Gravitational Lensing
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Looking through a lensing galaxy cluster hubble can see fainter and more distant galaxies than otherwise possible.
Stars and planets can cause gravitational lensing effects although those are hard to detect.
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Gravitational lensing. The effect is analogous to that produced by a lens. One of the most remarkable predictions of einsteins theory of general relativity is that gravity bends light. It is like having an extra lens that is the size of the galaxy cluster. The gravitational fields of galaxies and.
Gravitational lens matter that through the bending of space in its gravitational field alters the direction of light passing nearby. Today it is used to study many phenomena and objects in the distant universe. Gravitational lensing not only distorts the image of a background galaxy it can amplify its light. Gravitational lensing acts as a coordinate transformation that distorts the images of background objects usually galaxies near a foreground mass.
While gravitational lensing has existed throughout history its fairly safe to say that it was first discovered in the early 1900s. The transformation can be split into two terms the convergence and shearthe convergence term magnifies the background objects by increasing their size and the shear term stretches them tangentially around the foreground mass.