We are going to explore the repulsive nature of gravity. Here you can see how matter fits into space-time. So we can jump into the video. First, we can check what we know about gravity.
For gravity, we have two important theories. One was presented by Isaac Newton and the other was by Albert Einstein. Newton proposed in his theory, that gravity as a pulling force. Einstein proposed gravity as the curvature of space-time caused by mass and energy. In his theory, I perceive gravity as an attractive force in space-time. In his equation, he showed us the curvature of space-time on the left and the distribution of energy on the right. Every activity in our universe depends on the energy distribution in space-time. All objects in the universe interact with each other by gravity. So gravity must be a force of attraction or repulsion. Newton shows us gravity as an attractive (pulling) force. Both of these theories explain the gravity of a system. In any mode of any theory, we cannot say gravity is not a force. One can say gravity is the curvature of space-time caused by mass and energy, according to the General Relativity Theory. But the inner meaning of this theory states gravity as a force.
SO we can see how space-time and energy interact in the universe. To understand the universe, we must first understand how energy exists in space-time. For that, we need the ideas of Albert Einstein. Energy is located in space-time in the same pattern he used to describe gravity. So I wish to explain the concept of curved space-time in the general relativity theory that I understood in my observations, in a way that everyone can understand. In my vision, space-time in General Relativity is flexible. The flexibility allows the space-time to fold (Curve), following the effects of the energy distribution on it. Thus energy can pull space-time closer to it from all of its sides. This energy can hang in the space-time which it has pulled into it. Thus energy and space-time are always subject to interact with each other. For a better understanding of this theory, you can imagine space-time as the surface of an ocean. Imagine that you are traveling in a boat, in this ocean. You can observe everything in general relativity, at the ocean. There are waves, the curvature of the surface of the water by the mass of the boat, the shape of a vortex that we can compare to the event horizon of a black hole, and much more. We can have a very clear view of Einstein’s space-time concept from the ocean’s surface. We can see that the surface of the ocean is flat. So I would like to say it is a two-dimensional surface. We know, that the mass of the boat can create a curvature at the surface of the ocean. When we are having this scenery, we are having the vision of a three-dimensional effect in a two-dimensional space-time. Now imagine that the boat is sinking into the ocean. Here we can observe the three-dimensional space-time of the ocean and all the parts of the boat are under the curvature of the ocean. In a flat Space-time Einstein’s Theory of General Relativity is giving us a three-dimensional vision of a two-dimensional space-time. we are having an extra dimension here.
When you are in the boat, you are adding your mass to the boat and it is applying the total mass to the surface of the ocean to create the curvature according to the total mass. Here the bottom of the boat is having direct contact with the surface of the ocean while you are not related to the surface of the ocean directly. Same as, when a spherical mass is acting with a two-dimensional flat space-time to create a curvature in it, the bottom part of the sphere is having only direct contact with space-time. The upper part of the spherical mass can’t create a curved space-time. Imagine that you have a sheet of paper and a small ball in your hand. You are trying to wrap the ball with this sheet of paper; you can wrap the ball, but can’t do it perfectly because the paper will create some folding while it curves according to the ball. When the spherical ball or the boat sinks in the ocean water, there we can have a three-dimensional space-time and it can easily wrap the spherical ball or the boat. If we ignore the gravity of the earth in this system (ocean) the ball will not move to the bottom of the water, somewhere in the water it can create a sufficient place. This is what is happening in space-time. Like this, all the objects in the universe, including our earth, exist in a state wrapped by space-time. Energy, from all its dimensions, bends space-time into it and hangs on it. There is now a general understanding of the interrelationship between space-time and energy. This condition is the cause of gravity.
Picture: Space-time curvature. Here we can see two pictures. The first shows that energy is dragging space-time into it, from all its dimensions. The second is an imagination of the quantum universe. Here we can see that a mass is located inside a bubble. Here we can see this bubble as space-time and the sphere inside it as energy.
In my opinion, gravity is an attractive force but a repulsive force at a distance. A mass can remain in space-time by hanging in curved space-time. This is the reason why gravity is repulsive to distance. With the help of the curvature of space-time, any mass can create an orbit in the curved space-time of a massive object. Each mass can create its own curved space-time. We know that the distortion of space-time leads to the free fall of an object to another gravitational field. Increasing the size of the mass will decrease the distortion field length and the decreasing size of the mass will increase the distortion field of a mass. Black holes are the best examples of this phenomenon. Now we know that each mass has its own curved space-time and space-time distortion length. Here we can see that time is flexible to any dimension with the direction of the force. Energy is always concentrating on the center of the system and gravity is spreading around it. There it can create only an identical space-time with all the directions. Gravity is holding space-time to the center of the mass and a mass can freely stay in space-time. In this geometry, gravity allows the mass to hang in space-time. It is revealed here that space-time is holding a mass in it by the effect of gravity.
Picture: Gravitationally curved space-time. This picture shows us how a mass can hang in a flexible space-time.
I can present a model of the solar system, to illustrate how other objects remain in the curved space-time of a massive object. Every mass has its own gravitational field, so we can say every mass in space-time can create a curvature in space-time. We can imagine our solar system and we know that it is a complex gravitational system. The major part of the mass of our solar system is concentrated in the sun, and all the planets orbiting the sun. So like the sun, every planet can create a curvature in space-time, according to its mass (energy in it). Up to this point is explained in General relativity. In my concept according to the above picture, mass is hanging in space-time by curving it by gravity in all dimensions. At this stage, we can say that the planetary motion around the sun is due to the curvature of space-time. In the system, the sun is curving space-time to the direction of the solar mass and the earth is curving space-time to its direction. So we can see that those two space-times are curving in opposite directions. Two different curved space-time in the opposite direction can create an orbit around the stronger space-time. But the position of the earth is inside of the curved space-time of the sun. So inside the curved space-time of the sun, Earth is creating another curved space-time towards its position. In the same manner, the moon is creating a space-time inside the curved space-time of earth. This system allows even smaller objects, like asteroids to orbit the sun in space-time. We know in our solar system, Jupiter is the biggest planet and Pluto is the smallest, but Pluto is orbiting the sun even if it stays away from Jupiter. So even if the Earth’s position has been changed in the solar system, it can orbit the sun. Here we can see, how gravity is creating a repulsion between two masses. Actually, the curvature of space-time in opposite direction is causing this repulsion. To get a better experience, here we can imagine the above picture: A gravitational system.
Picture: Gravitational system. This image represents the position of the Earth in our solar system. In the picture, the Earth has located within the Sun’s curved space-time. But the space-time curvature that the earth itself creates is in the opposite direction. Afterward we can develop the idea of the repulsive nature of gravity from it. Similarly, the Moon creates its own space-time within Earth’s space-time. If we fully understand the properties of gravity, we can swim in it just as a swimmer can swim freely in the water.