RX J1347.5-1145

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RX J1347.5–1145 is one of the most X-ray-luminous and most massive galaxy clusters known.[1] Redshift was noted as z=0.451 with an X-ray luminosity of 1045 ergs s-1 in a paper from 2002.[2] In 2013, one study found eight cases of the same object resulting from the intense gravitational bending of light.[3] That study made use of data from Cluster Lensing And Supernova survey with Hubble (CLASH) as well as other sources.[3] The cluster is roughly 5 billion light years away from our Solar System.

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