I know I’m asking the practically impossible to answer to my liking, it just boggles my mind that they appear to be telling us they are that good at determining what is happening billions of light years away. I mean really... Say these 2 or 3 colliding galaxies are actually millions of light years apart and due to their SIZES they appear colliding with red shift detection but in actuality they are passing one another...
Billions of stars in these galaxies and in the past 10 or 20 years were not seeing mega supernovas out of this collision? Christ if a couple super suns out with their gravitational pulls colliding with each other should light up half the universe!!
To be fair, 11.5 billion light years is a long ways away. Even a quasar or a supernova is hard to spot with a telescope. But if that were happening in our own galaxy, we’d all lose our molecular cohesion. Joe Biden could not cause that much damage, if you can believe it.
There is an awful lot of empty space between stars in most galaxies. I suppose it is possible for two galaxies to pass through each other or to merge into one without any stars colliding, particularly when you are talking about galaxies in the early stages of the universe, that may not have existed long enough for any super sized stars to form (e.g., lots of gas, but not a lot of stars).