What would happen if there was a shrinking universe

The energy of the universe does not obey Newton's laws, and only classical mechanics holds true under macroscopic, low-velocity, and weak gravitational fields.

The constant homogenization of energy is actually an increase in entropy, that is, the disorder becomes larger, and the universe becomes more and more chaotic, which is the most basic principle of nature, that is, the principle of entropy increase. If the entropy decreases, there must be an external force acting on the system, and the system becomes orderly, but the other systems become more disordered.

If the universe shrinks, the celestial bodies in it will converge on each other, and you say that "objects are expelled from space", the energy will be dissipated outward, which contradicts the energy accumulation. Now that the universe is in an expanding phase, the existence of gravity can prevent objects from being repelled from it, let alone shrinking the universe.

In addition, the protons and electrons of antimatter are also attracted to each other, because antiprotons have a negative charge and antielectrons have a positive charge. The matter that makes up the positive and antimaterial world is different, but the world behaves the same.

Newtonian mechanics, quantum mechanics, and relativity are three parallel systems of mechanics.

Newtonian mechanics (i.e., classical mechanics) applies to systems that we can generally see and feel.

Quantum mechanics is applicable in microscopic systems, i.e. at the atomic level.

The theory of relativity is applied to macroscopic systems, such as celestial bodies.

Therefore, the landlord's assumption is not valid, and Newtonian mechanics cannot be used to study the universe.

No, like you said antimatter, what about the current matter is antimatter? There is no law that explains such changes.

Take a look at Stephen Hawking's A Brief History of Time and The Universe in a Nutshell.

If all the matter in the world is antimatter, it will behave the same as what we see now, only because of the matter that makes up our world, we named it"Positive", relatively"Against".It's not that physical properties are also reversed.

The expansion of the universe constitutes time, and if the contraction is the opposite of time? This is one of my assumptions.

Who knows what Infinity will think.

As far as current theories and observations are concerned: the universe will expand forever!

Reason: The expansion of the universe is gradually accelerating, and the result according to Einstein's general theory of relativity is that the universe will expand indefinitely.

If the above observations are the macroscopic results of the universe as a whole and Einstein's general theory of relativity is correct, then the universe will expand infinitely!

The observation results are: most galaxies in the universe are accelerating away from us, and the average density of the universe measured within the observable range is less than the critical density of the universe (the critical density refers to the density when the universe is neither expanding nor contracting, reaching equilibrium), when the density of the universe is greater than the critical value, then the gravitational force between the matter in the universe will prevail, and the result is that the universe will shrink and collapse back to the original singularity due to the action of gravity! When the density of the universe is less than the critical density, gravity cannot bind the universe, and the universe will expand infinitely (similar to the principle of the earth launching satellites, when it is less than the first cosmic velocity, the satellite will eventually fall back to the earth, when it is equal to the first cosmic velocity, the satellite will revolve around the earth, and when it is greater than the first cosmic velocity, the satellite will be forever slippery and hungry and will not be able to return to the earth)!

In fact, the arbitrary evaluation of the ending of a science fiction ** is arbitrary in itself. It's like a sentence in the text: even if time is only two dimensions in the reborn universe, then it is also a two-dimensional coordinate system, and there are countless choices that can be made simultaneously in the plane.

The following is my arbitrary judgment.

1. The universe is actually destined to collapse, this is doomed. With the continuous discovery of the conscience of the owners of countless small universes (although they are reminiscent of Saint Seiya every time they see it, they are still faithful to the original), the expansion rate of the universe will become slower and slower. Before the universe reaches the point of collapse of mass, based on the widespread vision of the pastoral universe, more and more owners of the small universe will be forced to discover their conscience and return more and more mass to the large universe.

Unless the collapse limit of the universe is a positive sign that is infinitesimal for large scales or even small scales, the end of the universe can only be collapse.

2. The second criterion for judging the collapse of the universe is reincarnation - the reincarnation of the universe. It's like a widely agreed notion that humanity could not be the first and only civilization in the long history of the universe.

Then we must recognize that the previous universe that we were able to observe was not and will never be the first universe. Then the last cosmic collapse before the singularity of the universe was objectively existent, and the previous finite or infinite cosmic collapse and ** can continue to be introduced. At the same time, based on the same criteria, the technological level of the civilization that exists in this time dimension must not be the weakest in the context of infinite cosmic reincarnation, so the small universe before the collapse of the universe must also appear before the collapse of the universe countless times ago.

Countless collapses have happened before, why didn't this time happen?

Current observations and theoretical models suggest that the universe is expanding at an accelerated rate, rather than collapsing. Although the current evidence suggests that the universe is expanding at an accelerated pace, our understanding of the universe still has many limitations and imperfections. There are still many uncertainties about the evolution of the universe.

In the future, there may be new observations or theoretical breakthroughs that will allow us to re-evaluate the evolution of the universe.