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Hydra Cluster : ウィキペディア英語版 | Hydra Cluster
The Hydra Cluster (or Abell 1060) is a galaxy cluster that contains 157 bright galaxies and can be viewed from earth in the constellation Hydra.〔Wehner and Harris, p.1〕 The cluster spans about ten million light years and has an unusually high proportion of dark matter.〔(''The Hydra Cluster of Galaxies'' ) Astronomy Picture of the Day〕 The cluster is part of the Hydra-Centaurus Supercluster located 158 million light years from earth. The cluster's largest galaxies are elliptical galaxies NGC 3309 and NGC 3311 and the spiral galaxy NGC 3312 all having a diameter of about 150,000 light years.〔(''The Hydra Supercluster'' ) An Atlas of the Universe.com〕 In spite of a nearly circular appearance on the sky, there is evidence in the galaxy velocities for a clumpy, three-dimensional distribution.〔 〕 ==References==
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「Hydra Cluster」の詳細全文を読む
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