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Hiding in Plain Sight: Undergraduates Discover the Densest Galaxies Known
Two ultra-dense galaxies (insets) have been discovered orbiting larger host galaxies. The compact systems are thought to be the remnants of once normal galaxies that were swallowed by the host, a process that removed the fluffy outer parts of the systems, leaving the dense centers behind.
Créditos:A. Romanowsky (SJSU), Subaru, Hubble Legacy Archive