I have had this theory for almost a decade and want to get this out there so others can share their opinion on it. Please let me know what you think!
The nature of the gravitational properties of antimatter can potentially solve 3 of the big puzzles on physics- dark matter, dark energy, and the lack of observed antimatter in the universe.
If antimatter has a repulsive gravitation property, meaning that antimatter is repulsive to all types of matter, including antimatter itself, then it would naturally want to be the farthest away from normal matter- galaxies.
The theory is that antimatter is spread out through the intergalactic medium, in between galaxies. Antimatter is pushing galaxies apart, pushing them farther and farther from each other every day. Now of course local galaxies and clusters that are gravitationally bound will not feel a significant impact of this repulsive force.
Overtime, the space between these particles are increasing more and more. Particles of antimatter is essentially in an equally spaced lattice range pushing on other particles around it. This would cause expansion of the antimatter field between the galaxies, and push them apart
This force that pushes galaxies apart will also have a different impact on the galaxy, it will essentially squish it tighter and tighter. Now not only will galaxies be gravitationally attracted to the center of mass, but the outer regions of the galaxy will be repelled by the intergalactic medium pushing it to the center of mass located at the center of the galaxy. This force is essentially equivalent to the force of normal gravity and how it is felt on the galaxy is similar. The ordinary matter will be attractive, while the intergalactic space will be pushing the galaxy tighter and tighter.
Lastly, the proportion of matter and antimatter are equivalent. There is as much matter within the 100 billion galaxies plus all of the matter outside of galaxies, as there is the lattice of antimatter spread across all of the space in the universe.
I would appreciate comments on these ideas.