What is the Great Attractor?

Rewritten and adapted from Wikipedia, the Great Attractor is an apparent gravitational anomaly located at the center of the Laniakea Supercluster, which is the supercluster in which the Milky Way is located.

Because the Great Attractor is located behind the Milky Way Galaxy's Center of Avoidance and blocks out view due to its intense brightness, it is referred to as an "apparent gravitational anomaly".

The anomaly is concentrated in a much smaller space and has an apparent mass thousands of times that of the Milky Way Galaxy.

The Great Attractor is presently 370 miles per second away from us and 250 million lightyears away from it.

The Great Attractor is a gravitational anomaly in intergalactic space within the Laniakea Supercluster, affecting the motion of galaxies, including the Milky Way. Its exact nature is not fully understood.