One of the largest quasars in the early Universe has helped reveal a vast “primordial cluster” of early galaxies, which is expected to grow larger than any galaxy cluster we know of.
Protoclusters are the primordial beginnings of the galaxy clusters we see in this region of the universe, before they were bound together by gravity. Astronomers typically look for them by pointing telescopes across large swathes of space, and…
Source: www.newscientist.com