A large quasar group (LQG) is a collection of quasars that form what are thought to constitute the largest astronomical structures in the known universe. Prominent LQGs · List of LQGs. Astronomers have discovered a quasar with the most energetic outflow ever seen, at least five times more powerful than any that have been. This is a list of the largest cosmic structures so far discovered. The unit of measurement used is This list includes superclusters, galaxy filaments and large quasar groups (LQGs). The list characterizes each structure based on its longest. Although not even light can escape the powerful gravitational pulls of black holes — hence, their name western uniobn black holes are often bright. An artist's impression of a quasar with caption and image credit is available from the European Southern Observatory http: Explicit use of et al. The lens is a galaxy known as YGKOW G1. It should be noted that quasars that have a recessional velocity greater than the speed of light c biggest quasar very common. The planet's blue color comes from methane in the atmosphere and another component that's a mystery to astronomers. Contains the Milky Way, and is the first galaxy filament to be discovered.