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48 relations: Andromeda (constellation), Apparent magnitude, Artemis 81, Atomic number, BBC, Centered octagonal number, Constellation, Departments of France, Generalizations of Fibonacci numbers, Harshad number, Hells Angels, Heptagonal number, India, International Standard Book Number, Japan, List of country calling codes, List of highways numbered 81, M81 Group, Meander (mathematics), Messier 81, Messier object, Mian–Chowla sequence, Natural number, New General Catalogue, NGC 81, Palindromic number, People's Liberation Army, Perfect totient number, Repeating decimal, Shogi, Short film, Spiral galaxy, Square number, Tao Te Ching, Tarn (department), Thallium, The New York Times, Turkey, Ursa Major, ZX81, 1458 (number), 1729 (number), 1981, 3, 80 (number), 81 BC, 82 (number), 9.
Andromeda (constellation)
Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations.
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Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
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Artemis 81
Artemis 81 is a British television play which was written by David Rudkin and directed by Alastair Reid.
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Atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.
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BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster.
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Centered octagonal number
A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.
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Constellation
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Departments of France
In the administrative divisions of France, the department (département) is one of the three levels of government below the national level ("territorial collectivities"), between the administrative regions and the commune.
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Generalizations of Fibonacci numbers
In mathematics, the Fibonacci numbers form a sequence defined recursively by: That is, after two starting values, each number is the sum of the two preceding numbers.
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Harshad number
In recreational mathematics, a harshad number (or Niven number) in a given number base, is an integer that is divisible by the sum of its digits when written in that base.
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Hells Angels
The Hells Angels Motorcycle Club (HAMC) is a worldwide one-percenter motorcycle club whose members typically ride Harley-Davidson motorcycles.
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Heptagonal number
A heptagonal number is a figurate number that represents a heptagon.
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India
India (IAST), also called the Republic of India (IAST), is a country in South Asia.
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International Standard Book Number
The International Standard Book Number (ISBN) is a unique numeric commercial book identifier.
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Japan
Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.
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List of country calling codes
Country calling codes or country dial in codes are telephone dialing prefixes for the member countries or regions of the International Telecommunication Union (ITU).
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List of highways numbered 81
Route 81 or Highway 81 may refer to.
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M81 Group
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses.
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Meander (mathematics)
In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times.
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Messier 81
Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a spiral galaxy about 12 million light-years away, in the constellation Ursa Major.
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Messier object
The Messier objects are a set of 110 astronomical objects, of which 103 were included in lists published by French astronomer Charles Messier in 1771 and 1781.
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Mian–Chowla sequence
In mathematics, the Mian–Chowla sequence is an integer sequence defined recursively in the following way.
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Natural number
In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country").
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New General Catalogue
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888.
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NGC 81
NGC 81 is a lenticular galaxy estimated to be about 270 million light-years away in the constellation of Andromeda.
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Palindromic number
A palindromic number or numeral palindrome is a number that remains the same when its digits are reversed.
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People's Liberation Army
The Chinese People's Liberation Army (PLA) is the armed forces of the People's Republic of China (PRC) and Communist Party of China (CPC).
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Perfect totient number
In number theory, a perfect totient number is an integer that is equal to the sum of its iterated totients.
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Repeating decimal
A repeating or recurring decimal is decimal representation of a number whose digits are periodic (repeating its values at regular intervals) and the infinitely-repeated portion is not zero.
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Shogi
(), also known as Japanese chess or the Game of Generals, is a two-player strategy board game in the same family as chess, chaturanga, makruk, shatranj, janggi and xiangqi, and is the most popular of a family of chess variants native to Japan.
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Short film
A short film is any motion picture not long enough to be considered a feature film.
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Spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, form part of the Hubble sequence.
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Square number
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.
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Tao Te Ching
The Tao Te Ching, also known by its pinyin romanization Daodejing or Dao De Jing, is a Chinese classic text traditionally credited to the 6th-century BC sage Laozi.
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Tarn (department)
Tarn is a French department located in the Occitanie region in the southwest of France named after the Tarn river.
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Thallium
Thallium is a chemical element with symbol Tl and atomic number 81.
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The New York Times
The New York Times (sometimes abbreviated as The NYT or The Times) is an American newspaper based in New York City with worldwide influence and readership.
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Turkey
Turkey (Türkiye), officially the Republic of Turkey (Türkiye Cumhuriyeti), is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe.
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Ursa Major
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
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ZX81
The ZX81 is a home computer that was produced by Sinclair Research and manufactured in Dundee, Scotland by Timex Corporation.
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1458 (number)
1458 is the integer after 1457 and before 1459.
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1729 (number)
1729 is the natural number following 1728 and preceding 1730.
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1981
No description.
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3
3 (three) is a number, numeral, and glyph.
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80 (number)
80 (eighty) is the natural number following 79 and preceding 81.
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81 BC
Year 81 BC was a year of the pre-Julian Roman calendar.
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82 (number)
82 (eighty-two) is the natural number following 81 and preceding 83.
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9
9 (nine) is the natural number following and preceding.
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References
[1] https://en.wikipedia.org/wiki/81_(number)
