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this image taken with the hubble space

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telescope shows a distant galaxy located

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in the constellation fornax

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it is the largest and one of the most

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complete einstein rings ever discovered

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this object's unusual shape is the

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result of gravitational lensing

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albert einstein in his general theory of

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relativity first theorized that a large

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gravitational field could act as a lens

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a huge amount of matter like a cluster

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of galaxies creates a gravitational

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field that distorts and magnifies the

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light from distant galaxies that are

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behind it but in the same line of sight

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the effect is like looking through a

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giant magnifying glass

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in this case the light from the

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background galaxy was distorted into the

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curve we see by the gravity of the

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galaxy cluster sitting in front of it

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the near exact alignment of the

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background galaxy with the central

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elliptical galaxy of the cluster seen in

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the middle of this image has warped and

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magnified the image of the background

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galaxy around itself into an almost

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perfect ring

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to get this clear an image of the far

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distant galaxy on its own hubble's

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eight-foot primary mirror would have to

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have a diameter of 157 feet

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objects like these allow us to research

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galaxies that would otherwise be too

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faint and distant to see in such detail

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helping us learn more about our amazing