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Gerrit Pels
Gerrit Pels (1893, Woerden – 1966, Leiden?) was a Dutch astronomer, a lifelong member of the scientific staff of the Leiden Observatory. After following secondary school in Utrecht (city), Utrecht, he was appointed "computer" at the Leiden observatory in 1919. Starting circa 1924, he studied Jupiter's Galilean satellites, minor planets, comets, and the proper motions of faint stars, in particular members of the Hyades (star cluster), Hyades cluster. He computed orbital characteristics for many of the minor planets discovered by Hendrik van Gent. Much of his work he did in collaboration with his wife, Helena Kluyver (1909-2001). at the Netherlands Institute for Radio Astronomy website She, together with Jan Oort, published their work on the Hyades clu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woerden
Woerden () is a city and a municipality in central Netherlands. Due to its central location between Amsterdam, Rotterdam, The Hague, and Utrecht, and the fact that it has rail and road connections to those cities, it is a popular town for commuters who work in those cities. History The river Oude Rijn used to flow through the city center of Woerden, but in 1960 the old river was diverted around the city center. The city has a long and rich history in cheese making and trading; for years Gouda cheese for domestic and international use has been produced in this region. Woerden still holds its authentic (since 1885) cheese market at the market place in its center. Roman castellum Woerden is situated on the river Oude Rijn, near the confluence with the former stream. The lower stretch of the Linschoten stream from Montfoort and Linschoten to Woerden silted up a long time ago and its flow was diverted through the Lek and Hollandse IJssel rivers, but at one time it was an im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helena Kluyver
Helena may refer to: People *Helena (given name), a given name (including a list of people and characters with the name) *Katri Helena (born 1945), Finnish singer *Helena, mother of Constantine I Places Greece * Helena (island) Guyana * Helena, Guyana United States * Helena, Montana, the capital of Montana ** Helena National Forest, Montana ** Helena, Montana micropolitan area ** Lake Helena, Montana * Helena, Alabama * Helena, Arkansas ** Battle of Helena, July 4, 1863, during the American Civil War * Helena, California * Helena, Georgia * Helena, Louisiana * Helena Township, Michigan * Helena, Huron County, Michigan * Helena, Marquette County, Michigan * Helena Township, Minnesota * Helena, Mississippi * Helena, Missouri * Helena, New York * Helena, Ohio * Helena, Oklahoma * Helena, South Carolina * Helena, Texas * Helena, Wisconsin Canada * Helena Island (Nunavut) * Helena Lake, Saskatchewan Films * ''Helena'' (1924 film), a silent German film directed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1966 Deaths
Events January * January 1 – In a coup, Colonel Jean-Bédel Bokassa takes over as military ruler of the Central African Republic, ousting President David Dacko. * January 3 – 1966 Upper Voltan coup d'état: President Maurice Yaméogo is deposed by a military coup in the Republic of Upper Volta (modern-day Burkina Faso). * January 10 ** Pakistani–Indian peace negotiations end successfully with the signing of the Tashkent Declaration, a day before the sudden death of Indian prime minister Lal Bahadur Shastri. ** Georgia House of Representatives, The House of Representatives of the US state of Georgia refuses to allow African-American representative Julian Bond to take his seat, because of his anti-war stance. ** A Commonwealth Prime Ministers' Conference convenes in Lagos, Nigeria, primarily to discuss Rhodesia. * January 12 – United States President Lyndon Johnson states that the United States should stay in South Vietnam until Communism, Communist aggression there is e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1893 Births
Events January–March * January 2 – Webb C. Ball introduces railroad chronometers, which become the general railroad timepiece standards in North America. * Mark Twain started writing Puddn'head Wilson. * January 6 – The Washington National Cathedral is chartered by Congress; the charter is signed by President Benjamin Harrison. * January 13 ** The Independent Labour Party of the United Kingdom has its first meeting. ** U.S. Marines from the ''USS Boston'' land in Honolulu, Hawaii, to prevent the queen from abrogating the Bayonet Constitution. * January 15 – The ''Telefon Hírmondó'' service starts with around 60 subscribers, in Budapest. * January 17 – Overthrow of the Kingdom of Hawaii: Lorrin A. Thurston and the Citizen's Committee of Public Safety in Hawaii, with the intervention of the United States Marine Corps, overthrow the government of Queen Liliuokalani. * January 21 ** The Cherry Sisters first perform in Marion, Iowa. ** The T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Berlin Heidelberg
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ..., it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second largest academic publisher with 65 staff in 1872 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minor Planet Circulars
The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under the auspices of the International Astronomical Union (IAU). Founded in 1947, it operates at the Smithsonian Astrophysical Observatory. Function The Minor Planet Center is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids), calculating their orbits and publishing this information via the '' Minor Planet Circulars''. Under the auspices of the International Astronomical Union (IAU), it operates at the Smithsonian Astrophysical Observatory, which is part of the Center for Astrophysics along with the Harvard College Observatory. The MPC runs a number of free online services for observers to assist them in observing minor planets and comets. The complete catalogue of minor planet orbits (sometimes referred to as the "Minor Planet Catalogue") may also be freely downloaded. In addition to astrometric data, the MPC collect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1667 Pels
Events January–March * January 11 – Aurangzeb, monarch of the Mughal Empire, orders the removal of Rao Karan Singh as Maharaja of the Bikaner State (part of the modern-day Rajasthan state of India) because of Karan's dereliction of duty in battle. * January 19 – The town of Anzonico in Switzerland is destroyed by an avalanche. * January 27 – The 2,000 seat Opernhaus am Taschenberg, a theater in Dresden (capital of the Electorate of Saxony) opens with its first production, Pietro Ziani's opera ''Il teseo''. * February 5 – In the Second Anglo-Dutch War, the English Royal Navy warship HMS ''Saint Patrick'' is captured less than nine months after being launched, when it fights a battle off the coast of England and North Foreland, Kent. Captain Robert Saunders and 8 of his crew are killed while fighting the Dutch ships ''Delft'' and ''Shakerlo''. The Dutch Navy renames the ship the ''Zwanenburg''. * February 6 (January 27 O.S.) – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main-belt
The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called asteroids or minor planets. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System such as near-Earth asteroids and trojan asteroids. The asteroid belt is the smallest and innermost known circumstellar disc in the Solar System. About 60% of its mass is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid belt is calculated to be 3% that of the Moon. Ceres, the only object in the asteroid belt large enough to be a dwarf planet, is about 950 km in diameter, whereas Vesta, Pallas, and Hygiea have mean diameters less than 600 km. The remaining bodies range down to the size of a dust particle. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomy And Astrophysics
''Astronomy & Astrophysics'' is a monthly peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics. The journal is run by a Board of Directors representing 27 sponsoring countries plus a representative of the European Southern Observatory. The journal is published by EDP Sciences and the editor-in-chief is . History Origins ''Astronomy and Astrophysics'' (A&A) was created as an answer to the publishing scenario found in Europe in the 1960s. At that time, multiple journals were being published in several countries around the continent. These journals usually had a limited number of subscribers, and published articles in languages other than English, resulting in a small number of citations compared to American and British journals. Starting in 1963, conversations between astronomers from European countries assessed the need for a common astronomical journal. On 8 April 1968, leading astronomers from Belgium, Denmark, Fran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jan Oort
Jan Hendrik Oort ( or ; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy. His ''New York Times'' obituary called him "one of the century's foremost explorers of the universe"; the European Space Agency website describes him as "one of the greatest astronomers of the 20th century" and states that he "revolutionised astronomy through his ground-breaking discoveries." In 1955, Oort's name appeared in ''Life (magazine), Life'' magazine's list of the 100 most famous living people. He has been described as "putting the Netherlands in the forefront of postwar astronomy." Oort determined that the Milky Way rotates and overturned the idea that the Sun was at its center. He also postulated the existence of the mysterious invisible dark matter in 1932, which is believed to make up roughly 84.5% of the total matter in the Universe and whose gravitational ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hendrik Van Gent
Hendrik van Gent (14 September 1899, Pernis – March 29, 1947, Amsterdam)''Album studiosorum Academiæ lugduno-batavæ MDCCCLXXV-MCMXXV'', A. W. Sijthoff, 1925, p. 376 was a Dutch astronomer. He moved to South Africa in 1928 in order to observe the southern sky at the Leiden Southern Station and the Union Observatory in Johannesburg. He obtained his PhD from Leiden University in 1931. He studied variable stars and also discovered three comets, namely C/1941 K1, C/1944 K2 and C/1943 W1. The Minor Planet Center credits him with the discovery of 39 numbered minor planets during 1929–1935. He died of a heart attack at the age of 47 while on leave in the Netherlands. The crater ''Van Gent Van Gent is a Dutch toponymic surname indicating an origin in the city Ghent, East Flanders. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
