`Einstein's Ring' Spotted

From: The Washington Post | Date: June 13, 1988| Author: Philip J. Hilts | Copyright information

A celestial illusion, famous because it was predicted by Einstein but unseen since the prediction 52 years ago, was finally spotted by an astronomer at MIT's Haystack Observatory in Massachusetts.

The illusion is called "Einstein's ring." It appears through a radio telescope as a circular or elliptical object in the sky.

Einstein's theory of relativity says, among other things, that the gravitational field of massive objects would be so great as to bend the light passing nearb...

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