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gravitational lensing

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gravitational lensing

Bending of light by a gravitational field, predicted by German-born US physicist Albert Einstein's general theory of relativity. The effect was first detected in 1917, when the light from stars was found to bend as it passed the totally eclipsed Sun. More remarkable is the splitting of light from distant quasars into two or more images by intervening galaxies. In 1979 the first double image of a quasar produced by gravitational lensing was discovered and a quadruple image of another quasar was later found. Numerous multiple and/or distorted images of quasars and galaxies caused by gravitational lensing are now known.



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? Mentioned in ? References in periodicals archive
 
Computer modeling revealed that gravitational lensing couldn't plausibly account for the brightness and geometry of the three quasar images.
A cosmic pas de trois: triple-quasar system may signal galaxy mergers by Rowen, R. / Science News
The scientists used a special method called gravitational lensing.
Dark collision by Jaffe, Eric / Science News for Kids
To obtain the dark matter distribution, David Wittman, Anthony Tyson and David Kirkman of Bell Labs, along with two collaborators, Ian Dell'Antonio of both the National Optical Astronomy Observatory as well as Brown University and Gary Bernstein of the University of Michigan at Ann Arbor, used a method known as weak gravitational lensing, in which they analyzed the light from 145,000 very distant galaxies for evidence of distortions produced by dark matter that lay in its path.
Bell Labs Astrophysicists Map Large-Scale Distribution of Cosmic Dark ... by Business Wire
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