Overview
Peculiar motions of galaxies refers to departures from pure Hubble flow that are expected from the gravitation peturbation of overdense and underdense regions, e.g, superclusters and voids. For three decades there has been a controversy about whether peculiar motions generated by structure on the ~100 Mpc scale explain the CMB dipole --- our Local Group's apparent motion of ~600 km/swith respect to the cosmic background radiation. Our study of peculiar motions of unprecedented accuracy in the Great Attractor supercluster strongly supports the explanation that this is the `prime mover' in this cosmic dance.