January 12, 2013

Astronomers Find Largest Structure in Universe

Mike Wall, Space.com

AP Photo

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.

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TAGGED: Cosmology, Universe, Quasars