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Superclusters are large groups of smaller galaxy groups and galaxy clusters and are among the largest known structures of the cosmos.
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.[2]
Interspersed among superclusters are large voids of space in which few galaxies exist. Superclusters are frequently subdivided into groups of clusters called galaxy clouds.
In 2014, the newly announced Laniakea Supercluster subsumed the Virgo Supercluster, which became a component of the new supercluster.[4]
In 2014, the newly announced Laniakea Supercluster subsumed the Hydra-Centaurus Supercluster, which became a component of the new supercluster.[4]
In 2014, the newly announced Laniakea Supercluster subsumed the Pavo-Indus Supercluster, which became a component of the new supercluster.[4]
z=1.1
Length=70Mpc
z=0.42
Length=6Mpc
Andromeda Galaxy, Milky Way, Dark matter, Big Bang, Star
Mass, General relativity, Big Bang, Scattering, Universe
Local Group, Topological group
Local Group, Universe, Star, Solar System, Virgo Supercluster
Local Group, Galaxy, Astronomy, Supercluster, Milky Way
ArXiv, Galaxy, Universe, Astronomy, Galaxy filament
Big Bang, Dark matter, Milky Way, Astronomy, Hydrogen
Milky Way, Astronomy, Big Bang, Galileo Galilei, Galaxy