It's hard to find evidence of another universe.

   

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It's hard to find evidence of another universe.

Cosmology and quantum mechanics can give many answers to people, but those things cannot answer the questions of why we exist? Or they cannot answer questions about what is the purpose of our life? Is it try to find out the answer to that mystery what is greatest of all mysteries. Why we exist and what is the purpose of life? Things like why we are intelligent and why we are like what we are is a mystery, and that thing makes every kind of theory about things like our existence. But let's start to think about the multiverse theory.

There is no concrete evidence about the multiverse, and maybe we cannot ever get those evidence. The reason for that is that the gravity effect of those hypothetical other universes is so weak. And otherwise so stable. That means we cannot separate the gravity effect of other universes from the gravity effect of the objects what are inside our universe. The stars of those hypothetical other universes are so far away, that we cannot separate the light of those stars from the starlight of our galaxy.

If the universe is a ball, we might think that there is some kind of mass center in that ball. In theory, the universe rotates. The rotation speed of the universe is so low that we cannot ever observe the effect of other universes by using traditional methods of measuring gravity. If we are thinking that the great numbers of galaxies, which distances are billions of lightyears are orbiting some mass center. That movement is so weak that the direction of it is hard to measure. When that kind of gas masses are moving, it takes time if we want to describe the direction of the movement.

Normally gravity effect is measured by observing errors in the trajectories of the objects. But because the direction of gravity effect of those other universes is always coming from the same direction it doesn't curve the trajectories of the objects in our universe. The universe is so huge entirety, that all outside forces are hard to affect this entirety.

The idea of the rotating universe is forming because if there is the so-called hyper massive black hole in the center of the bubble the objects like galaxies should orbit that object. But there is no evidence about that object either. And the reason for that might be that the black hole sucked all material around it inside that monster. So that's why there is no radiation or material disk, what can uncover that object. But the fact is that we are not sure does the universe rotates or not. The fact is that the universe is expanding.

And we could try to measure the differences in the speeds of the galaxies when they are traveling away from the point of the big bang. But making that kind of measurement takes time, and there is the possibility that in the trajectory of the farthest galaxies of us is not another universe. So there is no way to notice those another universe at least an easy way.

https://www.scientificamerican.com/article/our-improbable-existence-is-no-evidence-for-a-multiverse/

Image: https://blogs.scientificamerican.com/observations/long-live-the-multiverse/

 https://curiosityanddarkmatter.home.blog/2021/01/11/its-hard-to-find-evidence-of-another-universe/