Les scientifiques viennent de faire une découverte incroyable : une possible étoile de matière noire au sein même de notre galaxie ! Contrairement aux étoiles normales, celle-ci pourrait être alimentée par la mystérieuse matière noire au lieu de la fusion nucléaire. Si c'est vrai, cela pourrait bouleverser tout ce que nous savons sur l'espace et le fonctionnement de l'univers. La matière noire est quelque chose que nous ne pouvons pas voir, mais elle constitue la majeure partie de l'univers, et cette étoile pourrait enfin nous aider à la comprendre. Les astronomes sont toujours en train de l'étudier, mais cela pourrait être l'une des plus grandes découvertes spatiales jamais réalisées. Restez attentifs, car l'univers vient de devenir beaucoup plus mystérieux ! Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
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Nos réseaux sociaux :
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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
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FunTranscript
00:00Scientists have discovered an invisible star nestled in the heart of the Milky Way,
00:05a star that played a key role in the birth of our galaxy.
00:09Situated 26,000 light years away, in its center,
00:12a massive and imperceptible object began to spread everywhere
00:16and wanted to invade it at every moment without even realizing it.
00:19It all began in the 1970s,
00:21when an astronomer named Vera Rubin started studying the galaxy of Andromeda.
00:26Her goal was to check if the stars were following predictable trajectories.
00:31Imagine that you were spinning a ball at the end of a string around you.
00:35The closer it is, the faster it turns on a reduced orbit.
00:39Conversely, if you release the string, the ball slows down and describes a wider circle.
00:45This is the fundamental principle of gravity.
00:47It is the same for planets.
00:49Those that gravitate near the sun, like Mercury,
00:52travel in their orbit in just a few months,
00:55while those furthest away, like Neptune and Saturn,
00:58take several decades to complete their evolution.
01:01The stars should therefore follow this same pattern by orbiting around the center of their galaxy.
01:06The closest ones move quickly, while those located on the periphery should slow down.
01:12However, when Rubin measured their speed, she made a disturbing discovery.
01:16These stars did not slow down.
01:19Distant stars were moving at a speed comparable to those near the center.
01:23Logically, these galaxies should have dislocated.
01:26Yet, they remained intact.
01:28This paradox indicated that a mysterious force kept them in cohesion.
01:33An undetectable presence, a massive and invisible object hidden in the galactic center,
01:38exerting its influence without ever revealing itself.
01:41Rubin began to repeat these observations on other galaxies.
01:44It was not an isolated anomaly, but an omnipresent phenomenon.
01:48It happened by chance to highlight that these cosmic structures
01:52were bathed in a matter of colossal density,
01:55much higher than that of all the stars, planets and gas clouds combined.
01:59An invisible force enveloped them.
02:02Astronomers called this entity black matter,
02:05because it does not emit any light, does not reflect it,
02:08and does not seem to interact with any other substance.
02:11It is simply there.
02:13And yet, all models confirm not only its existence,
02:17but also its fundamental role.
02:19It alone constitutes 85% of the total mass of the universe.
02:24Without it, the world as we know it would not exist.
02:28Yet, just like the invisible star detected in the center of the Milky Way,
02:32the only way to perceive it was its gravitational footprint.
02:36How to uncover what refuses to be found?
02:40Recently, scientists have hypothesized the existence of an invisible star
02:45in the center of the Milky Way.
02:47A fascinating discovery that could finally give us a glimpse
02:50of the real nature of black matter.
02:52They started by tracking the slightest clues of its existence,
02:56scrutinizing all possible signs of its presence.
02:59They analyzed the movement of galaxies
03:01and caused collisions of particles in giant accelerators,
03:05hoping to generate tiny fragments of black matter in the laboratory.
03:09But these efforts did not yield results.
03:12They even ignored what they were looking for.
03:15Is black matter only made up of particles?
03:18A theory suggested that it would be made up of ghostly particles,
03:22barely able to interact with ordinary matter.
03:25Other hypotheses suggested that it could appear and disappear in a blink of an eye.
03:29A problem still existed.
03:31If black matter worked that way,
03:34then the galactic centers should be incredibly dense,
03:37saturated with compressed matter in a tiny volume.
03:40However, the observation reveals a completely different reality.
03:43The cores of galaxies seem surprisingly diffuse,
03:46extended, almost ethereal.
03:48It is then that a new theory has emerged.
03:51What if the black matter nested at the heart of galaxies
03:54was not made up of heavy particles as we had long assumed?
03:57What if it was of such a thin nature
04:00that it behaved more like an air filament?
04:03These hypothetical filaments would be of incredible lightness,
04:06far beyond all that science has been able to observe so far.
04:09They would even be billions of times smaller than a neutrino,
04:12yet already the lightest known particle.
04:15This concept, called blurry black matter,
04:18could upset everything we thought we knew about the universe.
04:21A team of astrophysicists wanted to test this hypothesis.
04:25They therefore designed a simulation,
04:27modeling a galaxy with two main elements,
04:30a large amount of blurry black matter and a small fraction of gas.
04:34The same type of gas that generates the visible stars.
04:37Once the program was launched,
04:39they simply let the system evolve,
04:42carefully observing the interaction between these two components.
04:45At first, it was a total chaos.
04:48But gradually, the blurry black matter began to condense,
04:52grouping together to form a gigantic invisible object
04:55near the galactic center.
04:57The gas reacted immediately,
04:59dispersing in this impalpable mass,
05:02mixing and generating a faint glow.
05:05Then, an extraordinary phenomenon occurred,
05:08giving birth to dark stars.
05:10Unlike classic stars like our sun,
05:13radiating heat and light,
05:15these objects were colossal, invisible,
05:18and resulted from the fusion of two forms of matter.
05:21A totally new entity, never observed before.
05:24These structures extend over thousands of light years,
05:28while being almost immaterial,
05:30closer to huge cosmic clouds than to real stars.
05:33Their nature, their value,
05:35to be named boson-fermion stars.
05:38Finally, the mystery of black matter seemed to find an explanation.
05:42The nucleus of these invisible stars
05:44presented an ideal density,
05:46neither too high nor too low,
05:49and corresponded exactly to the observations of astronomers
05:52on real galaxies.
05:54If this hypothesis had just been confirmed,
05:57it could explain the behavior and role of black matter in the universe.
06:01Each galaxy in the universe could then be influenced
06:04by one of these gigantic ghost objects.
06:06The star hidden in the heart of the Milky Way could be one,
06:09shaping our galaxy in a way
06:11we had never been aware of.
06:14This matter would behave very differently from ordinary matter.
06:17Unable to form solid structures,
06:19it would exist in the form of a complex network
06:22moving filaments or hair.
06:24This also means that the Earth could be completely plunged into it.
06:27The black matter being subjected to gravity,
06:30it is attracted by planets and stars,
06:33concentrating in dense flows
06:35that lead it to cross our planet,
06:37while constantly oscillating.
06:39If we could observe it,
06:41it would appear in the form of luminous and invisible filaments,
06:44piercing the planet and stretching into space.
06:47But this is just the beginning.
06:49Now, scientists must refine their models,
06:52enrich them with details,
06:54and confront their predictions with real observations of galaxies.
06:57The discovery of a dark star in the heart of the galaxy
07:00is not our only clue.
07:02Fortunately, a cosmic phenomenon
07:04allows us to detect the trace of it.
07:06The gravitational lens.
07:08When the light of a distant galaxy crosses the universe,
07:11it can cross a massive galaxy
07:13or another object with an intense gravitational field.
07:16Rather than continuing its trajectory in a straight line,
07:19it is then curved by this colossal force.
07:22Reaching Earth, this distorted light
07:24offers a enlarged and distorted image of the original galaxy,
07:27as if we were looking through a curved glass.
07:30If the black matter is blurry,
07:32it should leave a singular imprint on these images,
07:35making some areas slightly troubled and wavy.
07:38To have confirmation of this,
07:40an ideal object had to be observed,
07:42and scientists have found one.
07:44A distant galaxy whose light,
07:46deformed by gravity,
07:48presented a strange elongated silhouette.
07:51They then connected radiotelescopes from all over the world,
07:54forming a virtual planetary-scale telescope.
07:57It was able to zoom in
07:59to perceive the smallest details of this galaxy
08:02as clearly as a grain of sand on the Moon.
08:05They then conducted a vast experiment
08:07generating simulations of this image
08:09with different sizes of blurry black matter particles.
08:12At a precise moment,
08:14they ended up discovering a perfect correspondence.
08:17This allowed them to calculate the exact mass of these particles
08:20well before detecting them.
08:22The clues point directly to our own galaxy.
08:25The densest areas of these cosmic hairs,
08:28their roots,
08:30could be surprisingly close
08:32to only a few tens of thousands of kilometers from Earth,
08:35a distance accessible for a space probe.
08:38With the discovery of this invisible star
08:41in the center of the Milky Way,
08:43it remains only to study it closely.
08:45A mission to one of its roots
08:47could finally allow us to solve
08:49one of the greatest mysteries of the Universe.