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'Cosmic Horseshoe' may contain black hole the size of 36 billion suns — one of the largest ever detected

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The " Cosmic Horseshoe " is a system of galaxies located in the constellation Leo .

Images of the system show a halo of light surrounding the foreground galaxy, LRG 3-757 .

This phenomenon occurs when the significant mass of the galaxy warps and magnifies light from an even more distant galaxy.

This type of magnification is called gravitational lensing and was predicted by Albert Einstein in 1915 .