Largest Structure in Universe: 4B Light-Years Long LQG

[Astronuc]

Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretches 4 billion light-years from end to end.

The structure is a large quasar group (LQG), a collection of extremely luminous galactic nuclei powered by supermassive central black holes. This particular group is so large that it challenges modern cosmological theory, researchers said.
. . . .
The quasar group appears to violate a widely accepted assumption known as the cosmological principle, which holds that the universe is essentially homogeneous when viewed at a sufficiently large scale.

Calculations suggest that structures larger than about 1.2 billion light-years should not exist, researchers said.

. . . .

Largest Structure in Universe Discovered
http://news.yahoo.com/largest-structure-universe-discovered-093416167.html

"An international team led by academics from the University of Central Lancashire (UCLan) has found the largest known structure in the universe. The team, led by Dr Roger Clowes from UCLan’s Jeremiah Horrocks Institute, has identified the LQG which is so significant in size it also challenges the Cosmological Principle."
http://www.uclan.ac.uk/news/uclan_team_discover_largest_structure_in_the_universe.php

 

[Mordred]

This is also previously posted in the cosmology forum today

 

[Chronos]

In a universe of this size there are bound to be anomalies. How large is large enough to be improbable is a statistical exercise.