One of the Largest Structures in the Universe:

Astronomers recently discovered a group of active galactic cores that stretch more than 4 billion light-years end to end. The structure is a large quasar group (LQG). And it is simply massive.



For comparison, the Milky Way is about 100,000 light-years across. Our closest neighboring galaxy (Andromeda) is some 2.5 million light-years distant, and it is more than twice the size of the Milky Way (about 260,000 light-years). Which means that this LQG could easily swallow Andromeda, the Milky Way, and all the space in between.

Learn more about this amazing structure and how is impacts the cosmological principle at:
http://www.fromquarkstoquasars.com/largest-structure-in-the-universe-discovered/

Image source:
NARO