A super structure has been discovered in space that challenges what scientists thought was even possible. The image above (assumably an artist’s impression) is of a clump of active galactic cores that stretches 4 billion light-years from end to end.
Known as a large quasar group, or LQG, it is a collection of extremely luminous galactic nuclei, powered by supermassive central black holes. Quasars, known to assemble in large groups of up to more than 600 million light-years wide, are the brightest objects in the known universe.
Need perspective to imagine the monstrosity of this LQG? Well, the disc of our Milky Way galaxy is about 100,000 light-years wide, and our Milky Way is separated from the nearest neighbor galaxy, Andromeda, by about 2.5 million light years.
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