Aitken (other)
Aitken may refer to: * Aitken (crater), a crater on the Moon, named after Robert Grant Aitken (1864–1951), an American astronomer * South Pole–Aitken basin, an immense impact crater on the far side of the Moon. At roughly in diameter and deep, it is one of the largest known impact craters in the Solar System. It is the largest, oldest, and deepest basin recognized on the Moon; named for two features on opposite sides of the basin: the crater Aitken on the northern end and the lunar south pole at the other end. * Aitken's delta-squared process * Aitken (surname), people with the surname ''Aitken'' See also * Aitkin (other) * Adkins Adkins is a surname of English origin. Notable people with the surname include: *Adele Adkins (born 1988), British singer * Amanda Adkins (born 1974/1975), American politician and businesswoman * Amanda Adkins (born 1976), American swimmer * Bennie ...

Aitken (crater)
Aitken is a large lunar crater, lunar impact crater that lies on the Far side (Moon), far side of the Moon, named for Robert Grant Aitken, an American astronomer specializing in binary stellar systems. It is located to the southeast of the crater Heaviside (lunar crater), Heaviside, and north of the unusual formation Van de Graaff (crater), Van de Graaff. Attached to the southwest rim is Vertregt (crater), Vertregt. To the southeast is the smaller Bergstrand (crater), Bergstrand. The inner wall of Aitken is Wiktionary: terrace, terraced and varies notably in width with the narrowest portion in the southwest. The crater Aitken  Z lies across the inner north wall. Just to the north of the rim is the small crater Aitken which is surrounded by an ejecta blanket of lighter-albedo material. The interior floor has been resurfaced in the past by a darker lava flow, especially in the southern half. There are also several small crater impacts on the eastern floor, an arcing central ...
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Robert Grant Aitken
Robert Grant Aitken (December 31, 1864 – October 29, 1951) was an American astronomer. Early life and education Robert Grant Aitken was born in Jackson, California, to Scottish immigrant Robert Aitken and Wilhelmina Depinau. Aitken attended Williams College in Massachusetts and graduated with an undergraduate degree in 1887. Career From 1887–1891, he worked as a mathematics instructor at Livermore, California, then received his M.A. from Williams College in 1892. He became a professor of mathematics at the College of the Pacific, another liberal arts school. He was offered an assistant astronomer position at Lick Observatory in California in 1895. He began a systematically study of double stars, measuring their positions and calculating their orbits around one another. From 1899, in collaboration with W. J. Hussey, he methodically created a very large catalog of such stars. This ongoing work was published in Lick Observatory bulletins. In 1905, Hussey left and Aitk ...
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South Pole–Aitken Basin
The South Pole–Aitken basin (SPA Basin, ) is an immense impact crater on the far side of the Moon. At roughly in diameter and between deep, it is one of the largest known impact craters in the Solar System. It is the largest, oldest, and deepest basin recognized on the Moon. It is estimated that it was formed 4.2 to 4.3 billion years ago, during the Pre-Nectarian epoch. It was named for two features on opposite sides of the basin: the lunar South Pole at one end and the crater Aitken on the northern end. The outer rim of this basin can be seen from Earth as a huge mountain chain located on the Moon's southern limb, sometimes informally called "Leibnitz mountains". On 3 January 2019, the Chang'e 4, a Chinese spacecraft, landed in the basin, specifically within a crater called Von Kármán.
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Aitken's Delta-squared Process
In numerical analysis, Aitken's delta-squared process or Aitken extrapolation is a series acceleration method, used for accelerating the rate of convergence of a sequence. It is named after Alexander Aitken, who introduced this method in 1926.Alexander Aitken, "On Bernoulli's numerical solution of algebraic equations", ''Proceedings of the Royal Society of Edinburgh'' (1926) 46 pp. 289–305. Its early form was known to Seki Kōwa (end of 17th century) and was found for rectification of the circle, i.e. the calculation of π. It is most useful for accelerating the convergence of a sequence that is converging linearly. Definition Given a sequence X = _, one associates with this sequence the new sequence :A X=_, which can, with improved numerical stability, also be written as : (A X)_n = x_n-\frac, or equivalently as :(A X)_n = x_ - \frac = x_ - \frac where :\Delta x_=,\ \Delta x_=, and :\Delta^2 x_n=x_n -2x_ + x_=\Delta x_-\Delta x_,\ for n = 0, 1, 2, 3, \dots \, Obviou ...
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Aitken (surname)
The surname Aitken is derived from the Lowland Scots personal name ''Aitken'', which is in turn a form of the name '' Adam''. At the time of the British Census of 1881, Retrieved 25 January 2014 its frequency was highest in Peeblesshire (23.6 times the British average), followed by Linlithgowshire, Haddingtonshire, Stirlingshire, Fife, Dunbartonshire, Clackmannanshire, Shetland, Edinburghshire and Ayrshire. The name Aitken may refer to: * Abbi Aitken-Drummond (born 1991), Scottish cricketer * A.J. Aitken, Scottish lexicographer * Alexander Aitken, New Zealand mathematician * Andrew Aitken, one of several people including ** Andrew Aitken (footballer, born 1909), (1909–1984), English footballer ** Andrew Peebles Aitken (1843–1904), Scottish agricultural chemist ** Andy Aitken (footballer, born 1877) (1877–1955), Scottish footballer * Anne Hopkins Aitken (1911–1994), American Buddhist * Aubrey Aitken (1911–1985), second Bishop of Lynn, 1972–1986 * Bill Aitken, ...
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Aitkin (other)
Aitkin may refer to: Place names In the United States: *Aitkin County, Minnesota **Aitkin, Minnesota, a city in the county **Aitkin Township, Aitkin County, Minnesota, a township in the county **Aitkin High School, Aitkin, Minnesota People with the surname * Alexander Aitkin, mathematician and first surveyor general of Upper Canada * Don Aitkin, Australian political scientist See also * Aitken (other), includes "Aitkens" * Adkins Adkins is a surname of English origin. Notable people with the surname include: *Adele Adkins (born 1988), British singer * Amanda Adkins (born 1974/1975), American politician and businesswoman * Amanda Adkins (born 1976), American swimmer * Bennie ...