Arthur Stanley Eddington
Overview
Sir Arthur Stanley Eddington, OM, FRS
Royal Society
The Royal Society of London for Improving Natural Knowledge, known simply as the Royal Society, is a learned society for science, and is possibly the oldest such society in existence. Founded in November 1660, it was granted a Royal Charter by King Charles II as the "Royal Society of London"...

 (28 December 1882 – 22 November 1944) was a British astrophysicist of the early 20th century. He was also a philosopher of science
Philosophy of science
The philosophy of science is concerned with the assumptions, foundations, methods and implications of science. It is also concerned with the use and merit of science and sometimes overlaps metaphysics and epistemology by exploring whether scientific results are actually a study of truth...

 and a popularizer of science. The Eddington limit, the natural limit to the luminosity
Luminosity
Luminosity is a measurement of brightness.-In photometry and color imaging:In photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI unit for luminance is candela per square metre.The luminosity function...

 of stars, or the radiation generated by accretion onto a compact object, is named in his honour.

He is famous for his work regarding the Theory of Relativity
Theory of relativity
The theory of relativity, or simply relativity, encompasses two theories of Albert Einstein: special relativity and general relativity. However, the word relativity is sometimes used in reference to Galilean invariance....

. Eddington wrote a number of articles which announced and explained Einstein's
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

 theory of general relativity
General relativity
General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics...

 to the English-speaking world.
Quotations

We have found a strange footprint on the shores of the unknown. We have devised profound theories, one after another, to account for its origins. At last, we have succeeded in reconstructing the creature that made the footprint. And lo! It is our own.

Space, Time and Gravitation (1920)

Physics has in the main contented itself with studying the abridged edition of the book of nature.

"A Generalization of Weyl's Theory of the Electromagnetic and Gravitational Fields" in Proceedings of the Royal Society of London A99 (1921), p. 108

I think that science would never have achieved much progress if it had always imagined unknown obstacles hidden round every corner. At least we may peer gingerly round the corner, and perhaps we shall find there is nothing very formidable after all.

Stars and Atoms (1927); lecture 1

There once was a brainy baboon,Who always breathed down a bassoon,For he said, "It appearsThat in billions of yearsI shall certainly hit on a tune".

New Pathways in Science (1939)

It is also a good rule not to put overmuch confidence in the observational results that are put forward until they are confirmed by theory.

As quoted in "Annals of Science II-DNA" by Horace Freeland Judson|Horace Freeland Judson in The New Yorker|The New Yorker (4 December 1978), p. 132

We used to think that if we knew one, we knew two, because one and one are two. We are finding that we must learn a great deal more about 'and'.

As quoted in A Dictionary of Scientific Quotations (1991) by Alan L. Mackay, p. 79 :Published versions of his Gifford Lectures|Gifford Lectures delivered in the University of Edinburgh (January - March 1927)

 
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