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Herrett Center For Arts And Science
The Herrett Center for Arts and Science, located on the main campus of the College of Southern Idaho in Twin Falls, Idaho, United States, is a museum of anthropology, natural history, astronomy, and art. The museum's collections primarily comprise anthropological artifacts and natural history specimens from the Americas, as well as works of local artists. The Center also houses the Faulkner Planetarium, the Centennial Observatory, a museum store, and a 2900 square foot (269 square meter) multi-purpose event space. Museum Galleries The museum exhibits a variety of anthropological artifacts, ethnographic items, and natural history specimens, primarily from the Americas. Notable among them is the Simon Clovis cache of over thirty stone bifaces found in Idaho in 1961, and a replica of the Huntington Canyon Mammoth, a nearly-complete Columbian mammoth skeleton unearthed in Utah in 1988. The Jean B. King Gallery of Art offers several exhibits per year, including annual student ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twin Falls, ID
Twin Falls is the county seat and largest city of Twin Falls County, Idaho, United States. The city had a population of 51,807 as of the 2020 census. In the Magic Valley region, Twin Falls is the largest city in a radius, and is the regional commercial center for south-central Idaho and northeastern It is the principal city of the Twin Falls Metropolitan Statistical Area, which officially includes the entirety of Twin Falls and Jerome The border town resort community of Jackpot, Nevada, south at the state line, is unofficially considered part of the greater Located on a broad plain at the south rim of the Snake River Canyon, Twin Falls is where daredevil Evel Knievel attempted to jump across the canyon in 1974 on a steam-powered rocket. The jump site is northeast of central Twin Falls, midway between Shoshone Falls and the Perrine Bridge. History Excavations at Wilson Butte Cave near Twin Falls in 1959 revealed evidence of human activity, including arrowheads, that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slide Projector
A slide projector is an opto-mechanical device for showing photographic slides. 35 mm slide projectors, direct descendants of the larger-format magic lantern, first came into widespread use during the 1950s as a form of occasional home entertainment; family members and friends would gather to view slide shows. Reversal film was much in use, and supplied slides snapped during vacations and at family events. Slide projectors were also widely used in educational and other institutional settings. Photographic film slides and projectors have mostly been replaced by image files on digital storage media shown on a projection screen by using a video projector or simply displayed on a large-screen video monitor. History A continuous-slide lantern was patented in 1881. It included a dissolving views apparatus.Sloane, T. O'Conor. ''Facts Worth Knowing Selected Mainly from the Scientific American for Household, Workshop, and Farm Embracing Practical and Useful Informat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Planetariums
This entry is a list of permanent planetariums across the world, including software and manufacturers. In addition, many mobile planetariums exist, touring venues such as schools. Permanent planetariums The planetariums here are listed in the following format: ''name'', ''website'' (if available), ''city''. The International Planetarium Society has a much more complete list at its website. Africa Algeria * Complexe Culturel Abdelwahab Salim, Tipaza * Planetarium de Ghardaia, Ghardaia Egypt * Arab Academy for Science and Technology Planetarium, Alexandria * The Child Museum, Cairo * Planetarium Science Center, Alexandria * Suez Discovery & Science Center, Suez Ghana * Ghana Planetarium, Accra South Africa * Iziko Planetarium at the Iziko South African Museum, Cape Town * Johannesburg Planetarium at University of the Witwatersrand, Johannesburg * Sutherland Planetarium Tunisia * Planetarium of Tunis Science City, Tunis Asia Bangladesh * Bangabandhu Sheikh Mujibur Rahm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Astronomical Societies
A list of notable groups devoted to promoting astronomy research and education. Africa *African Astronomical Society South Africa * Astronomical Society of Southern Africa Asia China *Chinese Astronomical Society India *Akash Mitra Mandal *Astronomical Society of India * Bangalore Astronomical Society (BAS) *Confederation of Indian Amateur Astronomers * IUCAA *Jyotirvidya Parisanstha * Khagol Mandal * Khagol Vishwa Europe * European Astronomical Society * European Association for Astronomy Education France * Société astronomique de France * Société Française d'Astronomie et d'Astrophysique (SF2A) Germany * Astronomische Gesellschaft Greece * Hellenic Astronomical Society Ireland *Irish Astronomical Society *Irish Federation of Astronomical Societies Italy * Unione Astrofili Italiani Norway * Norwegian Astronomical Society Poland * Polish Astronomical Society Serbia * Astronomical Society Ruđer Bošković Turkey * Spaceturk United Kingdom * Airdrie Astronomic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Astronomical Observatories
This is a list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location. The list also includes a final year of operation for many observatories that are no longer in operation. While other sciences, such as volcanology and meteorology, also use facilities called observatories for research and observations, this list is limited to observatories that are used to observe celestial objects. Astronomical observatories are mainly divided into four categories: space-based, airborne, ground-based, and underground-based. Many modern telescopes and observatories are located in space to observe astronomical objects in wavelengths of the electromagnetic spectrum that cannot penetrate the Earth's atmosphere (such as ultraviolet radiation, X-rays, and gamma rays) and are thus impossible to observe using ground-based telescopes. Being above the atmosphere, these space observatories can also avoid the effect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maksutov Telescope
The Maksutov (also called a "Mak") is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly "spherically symmetrical". The negative lens is usually full diameter and placed at the entrance pupil of the telescope (commonly called a "corrector plate" or "meniscus corrector shell"). The design corrects the problems of off-axis aberrations such as coma found in reflecting telescopes while also correcting chromatic aberration. It was patented in 1941 by Russian optician Dmitri Dmitrievich Maksutov. Maksutov based his design on the idea behind the Schmidt camera of using the spherical errors of a negative lens to correct the opposite errors in a spherical primary mirror. The design is most commonly seen in a Cassegrain variation, with an integrated secondary, that can use all-spherical elements, thereby simplifying fabrication. Maksutov telescopes have been sold on the ama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newtonian Telescope
The Newtonian telescope, also called the Newtonian reflector or just a Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton, using a concave primary mirror and a flat diagonal secondary mirror. Newton's first reflecting telescope was completed in 1668 and is the earliest known functional reflecting telescope. The Newtonian telescope's simple design has made it very popular with amateur telescope makers. Description 
A Newtonian telescope is composed of a primary mirror or objective, usually parabolic in shape, and a smaller mirror called the "secondary" which is flat. ...
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DFM Engineering
DFM Engineering is an American telescope and optics manufacturer founded in 1979 by Frank Melsheimer in Longmont, Colorado. DFM makes medium size Cassegrain telescopes and their associated systems including telescope optics, control systems, and mounts. A range of pre-designed telescopes are made, as are various custom installations. DFM produces its classical Cassegrain design in various apertures from 16 inches (0.4 m) to 50 inches (1.3 m) and larger. The base DFM 16-inch (40 cm) telescope system cost roughly 94 thousand USD in 2005. DFM produced a 1.6 m solar telescope for the Big Bear Solar Observatory. The United States Navy purchased a 1.3 m (51-inch) DFM telescope for the United States Naval Observatory Flagstaff Station in Arizona, USA. DFM installations include many universities and institutions, including: Alfred University, Appalachian State University Appalachian State University (; Appalachian, App State, App, or ASU) is a pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equatorial Mount
An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, the polar axis, parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras. The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any celestial object with diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal or clock drive. Equatorial mounts achieve this by aligning their rotational axis with the Earth, a process known as polar alignment. Astronomical telescope mounts In astronomical telescope mounts, the equatorial axis (the ''right ascension'') is paired with a second perpendicular axis of motion (known as the ''declination''). The equatorial axis of the mount is often equipped with a motorized "'' clock drive''", that rotates that axis one revolution every 23 hours and 56 minutes in exact sync with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchey–Chrétien Telescope
A Ritchey–Chrétien telescope (RCT or simply RC) is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary mirror designed to eliminate off-axis optical errors (coma). The RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration. Since the mid 20th century, a majority of large professional research telescopes have been Ritchey–Chrétien configurations; some well-known examples are the Hubble Space Telescope, the Keck telescopes and the ESO Very Large Telescope. History The Ritchey–Chrétien telescope was invented in the early 1910s by American astronomer George Willis Ritchey and French astronomer Henri Chrétien. Ritchey constructed the first successful RCT, which had an aperture diameter of in 1927 (e.g. Ritchey 24-inch reflector). The second RCT was a instrument constructed by Ritchey for the United States Naval Observatory; that telescope is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescope
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally meaning only an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, the word ''telescope'' now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. Etymology The word ''telescope'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handicapped-accessible
Accessibility is the design of products, devices, services, vehicles, or environments so as to be usable by people with disabilities. The concept of accessible design and practice of accessible development ensures both "direct access" (i.e. unassisted) and "indirect access" meaning compatibility with a person's assistive technology (for example, computer screen readers). Accessibility can be viewed as the "ability to access" and benefit from some system or entity. The concept focuses on enabling access for people with disabilities, or enabling access through the use of assistive technology; however, research and development in accessibility brings benefits to everyone. Accessibility is not to be confused with usability, which is the extent to which a product (such as a device, service, or environment) can be used by specified users to achieve specified goals with effectiveness, efficiency, convenience, or satisfaction in a specified context of use. Accessibility is also s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
