Depuis des années, les astronomes sont à la recherche de la mystérieuse Planète 9, un monde géant caché aux confins de notre système solaire. Les scientifiques ont remarqué des mouvements étranges dans les orbites d'objets lointains, suggérant qu'il y a quelque chose de grand là-bas. Maintenant, grâce à des télescopes avancés et à des analyses du ciel alimentées par l'IA, nous sommes plus proches que jamais de la trouver réellement ! Si la Planète 9 existe, elle pourrait être plusieurs fois plus grande que la Terre et pourrait même aider à expliquer des mystères cosmiques étranges. Imaginez découvrir une toute nouvelle planète juste dans notre propre arrière-cour ! Restez à l'écoute, car la chasse s'intensifie enfin ! Animation créée par Sympa. ---------------------------------------------------------------------------------------- Musique par Epidemic Sound https://www.epidemicsound.com
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00:00Have you ever heard of the new planet? No, this is not Pluto, we are talking here about a mysterious star that entered the confines of the solar system, a hypothetical planet whose existence remains to be confirmed.
00:13Researchers have been tracking it for years, and today, it seems that they have finally found a key element to unveil this mystery. Will this unspeakable planet eventually reveal its secrets? Let's take a closer look.
00:25The new planet is a hypothetical celestial body that evolved in the most remote regions of our solar system. For several years, astronomers have been trying to locate it. However, its unspeakable character has only allowed them to identify a few of its potential characteristics.
00:42What we know is that the new planet would be huge, potentially up to ten times larger than Earth. A colossal planet. It would also be a lonely traveler, evolving on the periphery of our solar system.
00:58According to some scientists, the new planet could be a mini-Neptune, with a dense and gaseous atmosphere, as well as a rocky core. Others advance the hypothesis of an icy super-Earth, covered with a solid and frozen surface, under a thick envelope of hydrogen and helium gases.
01:18Obviously, since its very existence remains to be proven, it is impossible to say with certainty what it looks like. Perhaps it is only a myth, like the little mouse or the Easter bunny, but for some astronomers, there is no doubt that it is indeed somewhere, waiting to be discovered.
01:35Basically, nothing allows us to say that the new planet is really a planet. It could be a black hole of a particular type, or even an object made entirely of black matter.
01:46The quest for the ninth planet began at the beginning of the 21st century, when astronomers observed an anomaly in the most remote regions of our solar system. They observed that some distant celestial bodies, called trans-Neptunian objects, adopted unexpected trajectories, defying established models.
02:06Trans-Neptunian objects, or OTN, could be compared to these products forgotten at the bottom of your refrigerator for years. These are small icy stars, which gravitate within the belt of Kuiper, well beyond the orbit of Neptune.
02:20By studying these objects, scientists noticed unusual behaviors. First perceived as simple anomalies, these irregularities ended up arousing suspicions. And if a ninth planet, still invisible, exerted a gravitational influence on them, this was not the first time such a hypothesis arose.
02:38As early as the 19th century, similar research had been carried out to find a supposed planet X. This time, however, astronomers had much more advanced technology, and a more playful spirit. They called their hypothetical planet, Planet 9. A name considered more seductive than Planet X.
03:00Some even launched the hashtag, GEOPLUTOLIVES, in reference to Pluto's displacement, and the will of some researchers to find a new planet to fill this void. However, identifying Planet 9 turned out to be a real challenge.
03:14It's a bit like trying to find a missing sock in a laundry basket, as vast as a football stadium. Too distant and too dim to be detected directly, it escapes the most powerful telescopes. Astronomers therefore had to rely on indirect clues, such as the disturbed orbits of the OTN, to try to locate its location.
03:36Some even suggest that it could be a missing planet, escaped from another system, which would explain why it remains so unsightly. But they did not give up. Today, researchers are still scrutinizing the sky, relying on high-tech telescopes and sophisticated algorithms to track this mysterious planet.
03:55And you can have hope, dear astronomy enthusiasts. Because after years of research, it seems that we have finally found the key to this mystery.
04:04Dr. Man Ho-Chan, an astronomer from the Hong Kong University of Education, proposes a theory. Planet 9 would not be content to wander alone. It could be accompanied by a real moon cohort.
04:16It would therefore be not only a huge planet, carpeted in the depths of space, but also an inveterate collector. In the external solar system, the moons are common currency. In fact, almost all the planets located beyond the main belt have at least one, with the exception of Mercury and Venus.
04:36The Earth, with its only satellite, seems poorly equipped in comparison. Even Pluto, retrograded to the rank of dwarf planet, has several moons. Admit that it is a bit unfair.
04:47Keeping this in mind, let's go moon hunting with Planet 9. The area located between the belt of Kuiper, saturated with rock debris, and the cloud of Oort, where this planet is supposed to hide, seems to be a suitable land for harvesting.
05:01According to Chan's calculations, it would be even stranger that this unobtainable planet is not a satellite. According to his estimates, a mass star of Planet 9 should have captured at least twenty trans-Neptunian objects, about 150 km in diameter.
05:18In other words, if this planet exists, it could be surrounded by a swarm of small moons. We could believe that it is playing a cosmic version of Pokemon by capturing its small celestial bodies.
05:29But beyond the playful image, the presence of these moons could provide us with precious clues to finally locate this unobtainable planet.
05:37One question remains. How to locate these tiny satellites? It is not as if one of them could wave a flag or spread a piece of Beyoncé to attract our attention.
05:47However, there is a very real phenomenon that could help us. The heating by tide.
05:53Heating by tide could evoke a new fitness fashion. But it is actually a very real scientific phenomenon.
06:01It occurs when two celestial bodies evolve close to each other. Tides are not limited to the movement of the ocean.
06:09They also result from gravitational forces that are exerted unequally on a planet or a moon.
06:16When one of these stars orbits close enough to its companion, their respective gravitational forces slightly deform them, giving them a silhouette reminiscent of a football.
06:27By rotating one around the other, these variations of shape generate internal friction, thus producing heat.
06:34Impressive. Who would have thought that the new planet could follow a routine of exercise?
06:39We should perhaps start calling it rather Planet Gym.
06:43Anyway, if the new planet has moons, their gravitational attraction would constantly change its shape, thus generating heat.
06:51And we could perhaps detect this mysterious planet thanks to the heat produced by these moons, even if they emit no other signal.
06:59Before rejoicing too quickly, know that finding them will not be easy. They are tiny and located at an incredible distance from us.
07:07But hey, discovering something important is never easy, is it?
07:12Scientists remain confident that with the appropriate technologies, they will succeed in detecting this revealing signal.
07:18Thanks to sophisticated instruments such as the Large Antenna Network, Millimetric, Submillimetric, ATACAMA, PAN-SARS, or the future Large Telescope of Synoptic Studies, it will be easier for us to locate them.
07:34Choice allies, isn't it?
07:36And if we manage to detect this thermal signature, it could finally confirm the existence of the new planet.
07:42Of course, the process will be long and arduous, but the reward could be worth it.
07:48Finding this planet could explain a large part of the strange behaviors observed among trans-Neptunian objects in the Kuiper Belt and beyond.
07:56As we have already pointed out, they have recently adopted bizarre behaviors, tilting and aligning in a strange way.
08:03All this could result from the gravitational attraction of the new planet.
08:07But if this planet does not exist, we will still need to find an explanation for this behavior.
08:12The search for the new planet is undoubtedly one of the most exciting and fascinating adventures of contemporary astronomy.
08:20It's a bit like a cosmic treasure hunt, and everyone is invited to participate.
08:26So, grab your telescopes and let's start looking for this planet.
08:32Who knows, maybe we'll find it sooner than expected.
