Biggest structure in universe: Large quasar group is 4 billion light years across
Friday, January 11, 2013 - 10:00
in Astronomy & Space
Astronomers have found the largest known structure in the universe. The large quasar group (LQG) is so large that it would take a vehicle traveling at the speed of light some 4 billion years to cross it. Quasars are the nuclei of galaxies from the early days of the universe that undergo brief periods of extremely high brightness that make them visible across huge distances. These periods are ‘brief’ in astrophysics terms but actually last 10-100 million years.