gravitational lens

gravitational lens

 
noun Astronomy.
a heavy, dense body, as a galaxy, that lies along our line of sight to a more distant object, as a quasar, and whose gravitational field refracts the light of that object, splitting it into multiple images as seen from the earth.
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Origin:
1975–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Gravitational lens is always a great word to know.
So is eon. Does it mean:
the Lion, a zodiacal constellation between Virgo and Cancer, containing the bright star Regulus
one billion years
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Collins
World English Dictionary
gravitational lens
 
—n
astronomy a lenslike effect in which light rays are bent when passing through the gravitational field of such massive objects as galaxies or black holes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
gravitational lens  
A massive celestial object, such as a galaxy, whose gravity can act as a lens that functions to bend and focus the light of a more distant object. This results in a magnified, distorted, or multiple image of the original light source for a distant observer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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