Observing the position of objects on the celestial sphere gives only a two-dimensional picture of the
Universe. But the Universe has 3 spatial dimensions. To get a true description of the 3D geometry of space
we must add distance information through measuring redshifts. Such measurements are beginning to give a
picture of a Universe that has visible matter distributed in great strings and soap bubbles that dwarf the
size of even superclusters of galaxies.