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00:00:00

The question of what is beyond the universe , representatives of the human race have been

00:00:05

asking themselves for centuries . But an approximate understanding of what our cosmic home is has

00:00:10

appeared quite recently.

00:00:11

Today we know that the universe was born about 14 billion years ago as a result of the Big

00:00:15

Bang , and since then it has been expanding with acceleration , cooling down in parallel

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. It seems to contradict common sense , but to understand the amazing laws of the cosmos

00:00:28

and how they work , the smartest of us have worked for generations . But the knowledge

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accumulated over the years, alas , still does not allow you to put the puzzle together . Yes

00:00:40

, we know what the observable universe looks like . with the help of the most powerful

00:00:47

telescopes , scientists map not only stars , but also billions of galaxies and their

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clusters , looking further and further into the past , up to the Big Bang . But can they

00:00:56

find out if there is something beyond our universe?

00:00:59

Is there anything out there where it is not only impossible to send the most powerful

00:01:05

tools, but also simply look?

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Even if the universe is a formless, nameless void – an absolute nothing – it is still

00:01:17

something and is included in the list of "everything that exists" - and therefore, by definition,

00:01:26

is part of the universe.

00:01:27

If the universe is infinite in size, then there really is no need to worry about this

00:01:35

puzzle.

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The universe, being all that is, is infinitely large and has no edge, so there is nothing

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"external" to talk about.

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On the other hand, of course, there is the outside of our observable portion of the universe.

00:02:02

Space is old and light is spreading fast.

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Thus, in the entire history of the universe, we have not received light from every single

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galaxy.

00:02:10

Currently, the width of the observable universe is about 90 billion light-years.

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And, apparently, there are billions of other random stars and galaxies beyond this boundary.But

00:02:17

is there anything beyond that?

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Cosmologists aren't sure if the universe is infinitely large or just extremely large.

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To measure the universe, astronomers instead look at its curvature.

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A geometric curve on a large scale of the universe indicates its general shape.

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If the universe is perfectly geometrically flat, then it can be infinite.

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If it is curved like the surface of the Earth, then it has a finite volume.

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As he writes in the article for Space.com Astrophysicist Paul Sutter, current observations

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and measurements of the curvature of the universe show that it is almost perfectly flat.

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You might think that this means that the universe is infinite, but it's not that simple.

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Even in the case of a flat universe, the cosmos does not have to be infinitely large.

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"Take, for example, the surface of a cylinder.

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It is geometrically flat because parallel lines drawn on the surface remain parallel

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(this is one of the definitions of "flatness"), and yet it has a finite size.

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The same can be said about the Universe: it can be absolutely flat, but closed in itself,"–

00:03:19

Paul Sutter, astrophysicist at SUNY Stony Brook and the Flatiron Institute in New York.

00:03:23

But even if the universe is finite, this does not necessarily mean that there is an edge

00:03:30

to it somewhere.

00:03:31

Perhaps our three-dimensional universe is embedded in some larger multidimensional structure.

00:03:39

This is completely normal and is indeed part of some exotic physics models.

00:03:51

But at present, scientists have absolutely no way to verify this.

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