Before I start things I would like to say that I am not an expert in physics so I accept any criticisms.
Every celestial object in our universe is floating in space, what if they are not floating because there’s nothing there. We don’t know exactly what is outside our universe, what if outside our universe is a matter, the very first element. Einstein theories that the big bang was from a single matter. What if that matter is no alone maybe there’s an infinite amount of that matter connected by the kinetic particle theory of solid or solid like and the big bang occur because these matter are unstable.
Our universe is still expanding or maybe at the edge of the universe explosions occurs as the unstable matters hit each other by the force from the first explosion and explode. Also maybe the reason why the galaxies are being pulled apart not by dark energy but the gravitational energy of these matters. Now these matters surround our universe thus every galaxy in our universe is being pulled by the gravitational energy of these matters. You would think that why is the galaxy being pulled by the gravity if they cancel each other? But what if way beyond our universe is another universe, created by the same reason our universe was created. This other universes weaken some area of the gravitational energy of the matters as the mass of the matters decreases at the area where the other universe exists.
Now that’s a lot of what if and maybe but like I told you I’m not an expert in physics and I don’t know how to prove this but everything seems to fit. This theory is not to challenge any theory but I just want to put it. If you have any question please all comments is accepted even if you want to criticize.