Astrophysics (Index)About

Laniakea Supercluster

(Laniakea, Local Supercluster)
(group of clusters including the Local Group)

The Laniakea Supercluster (considered the Local Supercluster) is a supercluster with 300-500 galaxy clusters, with 100,000 galaxies including the Milky Way, stretched out over 160 megaparsecs, with a mass of about 1017 solar masses. It was defined as such in September 2014 based upon a study of the velocities of the galaxies. It combines four groups traditionally labeled superclusters:

A study has suggested it is not gravitationally bound in which case whether the term "supercluster" applies is a matter of nomenclature.

(galaxy supercluster,local,large scale structure)
Further reading:

Referenced by pages:
astronomical quantities
Coma Supercluster
Great Attractor
Hydra-Centaurus Supercluster
Virgo Supercluster