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.

Credit:

A. Romanowsky (SJSU), Subaru, Hubble Legacy Archive

About the Image

Id:noao1503a
Type:Collage
Release date:July 27, 2015
Related releases:noao1503
Size:1436 x 1079 px

About the Object

Category:Galaxies

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