Great Attractor
A massive gravitational anomaly in intergalactic space at the center of the Laniakea Supercluster pulling galaxies across hundreds of millions of light-years.
Governing formula
v_peculiar ~ 600 km/s towards Laniakea Supercluster center
SI unit
M_☉ (Gravitational Anomaly Mass)
In depth
Located in the 'Zone of Avoidance' obscured by the Milky Way's galactic plane. Causes peculiar motion velocities in hundreds of galaxy clusters, including the Local Group, pulling them toward the Norma Cluster region.
Examples in the real world
The Milky Way galaxy moving at ~600 km/s relative to the CMB frame toward the Great Attractor region.