gravitational lensing

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.

For more information about gravitational lensing check the Wikipedia article here

ZME Science posts about gravitational lensing

Nomad planets may litter Milky Way

Sun, Feb 26, 2012

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According to a recent study published by researchers from the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), our galaxy may be ‘infested’ with nomad planets, which wander aimlessly instead of orbiting a star. Furthermore, the study concluded there may actually be 100,000 times more “nomad planets” in the Milky Way than stars. If this [...]

Astronomers use massive objects in space as huge telescopes, find brightest galaxy via gravity lens

Tue, Feb 7, 2012

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Whenever a massive object, with an equally massive gravitational pull, like black holes or galaxy clusters, falls between an observer, say a telescope, and a distant target in the background to be observed, than a gravitational lens is formed. Light emitted from the distant object gets twisted by the massive object, and ends up distorted [...]

Hubble captures disk of matter around black hole – birth of a quasar

Mon, Nov 7, 2011

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The Hubble telescope has captured through an innovative technique, which harnessed light bent from a distant galaxy in a optical lens-like manner, a  direct image of a disk of matter surrounding a black hole. The disk, made out of gas and dust, slowly swirls around a giant black hole’s center gradually getting consumed. Powered by [...]

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