I don't think there's such a concept as "higher-gravity region" in modern physics, unless you're thinking about "in the vicinity of a giant star, black hole, or something equally massive."
However, if most of the known universe is sitting next to a gigantic mega-blackhole (or enough of them to cover the whole sky), then surely we would have noticed by now...
> I don't think there's such a concept as "higher-gravity region" in modern physics, unless you're thinking about "in the vicinity of a giant star, black hole, or something equally massive."
I think at the beginning of the universe, there might be a lot of regional discrepancies. They might even just be "temporary" regional discrepancies from gravitational waves due to the inherent nature of the universe growing and everything still crashing together.
The cosmic microwave background tells us there were practically no discrepancies at all, actually. Not too surprising, since at the densities back then even a small local fluctuation would easily have become a black hole.
The very early universe wasn't perfectly uniform, but it was really, really close.
However, if most of the known universe is sitting next to a gigantic mega-blackhole (or enough of them to cover the whole sky), then surely we would have noticed by now...