| http://www.w3.org/ns/prov#value | - Although galaxy clusters as massive as this do exist in the nearby Universe, for example the Bullet Cluster, nothing like this has ever been seen to exist so far back in time, when the Universe was roughly half of its current age of 13.8 billion years.Astronomers previously weighed El Gordo back in January 2012, studying the unusual cluster???s appearance and dynamics in the X-ray part of the spec
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