Vacuum exerts a net zero force, or i guess pressure? on what's inside it, right? So if the universe is expanding at an accelerating rate, is the vacuum of outer space is growing? Like space is geometrically flat but expanding under an outward time curve, so vacuum is what's increasing first as it expands.
Does that mean that gravity is the shift in the net force away from zero when an object is close to a much bigger object? In the sense that at some distance, the net force of the expanding vacuum on the smaller object will degrade in the direction of the bigger object, or rather that force will be stronger from every direction except towards the bigger one.
But the stuff I've read discusses gravity as a wave, particle, or fundamental force. Am I getting this totally wrong or are those different ways of conceptualizing it relative to other things?
If the vacuum is growing, it's exerting a force, right? Is that causing energy to just spring into existence? I've been trying to understand what zero-point energy and dark energy are-- is that related to that at all?
Thanks, I know these are pretty clumsy questions, and I may have some concepts tangled up real bad.