> In some cases, an extreme density of billions of galaxies I think you might be overestimating how dense a galaxy is, in the grand scheme of things. You may t

> In some cases, an extreme density of billions of galaxies I think you might be overestimating how dense a galaxy is, in the grand scheme of things. You may think it's a long way down the road to the chemist's, but it's still almost entirely empty space.