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Ritchey Chretien
Ritchey may refer to: Places * Ritchey, California * Ritchey, Missouri People * George Willis Ritchey (1864–1945), American optician, telescope maker and astronomer * Tom Ritchey (born 1956), bike designer Other uses * Ritchey (lunar crater) * Ritchey (Martian crater) Ritchey is a crater on Mars, located in the Coprates quadrangle at 28.8° South and 51° West. It measures 79 kilometers in diameter and was named after George W. Ritchey, an American astronomer (1864–1945). Ritchey lies south of Valles Mari ... * Ritchey Design {{disambig, geo, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchey, Missouri
Ritchey is a village in Newton County, Missouri, United States. The population was 82 at the 2010 census. It is part of the Joplin, Missouri Metropolitan Statistical Area. History Ritchey was originally called Richville, and under the latter name was platted in 1870. The community was named for its founder, Matthew H. Ritchey, who had settled there in 1832. A post office called Ritchey was established in 1871, and remained in operation until 1974. Geography Ritchey is located at (36.943808, -94.185889). According to the United States Census Bureau, the village has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 82 people, 32 households, and 22 families living in the village. The population density was . There were 38 housing units at an average density of . The racial makeup of the village was 96.3% White, 2.4% Native American, and 1.2% from two or more races. There were 32 households, of which 34.4% had children under the age of 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Willis Ritchey
George Willis Ritchey (December 31, 1864 – November 4, 1945) was an American optician and telescope maker and astronomer born at Tuppers Plains, Ohio. Ritchey was educated as a furniture maker. He coinvented the Ritchey–Chrétien (R–C) reflecting telescope along with Henri Chrétien. The R-C prescription remains the predominant optical design for telescopes and has since been used for the majority of major ground-based and space-based telescopes. He worked closely with George Ellery Hale, first at Yerkes Observatory and later at Mt. Wilson Observatory. He played a major role in designing the mountings and making the mirrors of the Mt. Wilson and telescopes. Hale and Ritchey had a falling out in 1919, and Ritchey eventually went to Paris where he promoted the construction of very large telescopes. He returned to America in 1930 and obtained a contract to build a Ritchey-Chrétien telescope for the U.S. Naval Observatory. This last telescope produced by Ritchey rem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tom Ritchey
Tom Ritchey (born 1956) is an American bicycle frame builder, Category 1 racer, fabricator, designer, and founder of Ritchey Design. Ritchey is a US pioneer in modern frame building and the first production mountain bike builder/manufacturer in the history of the sport. He is an innovator of bicycle components that have been used in winning some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics. In 1988, Ritchey was inducted into the inaugural Mountain Bike Hall of Fame in Crested Butte, Colorado (now located in Fairfax, California): and 2012, inducted to the United States Bicycle Hall of Fame in Davis, California. Early years Tom Ritchey moved to Menlo Park, California, from Cherry Hill, New Jersey, in 1963, when his father was hired as an engineer at Ampex Corporation, an electronics company located in Redwood City, California, pioneered the magnetic tape recorder. Ritchey attributes his interest in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchey (lunar Crater)
Ritchey is a small lunar impact crater named after the American astronomer George Willis Ritchey. The crater is situated to the east of Albategnius Abū ʿAbd Allāh Muḥammad ibn Jābir ibn Sinān al-Raqqī al-Ḥarrānī aṣ-Ṣābiʾ al-Battānī ( ar, محمد بن جابر بن سنان البتاني) ( Latinized as Albategnius, Albategni or Albatenius) (c. 858 – 929) was an astron ... in the central lunar highlands. Its somewhat angular rim is broken along the northwestern wall by a pair of smaller, adjacent craters. The floor of Ritchey is fairly flat, with a pair of small central mounds. Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the satellite midpoint that is closest to Ritchey. References * * * * * * * * * * * External links Albategnius at The Moon Wiki [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchey (Martian Crater)
Ritchey is a crater on Mars, located in the Coprates quadrangle at 28.8° South and 51° West. It measures 79 kilometers in diameter and was named after George W. Ritchey, an American astronomer (1864–1945). Ritchey lies south of Valles Marineris and north of Argyre Planitia, a large impact crater. There is strong evidence that it was once a lake.Sun, V., R. Milliken. 2014. The geology and mineralogy of Ritchey crater, Mars: Evidence for post-Noachian clay formation. Journal of Geophysical Research:119(4), 810–836Alluvial/Fluvial & Lacustrine Deposits in Ritchey Crater marsoweb.nas.nasa.gov Retrieved May 11, 2023 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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