The Great Attractor is a concentration of mass roughly 150 to 250 million light-years away toward which the Milky Way and thousands of neighboring galaxies are streaming at several hundred kilometers per second. It sits behind the plane of our own galaxy, in the region astronomers call the Zone of Avoidance, where dust and stars obscure the view and made it difficult to study for decades. It is now understood as the gravitational focus of Laniakea, the supercluster our galaxy belongs to. Much of the pull appears to come from still more distant mass beyond it.