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" ... This isn’t what our universe looks like. Our universe looks much more cobwebby than gridlike, with big knots of galaxies, and little filaments of galaxies stretching away from each knot. The big knots are galaxy clusters, and can hold thousands of galaxies. Their smaller counterparts, galaxy groups, have a few galaxies in them. Our own galaxy is in a small group, with Andromeda, and a bunch of very small dwarf galaxies. ... "