This article is about astrophysics. For the measure in cycling, see Arthur Eddington § Eddington number for cycling.
Arthur Stanley Eddington (1882–1944)
In astrophysics, the Eddington number, NEdd, is the number of protons in the observable universe. Eddington originally calculated it as about 1.57×1079; current estimates make it approximately 1080.
The term is named for British astrophysicist Arthur Eddington, who in 1940 was the first to propose a value of NEdd and to explain why this number might be important for physical cosmology and the foundations of physics.
In astrophysics, the Eddingtonnumber, NEdd, is the number of protons in the observable universe. Eddington originally calculated it as about 1.57×1079;...
complete mystery; Eddington was the first to correctly speculate that the source was fusion of hydrogen into helium. Eddington wrote a number of articles that...
Eddington or Edington may refer to: Eddington Varmah, Liberian politician Eddington (surname), people with the surname Eddington, Victoria Eddington, Berkshire...
coincidence was further developed by Arthur Eddington (1931) who related the above ratios to N, the estimated number of charged particles in the universe[clarification...
Sagan pointed out that the total number of elementary particles in the universe is around 1080 (the Eddingtonnumber) and that if the whole universe were...
The Eddington experiment was an observational test of general relativity, organised by the British astronomers Frank Watson Dyson and Arthur Stanley Eddington...
Paul Clark Eddington CBE (18 June 1927 – 4 November 1995) was an English actor best known for playing Jerry Leadbetter in the television sitcom The Good...
constant, ke ) – Charles-Augustin de Coulomb Eddingtonnumber – Arthur Stanley Eddington Dunbar's number – Robin Dunbar Embree–Trefethen constant Erdős–Borwein...
The result is approximately 1080 hydrogen atoms, also known as the Eddingtonnumber. The mass of the observable universe is often quoted as 1053 kg. In...
universe.[citation needed] The number of protons in the observable universe is called the Eddingtonnumber. In terms of number of particles, some estimates...
Eddington (1929) to construct an argument why its value might be 1/137 precisely, which related to the Eddingtonnumber, his estimate of the number of...
is what it is, a primary quantity, while the proton's mass is the tiny number 1/13 quintillion. While it is true that the electrostatic repulsive force...
Stanley Eddington. These numerical coincidences refer to such quantities as the ratio of the age of the universe to the atomic unit of time, the number of...
Chandrasekhar became acquainted with British physicist Sir Arthur Eddington. Eddington took an interest in his work, but in January, 1935, gave a talk severely...
1919: this total eclipse was photographed by Arthur Eddington to verify general relativity (see Eddington experiment) 20 June 1955: longest total eclipse...
controversy, owing to the opposition of the British astrophysicist Arthur Eddington. Eddington was aware that the existence of black holes was theoretically possible...
British astrophysicist Arthur Eddington, and is an unsolved general physics question. This direction, according to Eddington, could be determined by studying...
Chow George Coulouris Rosalie Crutchley Finlay Currie Hilary Dwyer Paul Eddington Mark Eden Max Faulkner Ian Fleming Valerie French Nadia Gray Lucy Griffiths...
simians and typewriters. In the early 20th century, Borel and Arthur Eddington used the theorem to illustrate the timescales implicit in the foundations...
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