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H. R. Morgan
Herbert Rollo Morgan (21 March 1875 – 11 June 1957) was an American astronomer. His major lifetime work was on the production of the Catalog of 5,268 Standard Stars Based on the Normal System N30 published in 1952. Morgan was born near Medford, Minnesota to Henry and Olive Sabre Smith Morgan. He became asthmatic an early age and the family moved to Tennessee where he studied. He obtained an AB from the University of Virginia, followed by a PhD in 1901. He received a Vanderbilt Fellowship at the Leander McCormick Observatory. He then worked at the US Naval Observatory as a computer and moved to Pritchett College in 1905 as a professor of mathematics. In 1907 he joined the Naval Observatory as an assistant astronomer and began to work on a catalog until his retirement in 1944. He then worked as a research associate at Yale University. His work on cataloguing recorded the positions, luminosities, and motions of 5268 stars. Morgan married Fannie Evelyn Wallis in 1904 and they ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catalog Of 5,268 Standard Stars Based On The Normal System N30
Catalog of 5,268 Standard Stars Based on the Normal System N30 is the 1952 auxiliary star catalogue created by Herbert Rollo Morgan to address proper motion inaccuracies in 19th century observations by converting contemporary catalogues from a mean epoch around 1900 (±0.1 yr) to epoch ''and'' equinox 1950.0. However, the positions were derived from more than 70 recent catalogs with epochs of observation between 1917 and 1949. The N30 system is independent from any other astrometric system. Independent proper motions were determined by comparing the 1930 normal positions with the normal positions at the mean epoch, 30 years earlier, in the Albany General Catalogue, corrected by Morgan in 1948. Its primary use is the incorporation of 19th century astronomical data into modern research, and includes Harvard photometric magnitude, Henry Draper (HD) spectral type, and proper motion. See also * B1950 * J2000 In astronomy, an epoch or reference epoch is a moment in time used as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medford, Minnesota
Medford is a city in Steele County, Minnesota, United States. The population was 1,239 at the 2010 census. History Medford was platted in 1856, and named for Medford Colling, the son of an early settler. A post office has been in operation at Medford since 1855. Geography According to the United States Census Bureau, the city has a total area of , all land. The Straight River flows through the city. Interstate 35 and Steele County Roads 1, 12, 22, 23, and 45 are the main routes in the community. Demographics 2010 census As of the census of 2010, there were 1,239 people, 450 households, and 336 families living in the city. The population density was . There were 470 housing units at an average density of . The racial makeup of the city was 96.3% White, 0.9% African American, 0.1% Native American, 0.6% Asian, 0.8% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 5.2% of the population. There were 450 households, of which 42.9% had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Virginia
The University of Virginia (UVA) is a public research university in Charlottesville, Virginia. Founded in 1819 by Thomas Jefferson, the university is ranked among the top academic institutions in the United States, with College admissions in the United States, highly selective admission. Set within the The Lawn, Academical Village, a World Heritage Site, UNESCO World Heritage Site, the university is referred to as a "Public Ivy" for offering an academic experience similar to that of an Ivy League university. It is known in part for certain rare characteristics among public universities such as #1800s, its historic foundations, #Honor system, student-run academic honor code, honor code, and Secret societies at the University of Virginia, secret societies. The original governing Board of Visitors included three List of presidents of the United States, U.S. presidents: Thomas Jefferson, Jefferson, James Madison, and James Monroe. The latter as sitting President of the United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McCormick Observatory
The Leander McCormick Observatory is one of the astronomical observatories operated by the Department of Astronomy of the University of Virginia, and is situated just outside Charlottesville, Virginia (US) in Albemarle County on the summit of Mount Jefferson (also known as Observatory Hill). It is named for Leander J. McCormick (1819–1900), who provided the funds for the telescope and observatory. History Origin and construction Leander McCormick was the son of Robert McCormick (1780–1846), the inventor of a mechanical reaper, and brother of Cyrus H. McCormick, who patented it and undertook the large scale manufacture and marketing of the invention. The McCormick family's homestead of Walnut Grove was located near Raphine, Virginia, although they moved to Chicago in 1848 to manufacture the reaper on a large scale. In Chicago, Cyrus, Leander and their brother William founded what became the McCormick Harvesting Machine Company and eventually International Harvester. In 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Naval Observatory
United States Naval Observatory (USNO) is a scientific and military facility that produces geopositioning, navigation and timekeeping data for the United States Navy and the United States Department of Defense. Established in 1830 as the Depot of Charts and Instruments, it is one of the oldest scientific agencies in the United States, and remains the country's leading authority for astronomical and timing data for all purposes. The observatory is located in Northwest Washington, D.C. at the northwestern end of Embassy Row. It is among the few pre-20th century astronomical observatories located in an urban area; initially located in Foggy Bottom near the city's center, it was relocated to its current location in 1893 to escape light pollution. The USNO has conducted significant scientific studies throughout its history, including measuring the speed of light, observing solar eclipses, and discovering the moons of Mars. Its achievements including providing data for the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer (occupation)
The term "computer", in use from the early 17th century (the first known written reference dates from 1613), meant "one who computes": a person performing mathematical calculations, before electronic computers became commercially available. Alan Turing described the "human computer" as someone who is "supposed to be following fixed rules; he has no authority to deviate from them in any detail." Teams of people, often women from the late nineteenth century onwards, were used to undertake long and often tedious calculations; the work was divided so that this could be done in parallel. The same calculations were frequently performed independently by separate teams to check the correctness of the results. Since the end of the 20th century, the term "human computer" has also been applied to individuals with prodigious powers of mental arithmetic, also known as mental calculators. Origins in sciences Astronomers in Renaissance times used that term about as often as they called thems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pritchett College
Pritchett College was a small institution that operated in Glasgow, Missouri from 1866 until 1922. It was founded as Pritchett School Institute and became known as Pritchett College after 1897. History The first classes were conducted in the 1866–67 academic year at 3rd and Market Streets in buildings that previously housed Glasgow Female Seminary. Rev. James O. Swinney provided funds and organized the school. The first Board of Trustees appointed by the Glasgow, Missouri, Glasgow city council were James O. Swinney, Henry C. Cockerill, and Joshua Belden. Carr Waller Pritchett, Sr., Carr W. Pritchett, formerly a faculty member at Howard-Payne Junior College, Howard College in Fayette, Missouri, was hired to serve as the first president and the institution was known as Pritchett School Institute. The school was Christian, non-denominational and admission was open for both males and females. Initial enrollment was 146 students. Swinney later donated money to purchase new groun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yale University
Yale University is a Private university, private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the List of Colonial Colleges, third-oldest institution of higher education in the United States and among the most prestigious in the world. It is a member of the Ivy League. Chartered by the Connecticut Colony, the Collegiate School was established in 1701 by clergy to educate Congregationalism in the United States, Congregational ministers before moving to New Haven in 1716. Originally restricted to theology and sacred languages, the curriculum began to incorporate humanities and sciences by the time of the American Revolution. In the 19th century, the college expanded into graduate and professional instruction, awarding the first Doctor of Philosophy, PhD in the United States in 1861 and organizing as a university in 1887. Yale's faculty and student populations grew after 1890 with rapid expansion of the physical campus and sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Astronomical Journal
''The Astronomical Journal'' (often abbreviated ''AJ'' in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing. It is one of the premier journals for astronomy in the world. Until 2008, the journal was published by the University of Chicago Press on behalf of the AAS. The reasons for the change to the IOP were given by the society as the desire of the University of Chicago Press to revise its financial arrangement and their plans to change from the particular software that had been developed in-house. The other two publications of the society, the ''Astrophysical Journal'' and its supplement series, followed in January 2009. The journal was established in 1849 by Benjamin A. Gould. It ceased publication in 1861 due to the American Civil War, but resumed in 1885. Between 1909 and 1941 the journal was edited in Albany, New York. In 1941, editor Benjamin Boss arrange ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1875 Births
Events January–March * January 1 – The Midland Railway of England abolishes the Second Class passenger category, leaving First Class and Third Class. Other British railway companies follow Midland's lead during the rest of the year (Third Class is renamed Second Class in 1956). * January 5 – The Palais Garnier, one of the most famous opera houses in the world, is inaugurated in Paris. * January 12 – Guangxu Emperor, Guangxu becomes the 11th Qing Dynasty Emperor of China at the age of 3, in succession to his cousin. * January 14 – The newly proclaimed King Alfonso XII of Spain (Queen Isabella II's son) arrives in Spain to restore the monarchy during the Third Carlist War. * February 3 – Third Carlist War – Battle of Lácar: Carlist commander Torcuato Mendiri, Torcuato Mendíri secures a brilliant victory, when he surprises and routs a Government force under General Enrique Bargés at Lácar, east of Estella, nearly capturing newly cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1957 Deaths
1957 ( MCMLVII) was a common year starting on Tuesday of the Gregorian calendar, the 1957th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 957th year of the 2nd millennium, the 57th year of the 20th century, and the 8th year of the 1950s decade. Events January * January 1 – The Saarland joins West Germany. * January 3 – Hamilton Watch Company introduces the first electric watch. * January 5 – South African player Russell Endean becomes the first batsman to be dismissed for having ''handled the ball'', in Test cricket. * January 9 – British Prime Minister Anthony Eden resigns. * January 10 – Harold Macmillan becomes Prime Minister of the United Kingdom. * January 11 – The African Convention is founded in Dakar. * January 14 – Kripalu Maharaj is named fifth Jagadguru (world teacher), after giving seven days of speeches before 500 Hindu scholars. * January 15 – The film '' Throne of Blood'', Akira Kurosawa's reworking of ''Mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
