In 1807, the first meteorite strike to be recorded in the U.S. fell at Weston (now called Easton), Conn., at 6:30 a.m., making a hole 5-ft long and 4.5-ft wide. This was the New World's first witnessed fall of a meteorite, with subsequent recovery of specimens, since the arrival of the European settlers. Yale Professor Benjamin Silliman's description of the fall and his chemical analysis of the stone meteorite, the first performed in the U.S., received much attention in the national and international press. A thirty-pound fragment of this Chondrite H4 became the nucleus of Yale University’s Peabody Museum. This meteorite collection, the oldest in the country, was begun by Silliman.
1897 Francesco Brioschi (22 December 1824 – 13 December 1897) was an Italian mathematician born in Milan in 1824. From 1850 he taught analytical mechanics in the University of Pavia. After the Italian unification in 1861, he was elected depute in the Parliament of Italy and then appointed twice secretary of the Education Minister. In 1863 he founded the Politecnico di Milano university, where he worked until death. In 1870 he became member of the National Academy of the Lincei and in 1884 he succeed Quintino Sella as president of the National Academy of the Lincei. He directed the Il Politecnico (English translation: The Polytechnic) review and, between 1867 and 1877, Annali di matematica pura e applicata (English translation: Annals of pure and applied mathematics). He died in Milan in 1897.
As mathematician, Brioschi publicized in Italy various algebraic theories and studied the problem of solving fifth and sixth grade equations using elliptic functions. Brioschi is also remembered as a distinguished teacher: among his students in the University of Pavia there were Eugenio Beltrami, Luigi Cremona and Felice Casorati.
1927 Yulian-Karl Vasilievich Sokhotsky (2 Feb 1842 in Warsaw, Poland - 14 Dec 1927 in Leningrad, USSR (now St Petersburg, Russia)) The magister's thesis of Sokhotskii was the first research paper on complex analysis published in Russian. It contains many important results which were later ascribed to other mathematicians. First of all, there is the famous theorem on the behaviour of an analytic function in a neighbourhood of an essential singularity. This theorem was published by Sokhotskii (in his magister's thesis) and by Casorati in 1868, whereas Weierstrass published it eight years later - in 1876. Furthermore, Sokhotskii was the first to apply the calculus of residues to Legendre polynomials. The credit for this procedure is usually given to Hermann Laurent. Finally, the so-called Plemelj formulas are also due to Sokhotskii, who published them in his doctor's thesis in 1873, that is to say 35 years before Plemelj.
1976 Donald H(oward) Menzel (11 Apr 1901, 14 Dec 1976) was an American astronomer best known for his arguments against the existance of extraterrestrial UFO's. Menzel was one of the first practitioners of theoretical astrophysics in the United States and pioneered the application of quantum mechanics to astronomical spectroscopy. An authority on the sun's chromosphere, he discovered with J. C. Boyce (1933) that the sun's corona contains oxygen. With W. W. Salisbury he made (1941) the first of the calculations that led to radio contact with the moon in 1946. He supervised the assignment of names to newly discovered lunar features.
1989 Andrey Dmitriyevich Sakharov (21 May 1921, 14 Dec 1989) Soviet nuclear physicist, an outspoken advocate of human rights in the Soviet Union. At the end of World War II, Sakharov returned to pure science and the study of cosmic rays. Two years later, he began work with a secret research group on the development of the hydrogen bomb, and he is believed to have been principally responsible for the Soviets' success in exploding their first thermonuclear bomb (1954). With I.E. Tamm, he proposed controlled thermonuclear fusion by confining an extremely hot ionized plasma in a torus-shaped magnetic bottle, known as a tokamak device. He became politically more active in the 1960s, campaigned against nuclear proliferation, and from 1980 to 1986, he was banished and kept under police surveillance.
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