Wherever the field can be detected, and more particularly where mass and density exist, the expansion of the universe creates virtual vacuums, that pull on the surrounding energy and material. Viewed from afar, a galaxy of a billion suns manifests its visible light, reflected and radiant from myriad surfaces, and broadcasts information about its mass, its scale, its spin and its drift. At every point in the galaxy the power of expansion pulls energy from energy and matter from matter. The denser the materials, the more points they contain and the longer the surfaces resist incoming matter and energy. The eighty percent indicates the ubiquitous and universal power of the expanding universe on sub-atomic scales.
Gravity is caused by the expansion of the universe.
The power of expansion is the underlying, primary and unifying force in the universe from which all forces arise. If the expansion were to stop and reverse, what might be the consequences. First, the micro supra and super vacuums would no longer occur. The power of gravity would be switched off. The holes drawing energy and matter towards dense centres would not open.