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Ursa Major Cluster : ウィキペディア英語版 | Ursa Major Cluster
The Ursa Major Cluster (Ursa Major I Cluster, UMa I ClG) is a spiral-rich galaxy cluster of the Virgo Supercluster. Some of its largest members are NGC 3631, NGC 3953, M109 on North (M109 Group) 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. == External links ==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ursa Major Cluster」の詳細全文を読む
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