Similar activity continued on a smaller scale thereafter. The various sorts of active galaxy that we see today may be similar objects but they are viewed from different angle
Although the galaxies move randomly within a cluster, the clusters are rushing apart from each other. This is revealed by their red shifts. The galaxies motion has no center; viewed from any galaxy, all other galaxies seems to be rushing away. The further away the galaxy, the faster it recedes. The speed of recession is 17 to 30 Km/ Sec for every billion light years of distance.