Gravitational Lens

A gravitational lens refers to a distribution of matter (such as a cluster of galaxies) between a distant source (a background galaxy) and an observer, that is capable of bending (lensing) the light from the source, as it travels towards the observer. This effect is known as gravitational lensing and is one of the predictions of Albert Einstein's general theory of relativity.

Although Orest Chwolson is credited as being the first to discuss the effect in print in 1924, the effect is more commonly associated with Einstein, who published a more famous article on the subject in 1936.

Fritz Zwicky posited in 1937 that the effect could allow galaxy clusters to act as gravitational lenses. It was not until 1979 that this effect was confirmed by observation of the so-called "Twin QSO" SBS 0957+561.

Read more about Gravitational Lens:  Description, History, Explanation in Terms of Space–time Curvature, Search For Gravitational Lenses, Historical Papers and References

Other articles related to "gravitational lens, gravitational, lens":

Orest Khvolson
... noted for being one of the first to study the gravitational lens effect ... His most noted accomplishment was in 1924, when he published about gravitational lenses in Astronomische Nachrichten, a scientific journal on astronomy ... The concept of gravitational lenses, did not get much attention until 1936, when Albert Einstein wrote about the gravitational lens effect ...
Gravitational Lens - Historical Papers and References
... "Lens-like Action of a Star by the Deviation of Light in the Gravitational Field" ... "The Origin of Gravitational Lensing A Postscript to Einstein's 1936 Science paper" ...