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Hoober Observatory
J A Jones Hoober Observatory is a privately owned observatory located in South Yorkshire, England near to the villages of Hoober and Wentworth, North-northwest of Rotherham. It can be found about east of Hoober Stand. The observatory is owned and operated by Mexborough & Swinton Astronomical Society (NPO). Architecture and design The observatory consists of a square building topped by a 5-metre diameter dome. The observatory was built by the members between 1991 and 1993. Originally the dome was only in diameter. In 1999 a major refurbishment of the observatory was completed including a new 5-metre diameter dome, which was designed & built by the members over the preceding 3–4 years. A project is currently underway (2018) to extend the observatory by adding a 5-metre square extension (public room). The building is also undergoing extensive refurbishment inside and outside to create a toilet and improve facilities for disabled visitors. It is projected that the completi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celestron
Celestron is an American company based in Torrance, California, United States, that manufactures telescopes and distributes telescopes, binoculars, spotting scopes, microscopes, and accessories manufactured by its parent company, the Synta Technology Corporation of Taiwan. History The predecessor of Celestron was Valor Electronics, an electronics and military components firm founded in 1955 by Tom Johnson. Johnson became involved with telescopes when he built a 6" reflecting telescope for his two sons. In 1960, Johnson established the "Astro-Optical" division of Valor, which would later become Celestron. By 1964, Johnson had founded "Celestron Pacific" as a division of Valor Electronics offering Schmidt-Cassegrain telescopes from 4" to 22". In 1970 Celestron introduced its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope, the first of a new line of telescopes built using methods developed by Celestron to produce Schmidt-Cassegrains at a high volume and low cost. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MSAS Logo Est 1978
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MSAS may refer to: * Multi-functional Satellite Augmentation System *Mansfield and Sutton Astronomical Society * Marine Study Aquatic Society *Mexborough and Swinton Astronomical Society * Microsoft Analysis Services See also *MSA (other) MSA or M.S.A. may refer to: Organizations and businesses Public services and agencies * China Maritime Safety Administration, a PRC Coast Guard * Maritime Safety Agency, now the Japan Coast Guard * Indonesian Maritime Security Agency * Pakista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apparent Magnitude
Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's light caused by interstellar dust along the line of sight to the observer. The word ''magnitude'' in astronomy, unless stated otherwise, usually refers to a celestial object's apparent magnitude. The magnitude scale dates back to the ancient Roman astronomer Claudius Ptolemy, whose star catalog listed stars from 1st magnitude (brightest) to 6th magnitude (dimmest). The modern scale was mathematically defined in a way to closely match this historical system. The scale is reverse logarithmic: the brighter an object is, the lower its magnitude number. A difference of 1.0 in magnitude corresponds to a brightness ratio of \sqrt /math>, or about 2.512. For example, a star of magnitude 2.0 is 2.512 times as bright as a star of magnitude 3.0 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naked Eye
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying, light-collecting optical instrument, such as a telescope or microscope, or eye protection. Vision corrected to normal acuity using corrective lenses is still considered "naked". In astronomy, the naked eye may be used to observe celestial events and objects visible without equipment, such as conjunctions, passing comets, meteor showers, and the brightest asteroids, including 4 Vesta. Sky lore and various tests demonstrate an impressive variety of phenomena visible to the unaided eye. Basic properties Some basic properties of the human eye are: *Quick autofocus from distances of 25 cm (young people) to 50 cm (most people 50 years and older) to infinity. *Angular resolution: about 1 arcminute, approximately 0.017° or 0.0003 radians, which corresponds to 0.3 m at a 1 km distance. *Field of view (FOV): simultaneous visual percept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swinton, South Yorkshire
Swinton is a town in the Metropolitan Borough of Rotherham, in South Yorkshire, England on the west bank of the River Don. It has a population of 15,559 (2011). The town is five miles north-northeast of the larger town of Rotherham and directly west-southwest of Mexborough. The original junior and infant school building built 1852 on Church Street formerly Fitzwilliam School still exists being converted into residential apartments called 'Fitzwilliam Lodge' History The town was once a centre for the manufacture of pottery of international importance, and deep coal mining, glassmaking, canal barge-building and engineering. It is known for the Rockingham Pottery, a world-renowned manufacturer of porcelain. Although the factory closed in 1842, its name defines a style of rococo porcelain. There were several other potteries in the area during the 19th century. One of the original kilns, the Rockingham, or Waterloo, Kiln, a small part of the factory, a gatehouse (both now priv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexborough
Mexborough is a town in the City of Doncaster in South Yorkshire, England. Situated between Manvers and Denaby Main, it lies on the River Don close to where it joins the River Dearne, and the A6023 road runs through the town. It is contiguous with the town of Swinton which is directly to the southwest immediately across the railway and Conisbrough to the east. Historically part of the West Riding of Yorkshire, Mexborough has a population of 14,750, increasing to a ward population of 15,244 at the 2011 Census. History The name ''Mexborough'' combines the Old English suffix ''burh'', meaning a fortified place, with an Old English or Old Norse personal name, which may be ''Meke'', ''Muik'', ''Meoc'' or ''Mjukr''. Mexborough is located at the north-eastern end of a dyke known as the ''Roman Ridge'', which is thought to have been constructed either by the Brigantian tribes in the 1st century AD, perhaps as a defence against the Roman invasion of Britain, or after the 5th c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doncaster
Doncaster (, ) is a city in South Yorkshire, England. Named after the River Don, it is the administrative centre of the larger City of Doncaster. It is the second largest settlement in South Yorkshire after Sheffield. Doncaster is situated in the Don Valley on the western edge of the Humberhead Levels and east of the Pennines. At the 2021 census, the city had a population of 308,100, while its built-up area had a population of 158,141 at the 2011 census. Sheffield lies south-west, Leeds north-west, York to the north, Hull north-east, and Lincoln south-east. Doncaster's suburbs include Armthorpe, Bessacarr and Sprotbrough. The towns of Bawtry, Mexborough, Conisbrough, Hatfield and Stainforth, among others, are only a short distance away within the metropolitan borough. The towns of Epworth and Haxey are a short distance to the east in Lincolnshire, and directly south is the town of Harworth Bircotes in Nottinghamshire. Also, within the city's vicinity are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnsley
Barnsley () is a market town in South Yorkshire, England. As the main settlement of the Metropolitan Borough of Barnsley and the fourth largest settlement in South Yorkshire. In Barnsley, the population was 96,888 while the wider Borough has seen an increase of 5.8%, from 231,200 in 2011 census to 244,600 in 2021 census. Historically in the West Riding of Yorkshire, it is located between the cities of Sheffield, Manchester, Doncaster, Wakefield, and Leeds. The larger towns of Rotherham and Huddersfield are nearby. Barnsley's former industries include linen, coal mining, glassmaking and textiles. These declined in the 20th century, but Barnsley's culture is rooted in its industrial heritage and it has a tradition of brass bands, originally created as social clubs by its mining communities. The town is near to the M1 motorway and is served by Barnsley Interchange railway station on the Hallam and Penistone Lines. Barnsley has competed in the second tier of En ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar Eclipse
A lunar eclipse occurs when the Moon moves into the Earth's shadow. Such alignment occurs during an eclipse season, approximately every six months, during the full moon phase, when the Moon's orbital plane is closest to the plane of the Earth's orbit. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned (in syzygy) with Earth between the other two, which can happen only on the night of a full moon when the Moon is near either lunar node. The type and length of a lunar eclipse depend on the Moon's proximity to the lunar node. When the moon is totally eclipsed by the Earth, it takes on a reddish color that is caused by the planet when it completely blocks direct sunlight from reaching the Moon surface, as only the light reflected from the lunar surface has been refracted by Earth's atmosphere. This light appears reddish due to the Rayleigh scattering of blue light, the same reason sunrise and sunsets are more orange than during the day. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteor Shower
A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories. Most meteors are smaller than a grain of sand, so almost all of them disintegrate and never hit the Earth's surface. Very intense or unusual meteor showers are known as meteor outbursts and meteor storms, which produce at least 1,000 meteors an hour, most notably from the Leonids. The Meteor Data Centre lists over 900 suspected meteor showers of which about 100 are well established. Several organizations point to viewing opportunities on the Internet. NASA maintains a daily map of active meteor showers. Historical developments A meteor shower in August 1583 was recorded in the Timbuktu manuscripts.Abraham, Curtis"Stars of the Sahara" ''New Scientist'', issue 2617,15 August 2007, page 39–41 I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vixen (telescopes)
Vixen is a Japanese company that makes telescopes, binoculars, spotting scopes and accessories for their products. Among many other more mainstream products they have created two unusual varieties of catadioptric telescopes with an open tube design instead of the full-aperture corrector plate of the Schmidt–Cassegrain and most Maksutov–Cassegrain designs. Klevtsov–Cassegrain This design is based on the Maksutov–Cassegrain. It provides correction of aberrations via a two-element meniscus-shaped corrector lens in front of the secondary mirror. This design was originally envisaged by G. I. Popov with a practical implementation by Yu. A. Klevtsov. It is produced with apertures of 8, 10.25 and 13 inches. The 8-inch model employs a refractor style rack and pinion focuser, while in the larger designs the primary mirror is moved as in most other small to medium-sized Cassegrain designs. Vixen Sixth-Order Aspheric Cassegrain (VISAC) Vixen produces an 8-inch aperture-mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
