Laniakea

supercluster, the basin of attraction of peculiar velocities · Tully, Courtois, Hoffman, Pomarède, 2014

Points — real galaxy groups from the Cosmicflows program (Kourkchi–Tully catalog, redshift distances, H₀=75: the Attractor region is compressed toward us by the map projection). The boundary — the watershed of a model gravitational field computed from the catalog masses and external nodes; an approximation, not a Cosmicflows calculation. Flows — streamlines of that same field.