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Gravity tested on large scales

Albert Einstein's general theory of relativity has passed a rigorous test on the scale of galaxy clusters. But the test does not rule out a popular alternative model of gravity. See Letter p.567

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Figure 1: Measuring the gravitational redshift of an idealized galaxy cluster.


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Correspondence to Gary Wegner.

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Wegner, G. Gravity tested on large scales. Nature 477, 541–543 (2011).

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