Notre Univers Porte des Cicatrices qui Pourraient Rendre le Voyage Temporel Possible

Sympa

Saviez-vous que notre univers possède des cicatrices qui pourraient détenir la clé du voyage dans le temps ? Ces cicatrices cosmiques, appelées cordes cosmiques, sont d'énormes fissures invisibles dans l'espace-temps laissées par l'univers primordial. Les scientifiques croient que si nous pouvions les trouver et les comprendre, elles pourraient révéler des moyens de plier le temps lui-même ! Certaines théories suggèrent même que voyager le long de ces cordes cosmiques pourrait nous permettre de sauter entre différents moments de l'histoire. Cela ressemble à de la science-fiction, mais des physiciens de premier plan prennent cela au sérieux. Si ces cicatrices existent réellement, elles pourraient modifier tout ce que nous savons sur le temps et l'espace !  Animation créée par Sympa. ---------------------------------------------------------------------------------------- Musique par Epidemic Sound https://www.epidemicsound.com   Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna​ ---------------------------------------------------------------------------------------- Nos réseaux sociaux : Facebook: https://www.facebook.com/sympasympacom/ Instagram: https://www.instagram.com/sympa.officiel/  Stock de fichiers (photos, vidéos et autres): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ----------------------------------------------------------------------------------------  Si tu en veux encore plus, fais un tour ici:  http://sympa-sympa.com

Transcript

00:00Guess what? The universe can, like your skin after a bike fall or my fingers when I try to peel potatoes,

00:07carry real scars. This is why, before the Big Bang, it was of a density and an extreme temperature saturated with energy.

00:15Everything seemed stable until an upheaval occurred about 13.8 billion years ago.

00:21Then, a colossal explosion occurred, after which the universe spread at a dizzying speed,

00:27far exceeding what we are capable of apprehending.

00:31Over time, it started a cooling process, and it was then that huge scars,

00:37real tears of space-time, began to appear.

00:41The study of these marks could even offer us clues about the possibility of time travel.

00:46Today, these scabs bear the name of cosmic ropes.

00:50They look like scabs that form when the skin stretches too quickly, or cracks that strip the ice under the effect of ice.

00:58These ropes are probably of extreme finesse, of the order of the proton, a positively charged subatomic particle.

01:05And yes, subatomic means what is smaller than an atom.

01:09These ropes, of phenomenal density, can stretch over several light years.

01:15Imagine now these cosmic scars drifting in space, almost indifferent to what surrounds them.

01:22When two cosmic ropes cross, they could alter space-time to the point of generating a real time machine.

01:29By following a precise path around these structures, you could return to your starting point even before you left,

01:36thus making a journey into the past.

01:39Let's face it, this idea seems to come from a science fiction novel.

01:42However, it is based on the theory of ropes, and the calculations that accompany it seem solid.

01:47Alas, no observation of these structures has yet been made, which makes, for the moment, a simple hypothesis.

01:55In 1991, physicist John Richard Gott advanced that cosmic ropes could make time travel possible.

02:03If two infinite ropes moved parallel to each other, they would distort space-time to the point of creating a time loop.

02:10Such a loop would allow to go back to the past.

02:13Even better, this idea does not contradict Einstein's general relativity, which establishes that massive objects can curve space and time.

02:21These distortions could act as temporal shortcuts.

02:25And his now famous concept of closed time loops also helps explain the potential operation of glass holes.

02:32A glass hole is essentially, at least in theory, a tunnel connecting two distinct points in space.

02:39Some think that these passages could allow to considerably reduce cosmic distances, making interstellar travel otherwise unimaginable possible.

02:49Let's assume that you managed to create a glass hole and propel one of its ends at a speed close to that of light before bringing it back to its original point.

02:59Once this movement was made, the two ends would no longer be synchronized.

03:04One would end up in the past, the other in the future.

03:07And if you found a way to cross this tunnel, you would move in time.

03:11Another approach would be to place one end of the glass hole near an intense gravitational field, like that of a black hole, while the other would remain in a region with lower gravity.

03:24According to the theory of relativity, time would flow more slowly from the side subjected to strong gravity,

03:30which would allow a particle or object to remain in the past compared to the other end of the glass hole.

03:36On the other hand, creating a glass hole could prove to be a dangerous undertaking.

03:41It could collapse without warning, emit intense radiation or contain toxic exotic matter with which any contact would be extremely risky.

03:50Let's go back to the mathematical basis of time travel by cosmic rope.

03:54Although these calculations hold up, this does not mean that this type of time travel machine is feasible.

04:01Such a journey would require reaching a speed close to that of light.

04:06An exploit can be out of reach.

04:08Indeed, according to Einstein's relativity, the faster an object accelerates, the more energy it requires.

04:14However, our current technologies are far from being able to provide the energy required for such an acceleration.

04:20The very idea of two infinite cosmic ropes is also a problem.

04:24In practice, it is impossible to create an object of infinite length.

04:28Even if this time travel model is mathematically feasible, its concrete application seems completely unrealizable.

04:35Nevertheless, some researchers still consider cosmic ropes as a more credible option than glass holes.

04:41Whatever it is, before considering time travel, we must first prove the existence of cosmic ropes.

04:48Fortunately, astronomers try to detect low-frequency gravitational waves by analyzing the signals emitted by pulsars,

04:56these stars that send regular radio impulses.

04:59By observing slight deviations in their timing,

05:02scientists can detect subtle disturbances in space-time induced by these gravitational waves,

05:08real undulations of the universe.

05:10So far, the only gravitational waves detected come from black holes.

05:15However, in 2020, an unusual signal distinguished itself from the known emissions of black holes and could well be linked to cosmic ropes.

05:23This is where the theory of ropes comes into play.

05:26According to it, the universe is not limited to the four dimensions of space and time.

05:31There would be other dimensions, invisible to our eyes.

05:34In addition, the elementary constituents of the universe would not be simple particles, but tiny ropes in vibration.

05:41By oscillating at different frequencies, these ropes would generate various fundamental particles.

05:47These filaments could have stretched over the first moments of the universe and gave birth to the cosmic ropes we have talked about.

05:55In the coming years, a space telescope designed to detect gravitational waves,

06:00named LISA, could provide us with new data on their subject.

06:04Its launch is scheduled for 2035.

06:07But if the signals captured in 2020 really came from cosmic ropes,

06:11it would mark a revolutionary advance in physics.

06:14Such a discovery would confirm the theory of ropes as a fundamental framework for understanding the universe,

06:20radically transforming our perception of the constitutive elements of reality.

06:25On the other hand, even if these signals did not turn out to be linked to cosmic ropes,

06:30their analysis would remain crucial.

06:32It would allow scientists to better understand what future signals from cosmic ropes could look like.

06:40And, although we are still far from time travel,

06:43the confirmation of the existence of cosmic ropes could bring us a little closer to understanding the mysteries of the universe,

06:50or even, one day, the possibility of traveling through time.

06:54Time travel is a concept widely explored in science fiction.

06:58But in reality, moving forward in the future happens naturally.

07:02In that very moment, you progress towards the future at a constant rate of one second per second.

07:07However, scientists have discovered that this rate can vary depending on the speed and gravity.

07:13Einstein's theory of restricted relativity shows that the faster an object moves, the slower time for it.

07:20As it approaches the speed of light, time flows much slower for it than for a motionless person.

07:26As for general relativity, it introduces another determining factor, gravity.

07:31The more intense the gravitational attraction, the slower time.

07:35Near massive objects such as a neutron star, a black hole or even the Earth,

07:40the flow of time is slower than in areas far from these celestial bodies.

07:44If a person remained just at the limit of a black hole, where gravity is extreme,

07:49it would only live a few hours, while on Earth, thousands of years would pass.

07:54Returning, it would have made a real journey to the future.

07:58This phenomenon, far from being speculative, is a real and rigorously demonstrated effect by science.

08:04A concrete example of time travel, although on a small scale, can be observed in space missions.

08:10The cosmonaut Sergei Avdeyev, who spent a total of 748 days on board the Mir station during 3 distinct missions,

08:18aged 0.02 seconds less than if he had stayed on Earth.

08:23Due to the considerable speed of Mir compared to our planet,

08:27time travel occurred, thus illustrating that the flow of time depends on speed and location.

08:34However, if projecting oneself into the future is a scientific reality,

08:39going back in time is a whole other challenge, much more complex and subject to controversy.

08:44This idea generates logical paradoxes.

08:46Let's take the example of a billiard ball sent into a time machine.

08:51It reappears in the past and hits its younger version, thus preventing it from entering the machine in the first place.

08:58A blatant contradiction.

09:00Oops, too many calculations.

09:03My head is starting to hurt.

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