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An Einstein Ring is a special case of gravitational lensing, caused by the exact alignment of the source, lens, and observer. This results in symmetry around the lens, causing a ring-like structure. [2] The geometry of a complete Einstein ring, as caused by a gravitational lens. The size of an Einstein ring is given by the Einstein radius.
The aqua circle is the light source as it would be seen if there were no lens, while white spots are the multiple images of the source (see Einstein ring). A gravitational lens is matter, such as a cluster of galaxies or a point particle , that bends light from a distant source as it travels toward an observer.
The main lens lies at redshift z = 0.222, with the inner ring at z = 0.609 with an Einstein radius R E = 1.43 ± 0.01" and magnitude m = 19.784 ± 0.006, the outer ring is at z ≲ 6.9 with R E = 2.07 ± 0.02" and magnitude m = 23.68 ± 0.09 [1] The lensing galaxy is also known as SDSSJ0946+1006 L1, with the nearer lensed galaxy as SDSSJ0946 ...
A new photograph from the Hubble Space Telescope shows a stunning “Einstein Ring” billions of light-years from Earth — a phenomenon named after Albert Einstein.
Albert Einstein. Relativity: the Special and the General Theory, 10th edition (there are a total of 17 editions). ISBN 0-517-029618 at Project Gutenberg; Relativity: The Special and General Theory public domain audiobook at LibriVox; Albert Einstein, Relativity: The Special and General Theory (1920/2000) ISBN 1-58734-092-5 at Bartleby.com
Introducing Relativity is a 2002 graphic study guide to the theory of relativity and Albert Einstein written by Bruce Bassett and illustrated by Ralph Edney. The volume is, according to the publisher's website, "a superlative, fascinating graphic account of Einstein’s strange world," which, "plots a visually accessible course through the thought experiments that have given shape to ...
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