Published experiments found on this website are proportional to what happens as the universe expands due to mass-density instabilities in the universe. The exact steps in the exact solution for the density differences (instability) of our expanding universe is given in Hydrodynamic and Hydromagnetic Stability (International Series of Monographs on Physics): Chandrasekhar, S.: 9780486640716: Amazon.com: Books
The experiments I ran are flow instabilities. They show what happens to make the boundary on an expanding droplet (where the droplet boundary is an interface between two energy magnitudes). Such initiating boundaries go unstable. The boundaries/interfaces buckle into sine waves (crests expanding outward and troughs resisting that outward motion (depending on their curvature)).
All universal systems (and subsystems) oscillate (are unsteady and unstable). So, whether they are oscillating about their cgs (centers of gravity) like a very small particle (maybe a photon that has a high frequency of oscillation), or are a supermassive black hole (that oscillates at a very low frequency) they create tension in some field that results in universal buckling (into sine waves: crests and troughs, that each have their own characteristics in ways of creating and deleting space).
In mass-density instabilities, the troughs act like gravity wells whose massive objects curve 3D space (at a particular delta time), resisting universal expansion at the crests.
Many think that space is empty between gravity wells (sine-wave troughs), but Newton’s equation for non-relativistic gravitational forces between gravity wells only needs to work over a distance to create a tensile field.
Take a look at a couple of pages showing what was observed/published in our experiments: THE EXPERIMENT Scroll down to the bottom of this page to see different unstable flow (mostly initial) configurations. Notice some of them have crests curving in opposite directions than troughs/gravitational-wells.
Click on the following link. To focus on an extreme trough, notice how illustration number three shows crests that are curved in the opposite direction of troughs (gravitational wells). I believe this is how space is curved, producing something like matter, though there are no visible objects. This configuration may occur at the exits of black-hole galaxies and called “dark matter.” https://unionofoppositesdotcom.files.wordpress.com/2018/02/the-first-cell.pdf
Note that the above condition of narrow trough development arises in expanding droplets and primitive cells (allowing them to divide exactly in half). I propose the same thing happens in our universe as it experiences gravitational tension between gravitational wells and expanding crests.
The oscillations of universal systems, their straight line and rotational motions, inform their form/function. We can think of form function as objects and their movements existing as one (and not two separate things). That means objects educate the creation of spacetime. The energetic energy in objects (universal subsystems) sweeps out its own space.
There is a good illustration of what is shared in the above paragraph. The smallest and most ubiquitous element in the universe (a simple hydrogen atom) exists in two places at once as it oscillates. Anything larger that is more massive than the hydrogen atom, has a cg that is statistically located mostly within its boundary. Anything smaller in size (like EM waves/particles in the expanding crest) exists in many places due to its energetic nature. The space they carve out is what we usually call empty space, but it is only the space these energetic subatomic particles naturally occupy.
Outer space looks empty because the smaller a particle (universal subsystem) is, the greater the surface area and its ability to interact with everything else (This is the square/cube law). When we go to sample these energetic particles, they are in so many places, it is hard to sample (detect) them at any one place in time.