device was approximately one-third the size of the RDS-3. The bomb was dropped from an IL-28 aircraft at an altitude of 11 km and exploded at 600 m, with a yield of 28 kt. | ||1953: RDS-4 (also known as Tatyana) was a Soviet nuclear bomb that was first tested at Semipalatinsk Test Site, on August 23, 1953. The device weighed approximately 1200 kg (2646 lb). The device was approximately one-third the size of the RDS-3. The bomb was dropped from an IL-28 aircraft at an altitude of 11 km and exploded at 600 m, with a yield of 28 kt. | ||
||1954: Jaan Sarv dies ... mathematician and scholar. | ||1954: Jaan Sarv dies ... mathematician and scholar. Pic. | ||
||1956: Mathematician Andreas Floer. He will make seminal contributions to the areas of geometry, topology, and mathematical physics, in particular the invention of Floer homology. Pic. | ||1956: Mathematician Andreas Floer. He will make seminal contributions to the areas of geometry, topology, and mathematical physics, in particular the invention of Floer homology. Pic. | ||
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File:First view of Earth from Moon.jpg|link=Lunar Orbiter 1 (nonfiction)|1966: [[Lunar Orbiter 1 (nonfiction)|Lunar Orbiter 1]] takes the first photograph of Earth from orbit around the Moon. | File:First view of Earth from Moon.jpg|link=Lunar Orbiter 1 (nonfiction)|1966: [[Lunar Orbiter 1 (nonfiction)|Lunar Orbiter 1]] takes the first photograph of Earth from orbit around the Moon. | ||
||1973: A bank robbery gone wrong in Stockholm, Sweden, turns into a hostage crisis; over the next five days the hostages begin to | ||1973: A bank robbery gone wrong in Stockholm, Sweden, turns into a hostage crisis; over the next five days the hostages begin to sympathize with their captors, leading to the term "Stockholm syndrome". | ||
||1973: Hellmuth Kneser dies ... mathematician, who made notable contributions to group theory and topology. His most famous result may be his theorem on the existence of a prime decomposition for 3-manifolds. His proof originated the concept of normal surface, a fundamental cornerstone of the theory of 3-manifolds. | ||1973: Hellmuth Kneser dies ... mathematician, who made notable contributions to group theory and topology. His most famous result may be his theorem on the existence of a prime decomposition for 3-manifolds. His proof originated the concept of normal surface, a fundamental cornerstone of the theory of 3-manifolds. Pic. | ||
||1977: Bryan Allen won the Kremer Prize for the first human-powered flight as he pedalled the Gossamer Condor for at least a mile at Schafter, California. | ||1977: Bryan Allen won the Kremer Prize for the first human-powered flight as he pedalled the Gossamer Condor for at least a mile at Schafter, California. | ||
Revision as of 10:46, 26 February 2019
1638: Descartes' proposal. René Descartes, in a letter to Marin Mersenne, proposed his folium (x-cubed + y-cubed = 2axy) as a test case to challenge Pierre de Fermat's differentiation techniques. To Descartes' embarrassment, Fermat's method worked.
1829: Mathematician and historian Moritz Cantor born. He will write Vorlesungen über Geschichte der Mathematik, which traces the history of mathematics up to 1799.
1946: Signed first edition of Alice and Niles Dancing sells for ten thousand dollars in charity auction to benefit victims of crimes against mathematical constants.
1966: Lunar Orbiter 1 takes the first photograph of Earth from orbit around the Moon.
1999: Sensors on the Mir spacecraft detect patterns of electricity which reveal existence of a vast electrical intelligence in the Earth's ionosphere, now known as AESOP.
1999: Biochemist and crystallographer John Kendrew dies. He shared the 1962 Nobel Prize for chemistry with Max Perutz for determining the atomic structures of proteins using X-ray crystallography.
2017: Reality TV show Dennis Paulson of Mars wins Pulitzer Prize for Most Innovative Programming.