His enthusiastic support of astronomy and the ASP brought in many new members, and he personally mentored many students. “Carlie” ~ (1868-1951), American astronomer secretary/treasurer of the Astronomical Society of the Pacific (1925-1950). Adams, a quiet, unambitious man, was content to share the credit.Īlso Charles H. Le Verrier resented the effort to have Adams declared the sole discoverer of Neptune. After the discovery of Neptune, the director of the Cambridge Observatory pointed out that Adams had been the first to predict the presence of Neptune. Galle acted on Le Verrier’s work and became the first person to observe Neptune. Several months later, Urbain le Verrier (q.v.) submitted similar work to Johann Gottfried Galle (q.v.), the director of the Berlin Observatory. Once Adams did put his work on paper, he submitted it to the director of the Cambridge Observatory, who took no action on his work. All of the calculations were worked out in his head before he ever wrote them down. Adams theorized that the unexpected planetary orbit could be due to the presence of an as yet undiscovered planet in the vicinity, and that the new planet was twice as far from the Sun as Uranus. Johns College, Cambridge, he performed an investigation to explain the reason for the irregularities in the motion of the planet Uranus. John Couch ~ (1819-1892), British mathematician and astronomer as an undergraduate at St. ![]() His Tractado de las drogas y medicinas de las Indias orientales contains systematic, first hand observations on Eastern medicines. Ismail Abu’l Fida, or ~ (1273-1331), Syrian geographer wrote Thakwim el-Boldan (“The true position of the countries”), in which he used astronomically-determined locations and the Columns of Hercules as a reference point for the longitude.Ĭristobal ~ (1515-1580), Portuguese doctor and natural historian a pioneers in studying the plants of the Orient, especially in their pharmaceutical uses. As an astronomer, he discussed different movernents of the Moon and discovered ‘variation.’ He was also one of the last Arabic translators and commentators of Greek works. ![]() He developed a new method of constructing sine tables, the value of sin 30′ being correct to the eighth decimal place. N.B., The minor planet (2646) Abetti is named in honor of the Abettis.Ībul Wafa Muhammad Ibn Muhammad Ibn Yahya Ibn Ismail al-Buzjani (940-997), Persian mathematician and astronomer, born in Buzjan, Nishapur first to show the generality of the sine theorem relative to spherical triangles. Vice president of the International Astronomical Union. In 1874, he observed the transit of Venus across the Sun’s disk through a spectroscope, the first time the instrument was used for this purpose.Īlso Georgio ~ (1882-1982), Italian astronomer, son of Antonio ~ after serving as assistant astronomer at the observatory of the Collegio Romano in Rome, he succeeded his father as director of the astrophysical observatory at Arcetri (1921). Died of tuberculosis at age 26.Ībraham Bar Rabbi ben-Ezra, or ~ of Toledo (1092-1167), Spanish-Jewish mathematician and astronomer published the renowned mathematic works “Book of Unity,” “Book of Numbers” and “Stratagem” in Hebrew.Īntonio ~ (1846-1928), Italian civil engineer and astronomer director of the observatory in Arcetri and professor of astronomy at the University of Florence. Commutative groups are called Abelian Groups in his honor. Niels Henrik ~ (1802-1829), Norwegian mathematician investigated generalizations of the binomial theorem, pioneered in the general theory of elliptic functions, and showed that elliptic functions are a generalization of trigonometric functions. After serving as a judge in his country’s national courts, Abduh became grand mufti, Egypt’s highest official interpreter of the shari’a (Islamic law). Mohammed ~ (1849-1905), Egyptian reformer pioneer of Islamic modernism and nationalism who preached Muslim unity against Western imperialism. Invented the apochromatic lens system for the microscope.Ĭharles Greeley ~ (1872-1973), American astrophysicist as director of the Smithsonian Astrophysical Observatory (Washington, D.C.) for almost four decades, he engaged in a career-long campaign to demonstrate that the Sun’s energy output varies and has a measurable effect on the Earth’s weather. ![]() ~ (1840-1905), German educator, optician, physicist and astronomer appointed professor of physics and mathematics at the University of Jena (1870) and director of the astronomical and meteorological observatories at Jena (1878).
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