Ursa Major Cluster
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The Ursa Major Cluster, not to be confused with the Ursa Major Moving Group, is a spiral-rich galaxy cluster of the Virgo Supercluster.
One of its biggest galaxies are NGC 3631, NGC 3953, NGC M109 on north and NGC 3726, NGC 3938 NGC 4051 on South.
The Ursa Major cluster is located at a distance of 18.6 megaparsecs (60 million light years) and contains about 30% of the light but only 5% of the mass of the nearby Virgo cluster.
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