The Laniakea Supercluster encompasses approximately 100,000 galaxies stretched out over 160 Mpc (520 million ly). It has the approximate mass of 1017 solar masses, or 100,000 times that of our galaxy, which is almost the same as that of the Horologium Supercluster. It consists of four subparts, which were known previously as separate superclusters:
Virgo Supercluster, the part in which the Milky Way resides.
Hydra–Centaurus Supercluster
the Great Attractor, Laniakea's central gravitational point