aggregating into denser matter...
As usual, Occam's principle provides the sharpest edge on the tool of reason, and your statement there Lloyd, probably cuts closest to the bone. The intellectual gymnastics one must go through to muddle up space and time (duration), and then puddle that illogical mess into 'wells of gravity' where mysteriously-formed bodies of mass then magically fall in to place; not to mention the horribly convoluted mathematics being devised to describe the situation, but never explain it...
Well for some it has almost become a form of mental masturbation, if one can use that term in mixed company.
However one may conceive of "space", it is indisputably something; it is certainly not 'nothing'. As Lloyd and quite a few others here have made clear, gravity aggregates space into "denser matter".
The obvious inverse would be 'light', diffusing matter back into space. Simply strike a match, that is what is happening.
Various models have been presented on this forum describing the role of electricity, in its various manifest forms, as the universal mediator between the above listed states. In those models, electricity is the common ground, gravity is more like the return leg of a perpetual (as far as we know) circuit.
The further we are able to peer out in to space, the more apparent the electric relationships become.