the great attractor

Explainer: what is the Great Attractor and its pull on our galaxy?

Explainer: what is the Great Attractor and its pull on our galaxy?

Around four decades ago, astronomers became aware that our galaxy, the Milky Way, was moving through space at a much faster rate than expected. At 2.2-million kilometres an hour, the speed of the Milky Way through the Cosmos is 2,500 times faster than a cruising airliner; 55 times more than the escape velocity from Earth; and a factor of two greater than even the galaxy’s own escape velocity! But where this motion comes from is a mystery.