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  • 7 weeks ago
Regardez cette vidéo où la NASA dévoile un énorme trou dans le Soleil et explique pourquoi cela pourrait impacter la Terre ! Découvrez comment les tempêtes solaires, les effets géomagnétiques et la météo spatiale pourraient affecter notre planète, des réseaux électriques aux communications par satellites. Ne manquez pas cette opportunité de comprendre ce dont les scientifiques nous avertissent et ce que cela signifie pour notre vie quotidienne. Apprenez la science derrière l'activité solaire d'une manière facile à comprendre et fascinante à regarder. Regardez maintenant pour voir pourquoi ce gigantesque trou solaire fait parler tout le monde. Restez informé, émerveillé et prêt pour le prochain mouvement du Soleil ! Animation créée par Sympa.
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Transcript
00:01Imagine an instant, you enter quietly in your car when suddenly your GPS is fixed.
00:06Your phone offers a perfect signal, but it takes a long time to pass a simple call.
00:12Sometimes even, the communication is cut without reason, you obliging to recompose.
00:17You put it on the account of your operator.
00:20Later, during a night, a light clignote an instant.
00:24Don't worry, no phantom will follow you.
00:27Well, let's hope.
00:29In reality, it is more likely that the Sun traverse a phase of agitation.
00:33A huge trou, large of about 800 000 km, is opened in its atmosphere
00:39and envoies now some strange flux directly towards the Earth.
00:43But what really means the expression trou in the Sun?
00:48When we observe it well protected behind special glasses,
00:52we are stable and luminous.
00:55However, it is a total chaos.
00:57It is a total chaos.
00:58The surface goes through the effect of a magnetic wave,
01:00while the plasma torts, romps and reformes without cesse.
01:05Sometimes, the external surface, called the crown, becomes unstable.
01:10Like recently, when a vast portion of the solar atmosphere
01:14has suddenly changed its configuration.
01:17The scientists call it a coronary.
01:19But it is not necessary to imagine any crevasses or cratères.
01:22It is rather an opening in the outer surface of the Sun.
01:25This star is surrounded by forces invisibles,
01:28comparables to the lines of tension on its surface.
01:31In most cases, these lines are closed on its surface.
01:34However, in some places, these lines are extended to the space,
01:38forming real corridors open.
01:41It is then that everything is accelerated.
01:43The particles are propelled at a vertical speed,
01:46creating what we call the solar wind.
01:48This wind traverse the space at around 1,6 million km at an hour,
01:52atteignant the Earth in just a few days.
01:54The solar wind surge in just a few days.
01:57The area of the Sun, where it comes from,
01:59is more cold and cold that the rest of its surface.
02:02D'où its name, the crown coronal.
02:04Or, the actual is gigantic.
02:06We could align with almost 62 Earths, côte-à-côte.
02:09It extends on a huge portion of the south of the Sun,
02:13and is directly oriented towards our planet.
02:16But, what does the Sun send us exactly?
02:19And what happens when it reaches us?
02:21The solar wind is not just fast.
02:24It transports many particles charged electrically
02:27that the Sun expels when it comes to the Earth.
02:30When this solar wind enters in collision with the Earth's magnetic field,
02:33the effect is comparable to a pierre jeté in a calm air.
02:37It deforms the magnetic field of the Earth,
02:40making it inflate like a ballon that we push,
02:42giving so naissance to these splendid aurors.
02:45Parfois, cependant, the Sun va even more far.
02:49Instead of a constant flux,
02:51it suddenly creates a huge wave of solar matter.
02:54We call it an ejection of coronal mass, or EMC.
02:59This phenomenon can perturb the GPS
03:01and break the signals,
03:03especially because of the ionosphere,
03:05a couche charged very high in the atmosphere,
03:08which helps the radio radio to spread.
03:10When this couche is destabilized,
03:12the signals start to rebound in a normal way
03:15or completely disappear.
03:17In May 2025,
03:18the Earth was struck by a geomagnetic meteorologist
03:21classed G3,
03:22so considered as forte.
03:24It came from a powerful flux of solar wind
03:26from a coronal tunnel,
03:27and caused the aurors visible
03:29to the south of Iowa and Oregon.
03:31The authorities had averti
03:33d'éventuelles perturbations
03:34of GPS and radio communications
03:36at a short time,
03:37but no major incident was finally
03:38pointed out.
03:40A few days later,
03:41the situation was aggravated.
03:43The 1er and 2 juin,
03:45a new tempest has exploded,
03:47this time classed G4,
03:49a level considered severe,
03:51just below the most extreme category.
03:54The eyes are illuminate
03:56of spectacular colors.
03:58The inhabitants of all the north of the United States,
04:00and even as far as south as California
04:02and the Nouveau Mexicans,
04:04have observed impressive
04:05extraordinary draperies lumineuses,
04:07vertes and roses
04:08traversées the night.
04:09A special spectacle
04:11is usually visible
04:12that in the Arctic or Antarctic circles.
04:15Very well.
04:16It seems now clear
04:17that the ghosts are not for nothing.
04:19But it was not just a simple spectacle
04:21lumineux,
04:22even that the astronauts
04:23of the International Space Station
04:25had immortalized
04:26images saisissantes.
04:27The companies aérienne
04:29have been averties
04:30of this unusual rayon
04:32and have been able to modify
04:33some itinéraires
04:34by precaution.
04:35The satellites
04:36surveyed
04:37the potential derivatives
04:38of the signals,
04:39while the communications
04:40in high frequency
04:41used by navires,
04:42avions
04:43and radios amateurs
04:44have been able to
04:45know
04:46of breves perturbations.
04:47Then another phenomenon
04:48is coming.
04:49A few weeks later,
04:50at the mi-juin,
04:51the Earth was struck by
04:53a geomagnetic wave
04:54of class G2.
04:55Less intense
04:56than the previous event,
04:57it represented
04:58a reduced risk
04:59of perturbations
05:00and offered
05:01a new opportunity
05:02to immortalize
05:03the light of the sky.
05:04Then,
05:05to complicate
05:06the light of the sky
05:07with two powerful eruptions
05:08the 17 and 19 juin.
05:10These eruptions
05:11are distinct
05:12of a surge
05:13of energy
05:14but produce
05:15similar effects.
05:16The light of the sky
05:17in a perpetual movement
05:18trains the waves
05:19of the sky
05:20magnetic waves
05:21and the entremelings.
05:22Finally,
05:23these waves
05:24magnetic waves
05:25end up to the point
05:26that they end up
05:27by romping,
05:28causing an eruption
05:29solar wave.
05:30If an ejection
05:31of the coronary
05:32of the sky
05:33of the sky
05:34a eruption
05:35solar wave
05:36appears rather
05:37to the sudden
05:38of an interruptor.
05:39But here,
05:40the light is made
05:41of radiation
05:42traversing
05:43space
05:44at the speed
05:45of the light
05:46of the light.
05:47These eruptions
05:48quickly,
05:49sometimes in a few minutes
05:50and can cause
05:51problems
05:52without even
05:53transports of particles.
05:54So,
05:55while the ejections
05:56of coronary waves
05:57look at
05:58massive waves
05:59of energy
06:00to reach the Earth,
06:01the solar eruptions
06:02are the lights
06:03that hit before
06:04we see them come.
06:05At the mi-juin,
06:06two of them
06:07have touched our planet
06:08successively.
06:09The second,
06:10more intense,
06:11a briefly interrupted
06:12the radio communications
06:13in several regions
06:14of the United States.
06:15Why all this
06:16is happening now?
06:17This phenomenon
06:18has nothing
06:19of an arbitrary way.
06:20The sun follows
06:21a well defined cycle
06:22and traverse
06:23different phases,
06:24comparable
06:25to different
06:26phases.
06:27Around every 11 years,
06:28it becomes more agitated.
06:29There are more
06:30than eruptions,
06:31taches
06:32and anomalies.
06:33The scientists
06:34call this period
06:35of strong activity
06:36the maximum solar.
06:37And we are now
06:38today.
06:39At this moment,
06:40we are engaged
06:41in the solar cycle
06:4225,
06:43which the point culminant
06:44is expected
06:45between now and
06:46the beginning of 2026.
06:47During this phase,
06:48the activity
06:49of the sun
06:50intensifies progressively.
06:51This indicates
06:52that it is only the beginning.
06:53And the next months
06:54will bring
06:55even more significant
06:56times.
06:57So,
06:58the sun
06:59will not be
07:00as much as
07:01as
07:02as
07:03as
07:04as
07:05as
07:06as
07:07as
07:08as
07:09as
07:10as
07:11as
07:12as
07:13as
07:14as
07:15as
07:16as
07:17as
07:18as
07:19as
07:21as
07:22as
07:23as
07:24as
07:25as
07:26there are
07:27a lot of
07:28water
07:29and
07:30electric currents can form in the ground, and these flux,
07:33far away from them, can fray a path to the lines of high tension.
07:38If these currents become enough strong, they can charge the transformers,
07:43damage the entire infrastructure, and cause massive coupures.
07:48This is what happened in Quebec in 1989,
07:51when a solar storm had plunged the entire province in the dark in just 90 seconds.
07:57It's for this reason that agencies like NASA and the NOAA
08:01surveyed in permanence the solar activity.
08:03They can determine when a phenomenon goes towards us,
08:06estimate its intensity, and decide the alerts to emit.
08:10The most time, we don't think of the sun,
08:13except when a snowstorm gets into the clouds
08:16or when a snowstorm confines inside us, rêvant of summer.
08:20However, it reminds us sometimes that it remains a force indomptive,
08:24a fascinant of chaos in perpetual activity.
08:27It s'embrase, enters in eruption,
08:29and projects immense waves of particles charged in the space.
08:32And even at 150 millions of kilometers,
08:35we feel the effects.
08:36A signal suddenly lost,
08:38a light bulb, a light bulb,
08:40a brief variation of current,
08:42so many indicators that we are not as detached from the space that we believe.
08:46So, when your GPS feels strange,
08:49or the screen clicks without reason,
08:51inutile to accuse your phone.
08:53This could be the sun,
08:55again a change.
08:56And on the right note,
08:59stop touching ground.
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