I heard yesterday that relative to their size, galaxies are much closer together than stars. I’d never heard that, so I looked into it. Just using orders of magnitude, the sun is 109 meters wide and the nearest star is 1016 meters away. The Milky Way is 1021 meters wide, and the Andromeda galaxy is 1022 meters away. So stars are millions of diameters apart, but galaxies are tens of diameters apart.