The End of the Material Universe
This universe is expanding with the expansion speed being accelerated.
The accelerating universe is the observation that the universe appears to be expanding at an increasing rate. In formal terms, this means that the cosmic scale factor a(t) has a positive second derivative,[1] so that the velocity at which a distant galaxy is receding from us should be continuously increasing with time.This universe will continue to expand to the infinite size at a rate close to light. Every material in it, including a proton, will be disintegrated to become only quarks, electrons, and other particles without internal structure.
http://en.wikipedia.org/wiki/Accelerating_universe
However, when the size of this universe becomes almost infinite, the density of mass or material energy will become almost zero. It means that when almost infinite time has passed there would be almost no physical entity in any finite cubic volume in the universe.
But the structure of space and time of the universe was built with material energy and substances in it. The framework of the universe, time and space, has been balanced existence of material energy and substances. So, if the universe has lost this balance due to its expansion to an infinite size, this framework itself must lose stability, though it is dynamically getting larger and larger. Then what would happen to this universe running almost out of control?
One image is that it will be tore up into uncountable parts. And each of these parts will be also split into zillions of parts, repeatedly. Finally, every part would become almost zero in the size. Eventually, they will return to naught or to the state before the emergence of this universe from the sheer vacuum.
Another image is that the whole university in the size of the almost infinite would suddenly disappear as a whole. In an accelerated velocity to the light speed, the whole universe would get across a boundary beyond which no system of time and space linked with material energy can exist. So, as a system of time and space, the universe would be lost suddenly without any impact on anything. Even in this case it returns to the sheer vacuum.
In either case, the universe is growing, at an accelerating rate, toward the infinite size only to become nil.
But why is this universe expanding toward the infinite?
To grasp an image of the underlying law, we have to refer to an inverse-square law that governs almost every physical phenomenon in this universe.
In physics, an inverse-square law is any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity. In equation form:
Intensity = 1/(distance)^2
The divergence of a vector field which is the resultant of radial inverse-square law fields with respect to one or more sources is everywhere proportional to the strength of the local sources, and hence zero outside sources. Newton's law of universal gravitation follows an inverse-square law, as do the effects of electric, magnetic, light, sound, and radiation phenomena.
The lines represent the flux emanating from the source. The total number of flux lines depends on the strength of the source and is constant with increasing distance. A greater density of flux lines (lines per unit area) means a stronger field. The density of flux lines is inversely proportional to the square of the distance from the source because the surface area of a sphere increases with the square of the radius. Thus the strength of the field is inversely proportional to the square of the distance from the source. http://en.wikipedia.org/wiki/Inverse-square_lawIf the above formula is inverted:
1/Intensity = (distance)^2
If the speed of the expansion of the universe is proportional to a reciprocal factor of some intensity that is expressed with (distance)^2, the more the universe gets larger, the faster it expands.
Probably there is an interface between our material universe and the outer vacuum at any moment. When the size of the universe becomes twice larger, its energy intensity gets twice smaller. It means that the universe gets diluted twice. It also means that the universe is closer to vacuum, resulting in easier invasion to the vacuum outside the universe. Conversely, when the energy intensity of the universe is large, it cannot penetrate into the vacuum or expand to the vacuum easily, since the properties of the two worlds are so different.
In other words, the more this universe becomes akin to the vacuum, the more the universe can advance to the vacuum. The vacuum, unlike its image, must show stronger resistance against material energy, while it does not stand strongly against weak material energy.
It might have some analogy to the situation that an iceberg cannot well expand in the sea, but when it is melted or broken to uncountable pieces of small ice, they can well penetrate into the sea as far as possible till each ice piece becomes finally water.
If this theory is correct, we were truly born from the vacuum and are expanding and advancing to become vacuum again.
But what is outside the vacuum that is outside our universe? Probably a design of God.
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Luk 9:22 Saying, The Son of man must suffer many things, and be rejected of the elders and chief priests and scribes, and be slain, and be raised the third day.