It almost a century ago since the Great Debate where Harlow Shapley and Heber Curtis discussed the size of the universe. With the aid of Hubble we got to know a lot more about our place in space. And now, we know even more.
It turns out we are part of a supercluster of galaxies called Laniakea and it’s of course massive beyond comprehension. It spans more than 500 million light-years and contains more than 100,000 galaxies.