"This is a very high concentration of galaxies in the universe and it is very rare. This means what the scientists have observed is actually the past. "This helps us understand how the universe must have been many many years ago. Dark energy, as we all know, is behind the expansion of the universe but nobody has ever actually detected it. This supercluster is clearly embedded in a large network of cosmic filaments traced by clusters and large voids.

Source: Times of India July 13, 2017 19:14 UTC