However recently hyperclusters of galaxies have been discovered that are more than 3 billion light years across. This poses a problem for the Big Bang Cosmology which actually had already failed to predict the accelerating expansion of the universe now it’s blown this one. By the way these two are just the biggest Big Bang blunders but there are others.
This raises the question that since science is about testability and theories are test by the accuracy of their predictions, how many failed predictions will it take for the Big Bang to even be questioned. The answer with regards to the scientific establishment is that no amount of failed predictions will ever dethrone the Big Bang it has reached that status of untestability since will always be patched to fit reality not matter what ad hock invention it takes to do it.