There are massive problems with ideas like individual galaxies making up parts of some kind of galactic neural network where the information being exchanged takes place of billions of years to form some "super thought."

Not the least of which is that it doesn't say anything, it's a stoner thought that for all I know is totally true, but it's so impossible to either prove, model or test, and it doesn't provide a more plausible explanation for anything.

We can just as easily say that a handful of gravel I pick up may form some kind of neural network because technically they are sharing information in subtle ways. A panpsychist might say "exactly!" and I just say "Why? What does this idea explain better than the models we have now?"

The other huge problem is the expansion of the universe and the way light behaves. I am not sure the cosmic super entity is doing so hot considering how rapidly it's tearing itself apart. Since light doesn't really experience time either way, those "thoughts" trapped in patterns of light rays basically had one moment of thought and then dispersed so far and wide that it was essentially instant. I could easily come up with workarounds that keep the idea alive, but then at that point aren't we just desperately trying to find God?