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. A quasar jets energy in an illustration. A newfound quasar cluster is the universe's biggest known object. Illustration courtesy M. Kornmesser. Astronomers have discovered the largest known structure in the universe, a clump The structure is a large quasar group (LQG), a collection of.