The Farthest Galaxy
Astronomers from the University of Hawaii have found a galaxy surrounding the most distant supermassive Black Hole yet found, 12.8 billion years in the past. The Black Hole, found by the Subaru telescope atop Mauna Kea, has a billion times the mass of our Sun. It and the host galaxy were formed in the first billion years of the Universe. Present-day science can not explain how the giant Black Hole formed. The forthcoming paper concludes:
"The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea
has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations
from this sacred mountain."
Every galaxy examined contains at its centre a supermassive Black Hole. They are very likely primordial, formed in the immense densities following the Big Bang. Size of a primordial Black Hole is limited by a "horizon distance" related to the speed of light. If c were always the same value, PBH's would all be tiny. Discovery of massive primordial Black Holes is a clue that the speed of light has slowed.