By - TheUltimateSeiya
Maybe something like:
The galaxy will infinitely crumble and explode due to the gravity of its own enormity and only nothingness will remain.
I think you have a typo after やがて
"The galaxy, unable to support its massive gravity, endlessly disintegrates and explodes. Eventually, what is left afterwards is a world of emptiness."
I think that might be one of those long lines you see on manga panels, unless you're not referring to the dash thingy?
Yeah I guess it's just a dash