A supernova occurred in July of 1054, the same month that the East West Schism began. The supernova left behind this Crab Nebula:

Now here we are in July of 2021, and the schism, which has been building for years now, has reached a new height, with the Coalition for Cancelled Priests. I don’t think this is a small step. I think this CFCP organization will snowball and result in many priests and laity leaving communion with the Pope and the body of Bishops.