Hundreds of New Gravitational Lenses Discovered to Help Study the Distant Universe

The workings of the Universe.
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fred8615
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Hundreds of New Gravitational Lenses Discovered to Help Study the Distant Universe

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General relativity tells us that everything, even light, is affected by the mass of an object. When a beam of light passes near a large mass, its path is deflected. This shift in the direction of light is known as gravitational lensing, and it was one of the first confirmed effects of Einstein’s theory.

In cosmology, there are two types of gravitational lensing, and both play an important role in understanding the evolution of the universe. The first is weak lensing, where light from a distant galaxy passes through a cluster of galaxies, but not close to any particular galaxy. The bending of light is small, which means the shape of the galaxy is distorted slightly. By looking at these distortions, astronomers can measure the average density of matter in the universe. This helps us understand dark energy.

Read more: https://www.universetoday.com/146138/hu ... -universe/
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

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