Right now, dark matter and dark energy are a math fantasy. There is no lab proof that these exist. Rather dark matter and dark energy are like math placeholders needed to maintain current standard theory, so the Bureaucracy of Science does not have to upgrade to a better and maybe different theory for the universe. Religion gets the lecture of needing lab proof, but we are ignoring this standard in cosmology.
Currently dark matter and energy is used to explain data anomalies within the universe relative to standard theory. However, since dark matter and dark energy have never been seen on the lab, to know 100% if they are real or just a placeholder for a bandaid theory, we could just as well say these affects are due to unicorns. Like dark energy and dark matter, unicorns also have not been seen in the lab, to know if real, or if they have unique properties up for the job.
The nouveau exotic names; dark energy and dark matter, can fool the unsuspecting into thinking the theory is settled, even we are using only a placeholder variable, that is not yet proven to be real. Since all we have is a placeholder, we could also use God as the placeholder. This variable would not change the math, since God has also not been shown in the lab to know all his properties. Does everyone see how the game works? We can stay with dark matter and energy for now, since they invented the game. I can play by these rules.
Gravity, if seen in a new light, can be a better placeholder variable, with no added expenses. I suppose spending $billions adds prestige to any theory, since who would spend so much money for only a placeholder? Big expensive and fancy Bobbles work on emotional thinkers so they will have an edge compare to low budget. But that is fine.
When the forces of nature, like the EM force, lower potential, photons are given off to reflect the change of energy. These photons can then be absorbed by nearby matter increasing their potential in an equal and opposite way; energy conservation. Since gravity creates a force that should give off potential, one might expect a parallel action and reaction effect to occur with gravity.
For example, the universe is expanding relative to the galaxies. If the action of gravity, for galactic (star) contraction, was giving off energy or a space-time potential effect, we should see the opposite of the gravitational contraction, elsewhere. This is observed. We see the space between all the galaxies expanding, in the opposite direction of galactic gravity contractions. This size difference of contraction and expansion; galaxies to space, should happen due to less mass density between the galaxies having to react to the output of orders of magnitude more galactic mass contracting into stars; energy conservation.
An effect we see closer to ourself is the rotation of the earth. Rotation will create a centrifugal force that has a force vector opposite to the pull of gravity; to center of gravity. Gravity pulls downward while the rotation, like a David and Goliath slingshot, will propel the stone away from us. Many galaxies, like the Milky Way, also spiral which would be a centrifugal effect opposite the contraction due to gravity but in a more banded way. This allows us to infer unique early galactic genesis of various galaxies.
Dark matter can also be explained with the concept of the center of gravity. The center of gravity between the earth and moon does not touch either the earth or the moon. It appears to be a magic point in empty space from which dark matter maintains the system. We may not see all the matter and not be able to infer more complex centers of gravity.
Science has been looking for gravitational waves and some have been found, but these alone do not seem to be enough to account for the effects discussed. However, the effect I have in mind is not a wave. If we look at earth's gravity, for simplicity, there are two layers of effects. One is based on General Relativity, while the other is connected to gravitational pressure and work and the phases of matter, such as the phases of water in the inner earth.
If we look at distance and time, the center of the earth, based on General Relativity, has space-time contracting the most at the center of gravity; time and space both contract as we move toward center; check. If we look at the phases of matter of the inner earth at the gradient of the extreme temperatures and pressured created by gravity, distances contract; matter gets denser, but time speed ups; higher frequency energy and matter vibrations as we go to the core. heat. Time is going in two directions, while distance goes in one direction relative to the two gravity affects. This discrepancy in time is the cause of the action and reaction; time potential. Time is not a wave since it goes in one direction; future. It is a single variable that will contract and expand as action and reaction.