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Galaxy cluster research supports Einstein's Theory of Relativity on a cosmic level

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In one small win for Einstein, one giant win for mankind, scientists at the Niels Bohr Institute have proved his General Theory of Relativity on a cosmic scale through their research of large galaxy clusters. Accordingly, the clusters -- which are the largest known gravity-bound objects -- have such a strong pull that they should cause light to "redshift," or proportionally increase in wavelength, shifting towards the red end of the visible spectrum. To test it, researchers measured beams from 8,000 clusters, revealing that they do indeed cause a change in light's wavelength, supporting Einstein's theory to a T. One good turn deserves another, right Albert? Armchair cosmologists can hop on over to the source link to learn more.

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