The texture of the universe.

The large-scale structure of the universe is examined in terms of the structure of the local supercluster. A red shift survey over a red shift range of 6000-24,000 km/s shows a large void for 12,000-18,000 km/s in the Booetes region. Other surveys show that filaments of galaxies stretch over tens of degrees from the dense core of the local supercluster. Intervening volumes often show large regions of low galaxy density. Another survey, which includes 2400 galaxies with red shifts averaging about 5000 km/s, reveals a 'frothy' structure of dense strings and voids on scales of tens of megaparsecs.