Is there an end to the universe, and what is beyond the end?

Einstein's explanation for this question is that the universe is bounded and infinite, while Hawking believes that the universe is finite and unbounded, and I personally believe in Hawking's view of the end of the universe. In addition, as for what is beyond the end of the universe, I think this is unknowable, no one can know what is beyond the end, and we don't even know where the end is, how can we know what is beyond the end.

Mainstream scientists now agree that the universe is finite and unbounded, just like the earth we live on. The sphere of the earth we live in is finite, but we cannot find its boundaries, and the same is true of the universe, except that we have gone from two-dimensional unbounded to three-dimensional unbounded. In other words, if we only set out at a certain point and keep moving forward, it is possible to return to the same place.

Even if the universe is finite, we still can't observe the whole universe, because the scale of the universe is larger than we imagine, so in fact, the exploration of the end of the universe is of little significance to us now, and it is a very distant future. Whether the universe is a plane or a saddle or a sphere, it is the same for us, we live on the surface and not inside. Of course, there are also those who think that what we are seeing so far is wrong, that we are observers within the dimension, limited by the dimension so that we cannot see the truth.

According to some evidence currently available, it can be proved that the universe has been expanding outward after the big **, and the speed of expansion has begun to slow down slowly, because the universe is finite, when it expands to a certain extent, it will collapse inward. This point is mentioned in "The Three-Body Problem", the pastoral era of the universe has long passed, because many people secretly steal mass from the universe, causing the universe to collapse from the original outward expansion to inward collapse, so all civilizations in the universe will be called on to return the mass to restart the universe and let the universe return to zero.

At present, there is no end to the scope of the universe known to mankind, and human beings have not yet explored the boundaries of the universe, but I think that if there is an end to the universe, there should be another world beyond the end.

Whether there is an end to the universe is a question that is always being explored, and no one can give a definite answer to whether the universe has an end or not. So no one has seen anything outside of the end.

It is not certain whether there is an end to the universe, and with the current technological capabilities of human beings, there is no way to survey the end of the universe and know what is outside the end of the universe.

No.

According to the Standard Model of cosmology, the universe is not infinite, but about 13.8 billion years. On the other hand, the observable universe is about 93 billion light-years in diameter. So, does that mean 46.5 billion light-years away is the end of the universe?

The answer is no. We can only see objects as far as 46.5 billion light-years away when we look in any direction on Earth. But the edge of the observable universe is only the limit of what we can observe at the moment, not the edge of the universe.

Since the universe exists for a finite amount of time, and the speed of light is not infinitely fast, there is still a part of the universe that we cannot observe now, and the light there does not have enough time to complete the journey to Earth.

At present, it is impossible for humans to know the exact size of the entire universe, and it is unknown whether the unobservable universe is finite.

If the universe were infinite, there would be no end to the universe. If the universe is finite, there is not necessarily an end to the universe. As for whether there is an end to the universe and what is beyond the end of the universe, it is necessary to figure out what the geometry of the universe is.

The geometry of the universe is determined by the matter (ordinary matter and dark matter) and energy (photons, neutrino radiation and dark energy) in the entire universe, and the magnitude of the mass-energy density affects the curvature of space-time. According to the Friedman equation, a critical density can be calculated.

The universe is finite and unbounded, just like a balloon, we are inside the sphere, the space of the sphere is limited, but we can never go to the end in it, just like walking on the surface of the earth can never reach the edge.

Flying in the universe, even if you have reached the farthest point of the universe, you cannot fly out of the universe, because space is distorted, even if you keep flying in one direction, in distorted space, the flight path looks curved from other spaces, and it flies around the farthest part of the universe. Flying inside the universe, no matter which direction you go, will eventually return to the starting point.

At present, scientists can observe the universe of 13.4 billion light years, and they put forward three major conjectures, the first multidimensional universe, Hawking believes that there are countless universes outside our universe; the second void space, the universe is expanding at a speed beyond light, beyond the reach of human beings; In the third life space, we may be the internal blood meridians. Follow me and take you to explore the world in the next issue.

From the perspective of the theory of the universe, the universe came into being from nothing, and according to the theory of the present world, the universe is still in infinite expansion, and there is no end to it. Limited to the current understanding of mankind, you have basically no solution to this problem.