CDG-2

CDG-2
Image of Candidate Dark Galaxy 2 (CDG-2) taken by Hubble Space Telescope, with the four globular clusters in it highlighted.
Observation data
ConstellationPerseus
Right ascension03h 17m 12.61s
Declination+41° 20′ 52.64″
Distancec. 245 million ly
Group or clusterPerseus
Notable featuresIs a dark galaxy

Candidate Dark Galaxy 2 (CDG-2) is a dark galaxy composed predominantly of dark matter, along with four globular clusters, in the Perseus cluster. It is one of the most dark matter dominated galaxies ever discovered, estimated to be between 99.94% and 99.98% dark matter.

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