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Thai National Observatory
Thai National Observatory (TNO) is in Doi Inthanon National Park, Chom Thong District, Chiang Mai Province, Thailand A top Thailand's highest mountain, Doi Inthanon, this observatory is part of the National Astronomical Research Institute of Thailand, and is its main facility. Facilities The TNO has of two sections—the main observatory, and an auxiliary station lower on the mountain with offices and lodging for astronomers, facilities for public outreach activities (like school groups), and a small permanent exhibition for the public. Because the observatory is located in a national park, it was built to minimize environmental impact. Equipment * 2.4-meter reflecting Ritchey–Chrétien telescope with altazimuth mount, known as the Thai National Telescope (TNT). The telescope control system also controls movement of the dome automatically. The telescope itself was manufactured in Tucson, Arizona at EOS Technologies, Inc. (EOST). The primary mirror was fabricated and polishe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doi Inthanon National Park
Doi Inthanon National Park ( th, อุทยานแห่งชาติดอยอินทนนท์), nicknamed "the roof of Thailand", is in the Thanon Thong Chai Range, Chom Thong District, Chiang Mai Province, northern Thailand. It includes Doi Inthanon, the country's highest mountain. It contains an area of 301,184 rai ~ in size. It was established on October 2, 1972.http://www.ratchakitcha.soc.go.th/DATA/PDF/2515/A/148/5.PDF Geography The park is approximately from Chiang Mai. It includes Karen and Meo Hmong villages of about 4,500 people. Its elevation ranges between . Within its borders are a number of waterfalls: Mae Klang Falls, Wachiratan Falls, Siriphum Falls, and Mae Ya Falls. The park has varied climatic and ecologically different sections. Flora Flora includes evergreen cloud forest, sphagnum bog, and deciduous dipterocarp forest. There are some relict pines. Plant communities of Doi Inthanon vary according to elevation. Below is a table of main p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chom Thong District, Chiang Mai Province
Chom Thong District, Chiang Mai ( th, จอมทอง, ) is a district ('' amphoe'') in the southern part of Chiang Mai province in northern Thailand. History According to the legend of ''Wat'' Phra That Si Chom Thong Worawihan, the temple is on a small hill which looks similar to a termite hill (''chom pluak'' in Thai). The hill is covered by ''thong kwao'' or Bastard teak ('' Butea monosperma'') and ''Thong Lang'' or coral tree (''Erythrina variegata'') forest. Thus the people called the hill Chom Thong. After Buddha entered parinirvana, King Asoka the Great visited the hill to place Buddha's relics there. The temple was built on the hill and named Wat Phra That Chom Thong in 1451. Later the temple was upgraded to be royal temple and at the same time renamed Wat Phra That Si Chom Thong Worawihan. The government created a district in the area in 1900 and named the new district Chom Thong following the legend. The district office was originally in Ban Tha Sala, Tambon Khuang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiang Mai Province
Chiang Mai ( th, เชียงใหม่, ; nod, , ) is the largest Province (''changwat'') of Thailand. It lies in upper northern Thailand and has a population of 1.78 million people. It is bordered by Chiang Rai to the northeast, Lampang and Lamphun to the south, Tak to the southwest, Mae Hong Son to the west, and Shan State of Burma to the north. The capital, Chiang Mai, is north of Bangkok. Geography Chiang Mai province is about from Bangkok in the Mae Ping River basin and is on average at elevation. Surrounded by the mountain ranges of the Thai highlands, it covers an area of approximately . The mountains of the Daen Lao Range () at the north end of the province, the Thanon Thong Chai Range () with the highest mountain in Thailand, Doi Inthanon at , stretching in a north–south direction, and the Khun Tan Range in the east of the province are covered by rain forest. The Mae Ping, one of the major tributaries of the Chao Phraya River, originates in the Daen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doi Inthanon
Doi Inthanon ( th, ดอยอินทนนท์, ) is the highest mountain in Thailand. It is in Chom Thong District, Chiang Mai Province. This mountain is an ultra prominent peak, known in the past as ''Doi Luang'' ('big mountain') or ''Doi Ang Ga'', meaning the 'crow's pond top'. Near the mountain's base was a pond where many crows gathered. The name ''Doi Inthanon'' was given in honour of Inthawichayanon, last King of Chiang Mai, who was concerned about the forests in the north and tried to preserve them. He ordered that, after his death, his remains be interred at Doi Luang, which was then renamed in his honour. Today, the summit of Doi Inthanon is a popular tourist destination for both foreign and Thai tourists, with a peak of 12,000 visitors visiting the summit on New Year's Day. In addition to a range of tourist facilities on the summit, there is also a Royal Thai Air Force weather radar station at the summit and the Thai National Observatory (TNO) at km44. Geogra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Astronomical Research Institute Of Thailand
National Astronomical Research Institute of Thailand or NARIT is a research institute under the Ministry of Higher Education, Science, Research and Innovation. Its main missions are to carry out, support, and promote the development of astronomy and astrophysics in Thailand through research, public outreach, and educational activities. NARIT was first established in 2004 as NARI (National Astronomical Research Institute), a statutory government institute under the Ministry of Science and Technology, to commemorate Bhumibol Adulyadej's 80th birthday. On 27 December 2008, the status of NARIT was changed to a non-profit governmental public organization. The Thai National Observatory (TNO) is NARIT's main facility, atop Thailand's highest mountain, Doi Inthanon in Doi Inthanon National Park, Chom Thong District, Chiang Mai Province. In 2020, NARIT completed the construction of the Thai National Radio Telescope (TNRO), a 40m single-dish short-millimeter telescope in Huai Hong Kh ... [...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 st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altazimuth Mount
An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument. Rotation about the horizontal axis varies the altitude angle (angle of elevation) of the pointing direction. These mounts are used, for example, with telescopes, cameras, radio antennas, heliostat mirrors, solar panels, and guns and similar weapons. Several names are given to this kind of mount, including altitude-azimuth, azimuth-elevation and various abbreviations thereof. A gun turret is essentially an alt-azimuth mount for a gun, and a standard camera tripod is an alt-azimuth mount as well. Astronomical telescope altazimuth mounts When used as an astronomical telescope mount, the biggest advantage of an alt-azimuth mount is the simplicity of its mechanical design. The primary disadv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sirius Seen From The Thai National Observatory (16008163949)
Sirius is the brightest star in the night sky. Its name is derived from the Greek word , or , meaning 'glowing' or 'scorching'. The star is designated α Canis Majoris, Latinized to Alpha Canis Majoris, and abbreviated Alpha CMa or α CMa. With a visual apparent magnitude of −1.46, Sirius is almost twice as bright as Canopus, the next brightest star. Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as they orbit every 50 years. Sirius appears bright because of its intrinsic luminosity and its proximity to the Solar System. At a distance of , the Sirius system is one of Earth's nearest neighbours. Sirius is gradually moving closer to the Solar System, so it is expected to increase in brightness slightly over the next 60,000 years, reaching a peak magnitude of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echelle Grating
An echelle grating (from French ''échelle'', meaning "ladder") is a type of diffraction grating characterised by a relatively low groove density, but a groove shape which is optimized for use at high incidence angles and therefore in high diffraction orders. Higher diffraction orders allow for increased dispersion (spacing) of spectral features at the detector, enabling increased differentiation of these features. Echelle gratings are, like other types of diffraction gratings, used in spectrometers and similar instruments. They are most useful in cross-dispersed high resolution spectrographs, such as HARPS, PARAS, and numerous other astronomical instruments. History The concept of a coarsely-ruled grating used at grazing angles was discovered by Albert Michelson in 1898, where he referred to it as an "echelon". However, it was not until 1923 that echelle spectrometers began to take on their characteristic form, in which the high-resolution grating is used in tandem with a cro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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