A Distant Supercluster of Galaxies Points To Self-Interacting Dark Matter
The El Gordo supercluster is unusually large given its distance. How could such a large galaxy cluster form so quickly? The answer could be that dark matter is self-interacting in an interesting two-state way.
Seven billion light-years from Earth, there is an unexpected cluster of galaxies. It has two regions in the process of colliding with each other with a combined mass of more than two quadrillion solar masses. Given its mass, the distant cluster has b... [3058 chars]
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- Friday, 16 October 2026, 7:51 pm IST
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