About the cover
A slice through the Laniakea supercluster home: velocity flow streams within our supercluster are shown white, external flows dark blue. The Milky Way is a member of the Local Group of galaxies. The Milky Way is a member of the Local Group of galaxies. Now have sufficient data on the distances and motions of galaxies to be able to describe a much larger level of organization in our corner of the Universe a supercluster 160 megaparsecs across and containing 1017 solar masses. Brent Tully et al. use a new catalogue of peculiar velocities, line-of-sight departures from cosmic expansion caused by gravitational perturbation, to develop a map representing the distribution of matter. They identify a home supercluster that they name Laniakea from the Hawaiian lani and akea (heaven and spacious). It includes the Virgo cluster, the Norma, Hydra and Centaurus clusters (also known as the Great Attractor), the Pavo-Indus filament and a number of voids. Cover art: Mark A. Garlick / Source: Daniel Pomarede.