Also found in: Acronyms.
Local SuperclusterA huge flattened cloud of galaxies and clusters of galaxies that is centered on or near the Virgo cluster and contains the Local Group (including our Galaxy) as an outlying member. Its radius is believed to be about 30 megaparsecs. Although its reality was for long in doubt, the discovery of other superclusters has convinced most astronomers that the Local Supercluster is a true physical system. The Local Group is moving toward Virgo at a velocity of 250–300 km s–1 in what is known as the virgocentric flow.
Local Supercluster[′lō·kəl ′sü·pər‚kləs·tər]
A great flattened system of groups and clusters of galaxies, about 1.5 to 2 × 108 light-years (1.4 to 1.9 × 1024 meters) across, which includes the local group of galaxies and the Virgo Cluster. Also known as Virgo Supercluster.