Michelson and Morley in the 1890s made an experiment proving, quote: "beyond any doubts" there is no "aether", or that space is empty and does not exist!
And this interpretation is still in force in science as it is mandatory to explain light's absolute speed (from the point of view of science).
Even more problematic in science, while physical atomic-subparticles pop haphazardly out of space, the quantum vacuum is also nevertheless absolutely empty.
In gravimotion's interpretation of Nature nothing can occur without occurring under something real, as is the case for space-time in science; any volume, having dimensions other than zero, has to be defined by one or more real entity within its boundaries; otherwise such emptiness is per definition dimensionless and does not occur.
In gravimotion's interpretation of Nature and as already mentioned Einstein's space-time, the present mo(ve)ment, is actually occurring as pure dynamic-MOTION-volumes abolishing altogether both our concepts of time and space.