A Collision Between Gigantic Galaxy Clusters. Too Big, Too E

Astronomers take another look at gigantic galaxy clusters by finding the mass of the El Gordo cluster. They find that it formed too early.

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United Kingdom , Bonn , Nordrhein Westfalen , Germany , Scotland , Pavel Kroupa , Indranil Banik , El Gordo , Elena Asencio , Charles University , School Of Physics , University Of Bonn , Cosmic Microwave , Hubble Space Telescope , Bullet Cluster ,