Gravity Lens Explained

NASA GLE
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last update 07.22.2001

 

So what is a Gravity Lens, anyway?

 

A Gravitational Lensing Effect, or GLE, is a phenomenon in astrophysics where a supermassive object has a sufficient gravitational field to deflect light waves passing nearby, acting like a giant lens in space. These objects can range from something relatively small, like a black hole or a white-dwarf star, to something huge like a cluster of galaxies. This phenomenon was proposed in the early 20th century by Albert Einstein, and was first detected in 1979.

NASA explains the GLE at this link.

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