The total mass within giant galaxy cluster CL0025+1654, about billion light-years away, produces a cosmic gravitational
The total mass within giant galaxy cluster CL0025+1654, about billion light-years away, produces a cosmic gravitational lens bending light as predicted by Einstein's theory of gravity and forming detectable images of even more distant background galaxies. researchers have solved the problem of tracing the dark matter layout. Their resulting map shows the otherwise invisible dark matter in blue, and the positions of the cluster galaxies in yellow. The work, based on extensive Hubble Space Telescope observations, reveals that the cluster's dark matter is not evenly distributed, but follows the clumps of luminous matter closely
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