   superclusters are large groups of smaller galaxy groups and galaxy clusters and are among the largest known structures of the cosmos. ==existence== thumb|left|the abell 901/902 supercluster is located a little over two billion light-years from earth. the existence of superclusters indicates that the galaxies in our universe are not uniformly distributed; most of them are drawn together in groups and clusters, with groups containing up to some dozens of galaxies and clusters up to several thousand galaxies. those groups and clusters and additional isolated galaxies in turn form even larger structures called superclusters. superclusters form large structures of galaxies, called "filaments", "supercluster complexes", "walls" or "sheets", that may span between several hundred million light-years to 10 billion light-years, covering more than 5% of the observable universe. observations of superclusters likely tell us something about the initial condition of the universe when these superclusters were created. the directions of the rotational axes of galaxies within superclusters may also give us insight into the formation process of galaxies early in the history of the universe.  interspersed among superclusters are large voids of space in which few galaxies exist. superclusters are frequently subdivided into groups of clusters called galaxy clouds.  ==list of superclusters== ===nearby superclusters=== {| class="wikitable" style="text-align:left; width:100%;" |- ! style="background:#efefef;"| galaxy supercluster ! style="background:#efefef;"| data ! style="background:#efefef;"| notes |- | laniakea supercluster | * z = 0.000 (0 light years away) * length = 153 mpc (500 million light years) | the laniakea supercluster is the supercluster that contains the virgo cluster, local group, and by extension our galaxy, the milky way.earth's new address: 'solar system, milky way, laniakea' / nature |- | virgo supercluster | * z=0.000 (0 light years away) *
Galaxy_superclusters Large-scale_structure_of_the_cosmos