Universe ? infinite/finite, belonging to bigger whole ?

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In summary, the conversation discusses the concept of multiple universes existing alongside each other, also known as the "multiverse" theory. The comparison is made to the surface of a sphere, where crossing the boundary would bring you to the other side. However, this is still a highly debated topic and there is currently no concrete evidence to support its existence. The conversation concludes by encouraging further exploration and questioning of the mysteries of our universe.
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JPC
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Hi

the idea of this post came from here
https://www.physicsforums.com/showthread.php?p=1760387#post1760387
I have browsed through some posts, but didn't really found what i was looking for, so i am making a new post here

/////

Could it be possible, that there be more than one universe, forming a bigger whole.
Like as we might see an atom as a particle, 'bigger entities' might 'see' a universe as a small particle. the idea, that we can always go higher in particle 'level' (level a : Quark / level a+1 : protons, neutrons, ect / level a+2 : atoms / ... / level a+n / level a + n + 1 / ...)

In the previous post :
malawi_glenn :
(our) universe is not infinite, it is finite but unlimited. Compare with the surface of a sphere in 3dimensions. It has a finite area, but it has no boundaries.

But with a sphere, we can draw boundaries, just like we do a world map. If you cross the boundary you end up on the other side on the map ?
is that what would happen in the universe ? crossing the edge would make u appear on the far edge ?
Or did i just didnt understand well what he meant ?
 
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Hello there,

Your idea of multiple universes forming a bigger whole is actually a concept that has been explored in theoretical physics. It is known as the "multiverse" theory, where there are multiple universes existing alongside each other. However, this is still a highly debated topic and there is currently no concrete evidence to support its existence.

As for the comparison with the surface of a sphere, your understanding is correct. In a 3-dimensional universe, we can imagine the boundaries of our universe to be like the surface of a sphere. Crossing the boundary would essentially bring you back to the other side, just like how crossing the International Date Line brings you to a different day.

But again, this is all theoretical and we are still trying to understand the true nature of our universe. As scientists, we constantly question and explore different ideas and theories, so your idea of multiple universes forming a bigger whole is definitely worth considering. Who knows, maybe one day we will have a better understanding of the multiverse and its potential existence.

Thank you for sharing your thoughts and keep on questioning and exploring the mysteries of our universe!


 

1. Is the universe infinite or finite?

The current scientific consensus is that the universe is likely infinite in size. However, this is still an area of active research and there are various theories that propose a finite universe.

2. How do we know that the universe is expanding?

Scientists have observed the redshift of light from distant galaxies, which indicates that they are moving away from us. This, along with other evidence such as the cosmic microwave background radiation, supports the theory of an expanding universe.

3. Does the universe belong to a bigger whole?

This question falls into the realm of philosophy and metaphysics, as it is not currently possible for science to answer. Some theories, such as the multiverse theory, propose that our universe is just one of many in a larger cosmic structure.

4. How old is the universe?

Based on observations of the cosmic microwave background radiation, the current estimated age of the universe is 13.8 billion years. However, this number may change as new data and theories emerge.

5. Will the universe ever end?

It is impossible for us to predict the future of the universe with certainty, but based on current scientific understanding, it is unlikely that the universe will ever end. It may continue to expand and change, but it is not expected to reach a point of complete destruction.

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