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The Virgo cluster with its attached groups of galaxies is far from being the only supercluster in the universe. It has been estimated that there may be over a hundred superclusters within a billion light-years of our own. Our local supercluster is not even the largest. But it does seem to be reasonably characteristic. For example, other superclusters also consist of a large central cluster of galaxies surrounded by an extended halo of smaller groups. As with our own supercluster, these haloes are appreciably flattened. Looking out at neighboring superclusters helps us to understand why.
KeywordsBlack Hole Dark Matter Dark Energy Local Group White Dwarf
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