Wednesday, August 4

Is our universe a giant three-dimensional donut? | Digital Trends Spanish

The infinite would be nothing more than a spiral of multiple twists and turns where everything would be enclosed as in a great three-dimensional donut, that is the new concept of the universe that a group of astrophysicists from the University of Lyon are postulating.

It would be a specific way to measure the size of the universe, since its space would be closed and connected, “our entire cosmos could only be three to four times larger than the limits of the observable universe, about 45 billion light years away, “he said to LiveScience, the astrophysicist Thomas Buchert, from the University of Lyon, and the Center for Astrophysical Research in France.

To some extent, the theory of these Gallic astronomers is that the universe would be quite similar to a donut, it can even be explained with an example that is easier to understand:

Take a piece of flat paper. It is obviously flat, the parallel lines remain parallel. Now, take two edges of that paper and roll it into a cylinder. Those parallel lines are still parallel: The cylinders are geometrically flat. Now, take the opposite ends of the cylindrical paper and connect them. That makes the shape of a donut, which is also geometrically flat. “

The idea of ​​the connected universe also has its thesis in the idea of ​​the cosmic microwave background (CMB), a release of energy that was making the margins of this kind of folded or donut paper grow, generating a maximum size of disturbances that would give the universe this topology.

“The properties of the observed CMB fluctuations then show ‘missing power’ on scales beyond the size of the universe.” A missing power means that fluctuations in the CMB are not present at those scales. That would imply that our universe is connected to multiple, and finite, on that size scale. We can vary the size of the space and repeat this analysis. The result is an optimal size of the universe that best matches the CMB observations. The answer to our article is clearly that the finite universe matches the observations better than the infinite model. We could say: Now we know the size of the universe, ”says Buchert.

Which also means that the idea of ​​making a round trip around the universe and returning to the place of origin is not correct, since the universe is constantly expanding within this 3D donut.

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