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Leviathan Of Parsonstown
Leviathan of Parsonstown, or Rosse six-foot telescope, is a historic reflecting telescope of aperture, which was the largest telescope in the world from 1845 until the construction of the Hooker Telescope in California in 1917. The Rosse six-foot telescope was built by William Parsons, 3rd Earl of Rosse on his estate, Birr Castle, at Parsonstown (now Birr, County Offaly, Birr) in Ireland. Design and construction Parsons improved the techniques of casting, grinding and polishing large telescope mirrors from speculum metal, and constructed steam-powered grinding machines for parabolic mirrors. His mirror of 1839 was cast in smaller pieces and then fitted together before grinding and polishing; its 1840 successor was cast in a single piece. In 1842, Parsons cast his first mirror, but it took another five casts before he had two ground and polished mirrors. Speculum mirrors tarnished rapidly; with two mirrors, one could be used in the telescope while the other was being re-poli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reflecting Telescope
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter Objective (optics), objectives. Almost all of the major telescopes used in astronomy research are reflectors. Many variant forms are in use and some employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a catoptrics, catoptric telescope. From the time of Newton to the 1800s, the mirror itself was made of metalusually speculum metal. This type included Newton's first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawrence Parsons, 4th Earl Of Rosse
Lawrence Parsons, 4th Earl of Rosse, (17 November 1840 – 29 August 1908) was a member of the Irish peerage and an amateur astronomer. His name is often given as Laurence Parsons. Biography He was born at Birr Castle, Parsonstown, King's County, Ireland, the son and heir of the astronomer William Parsons, 3rd Earl of Rosse who built the "Leviathan of Parsonstown" telescope, largest of its day, and his wife, the Countess of Rosse (née Mary Field), an amateur astronomer and pioneering photographer. Lawrence succeeded his father in 1867 and was educated first at home by tutors, like John Purser, and after at Trinity College Dublin and Oxford University. He was the brother of Charles Algernon Parsons, inventor of the steam turbine. He served as Chancellor of the University of Dublin between 1885 and 1908. He was Lord Lieutenant of King's County and Custos Rotulorum of King's County from 1892 to his death. He was also a Justice of the Peace for the county and was appointe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Dwarf
A red dwarf is the smallest kind of star on the main sequence. Red dwarfs are by far the most common type of fusing star in the Milky Way, at least in the neighborhood of the Sun. However, due to their low luminosity, individual red dwarfs are not easily observed. Not one star that fits the stricter definitions of a red dwarf is visible to the naked eye. Proxima Centauri, the star nearest to the Sun, is a red dwarf, as are fifty of the sixty nearest stars. According to some estimates, red dwarfs make up three-quarters of the fusing stars in the Milky Way. The coolest red dwarfs near the Sun have a surface temperature of about and the smallest have radii about 9% that of the Sun, with masses about 7.5% that of the Sun. These red dwarfs have spectral types of L0 to L2. There is some overlap with the properties of brown dwarfs, since the most massive brown dwarfs at lower metallicity can be as hot as and have late M spectral types. Definitions and usage of the term "red d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-Frequency Array (LOFAR)
The Low-Frequency Array (LOFAR) is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European countries as of 2019. Originally designed and built by ASTRON, the Netherlands Institute for Radio Astronomy, it was first opened by Beatrix of the Netherlands, Queen Beatrix of The Netherlands in 2010, and has since been operated by ASTRON on behalf first of the International LOFAR Telescope (ILT) partnership and now of the LOFAR European Research Infrastructure Consortium, ERIC by ASTRON. LOFAR consists of a vast array of omnidirectional radio antennas using a modern concept, in which the signals from the separate antennas are not connected directly electrically to act as a single large antenna, as they are in most array antennas. Instead, the LOFAR dipole antennas (of two types) are distributed in stations, within which the antenna signals can be partly combined in analogue electronics, then digitised, then combined again a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mary Rosse
Mary Parsons, Countess of Rosse (; 14 April 1813 – 1885), was an Anglo-Irish amateur astronomer, architect, furniture designer, and pioneering photographer. Often known simply as Mary Rosse, she was one of the early practitioners of making photographs from waxed-paper negatives. Early life Mary Field was born on 14 April 1813, at Heaton Hall, Heaton, Bradford, Yorkshire, the daughter of John Wilmer Field, a wealthy estate owner. She had a sister, Delia, and they were educated at home by Susan Lawson, a governess who encouraged the young Mary's creativity and broad interests, including astronomy. The sister were joint heirs to their father's fortune. Through her family she met the future 3rd Earl of Rosse, then Lord Oxmantown (1800–1867), an Anglo-Irish astronomer and naturalist, and they were married on 14 April 1836. In February 1841, Lord Oxmantown succeeded his father in the family peerage to become The 3rd Earl of Rosse. They had married on 14 April 1836, her 23rd b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Tubridy
Michael "Mick" Tubridy (born 6 August 1935 at Kilrush, County Clare, Ireland) is an Irish musician, step dancer and structural engineer. Career In November 1962, he was a founder member of the traditional Irish music group, The Chieftains, with whom he played the tin whistle, Irish flute, and concertina; he remained a member of the group until 1979. In 1998 he published "A Selection of Irish Traditional Step Dances," a guide to ''sean nós'' (old-style) step dancing in which he recorded the steps of renowned Clare dancing masters James Keane and Dan Furey using a system of notation of his own invention. He is a member of the Craobh Naithí branch of Comhaltas Ceoltóirí Éireann and contributed to the publication of two books of Irish traditional tunes for the branch. He worked as a structural engineer until his retirement in 1993. He was responsible for the structural design of government buildings in Merrion Street, Dublin, and of the passenger terminal buildings at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Astronomy
Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the Naked eye, unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers make contributions in doing citizen science, such as by monitoring variable stars, double stars, sunspots, or occultations of stars by the Moon or asteroids, or by discovering transient astronomical events, such as comets, galactic novae or supernovae in other galaxy, galaxies. Amateur astronomers do not use the field of astronomy as their primary source of income or support, and usually have no professional degree in astrophysics or advanced academic training in the subject. Most amateurs are hobbyists, while others have a high degree of experience in astronomy and may often assist and work alongside professional astronomers. Many astronomers have studied the sky throughout history in an amateur framework; however, since the be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Engineer
Structural engineers analyze, design, plan, and research List of structural elements, structural components and structural systems to achieve design goals and ensure the safety and comfort of users or occupants. Their work takes account mainly of safety, technical, economic, and environmental concerns, but they may also consider aesthetic and social factors. Structural engineering is usually considered a specialty discipline within civil engineering, but it can also be studied in its own right. In the United States, most practicing structural engineers are currently licensed as civil engineers, but the situation varies from state to state. Some states have a separate license for structural engineers who are required to design special or high-risk structures such as schools, hospitals, or skyscrapers. In the United Kingdom, most structural engineers in the building industry are members of the Institution of Structural Engineers or the Institution of Civil Engineers. Typical struct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patrick Moore
Sir Patrick Alfred Caldwell-Moore (; 4 March 1923 – 9 December 2012) was an English amateur astronomer who attained prominence in that field as a writer, researcher, radio commentator and television presenter. Moore's early interest in astronomy led him to join the British Astronomical Association at the age of 11. He served in the Royal Air Force during World War II and briefly taught before publishing his first book on lunar observation in 1953. Renowned for his expertise in Moon observation and the creation of the Caldwell catalogue, Moore authored more than seventy astronomy books. He hosted the world's longest-running television series with the original presenter, BBC's '' The Sky at Night'', from 1957 until his death in 2012. Idiosyncrasies such as his rapid diction and monocle made him a popular and instantly recognisable figure on British television. Moore was co-founder and president of the Society for Popular Astronomy. Outside his field of astronomy, Moore appe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leviathan Birr
Leviathan ( ; ; ) is a sea serpent demon noted in theology and mythology. It is referenced in several books of the Hebrew Bible, including Psalms, the Book of Job, the Book of Isaiah, and the pseudepigraphical Book of Enoch. Leviathan is often an embodiment of chaos, threatening to eat the damned when their lives are over. In the end, it is annihilated. Christian theologians identified Leviathan with the demon of the deadly sin '' envy''. According to Ophite diagrams, Leviathan encapsulates the space of the material world. In Gnosis, it encompasses the world like a sphere and incorporates the souls of those who are too attached to material things, so they cannot reach the realm of God's fullness beyond, from which all good emanates. In Hobbes, who draws on Job 41:24, Leviathan becomes a metaphor for the omnipotence of the state, which maintains itself by educating all children in its favour, generation after generation. This idea of an eternal power that 'feeds' on its c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science Museum (London)
The Science Museum is a major museum on Exhibition Road in South Kensington, London. It was founded in 1857 and is one of the city's major tourist attractions, attracting 3.3 million visitors annually in 2019. Like other publicly funded national museums in the United Kingdom, the Science Museum does not charge visitors for admission, although visitors are requested to make a donation if they are able. Temporary exhibitions may incur an admission fee. It is one of the five museums in the Science Museum Group. Founding and history The museum was founded in 1857 under Bennet Woodcroft from the collection of the Royal Society of Arts and surplus items from the Great Exhibition as part of the South Kensington Museum, together with what is now the Victoria and Albert Museum. It included a collection of machinery which became the ''Museum of Patents'' in 1858, and the ''Patent Office Museum'' in 1863. This collection contained many of the most famous exhibits of what is now th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
