Une Découverte Bizarre Révèle Que La Lune Rouille

Sympa

En voici une étonnante : les scientifiques ont découvert que la Lune est en train de rouiller ! La rouille se produit généralement lorsque le métal réagit avec l’eau et l’oxygène, mais la Lune ne possède pas beaucoup de l’un ni de l’autre. Alors, comment cela se produit-il ? Il se trouve que de petites quantités d’oxygène provenant de l’atmosphère terrestre parviennent à la Lune, grâce au vent solaire. Combinez cela avec un peu d’eau provenant de la glace emprisonnée dans les roches lunaires, et voilà—la rouille commence à se former ! C’est vraiment étrange car la Lune est censée être trop sèche et dépourvue d’air pour que cela se produise. Cette découverte bizarre montre simplement à quel point la Terre et la Lune sont connectées de manière inattendue !  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

00:00The moon is rusting, and there is a strong chance that it is because of the Earth.

00:05You may think that with a distance of more than 380,000 km,

00:09it is unlikely that these two objects will influence each other so directly.

00:13But they do have a particular link.

00:17The moon also affects our planet, and you can see it by observing the oceanic tides.

00:23When the Earth rotates, the gravitational force of the moon attracts the water on the side it is closest to.

00:29This creates a ripple.

00:31At the same time, another ripple forms on the opposite side,

00:35because our planet is rotating, which causes a centrifugal force.

00:40The planet continues to rotate under these ripples,

00:43which explains why we have two low tides and two high tides every day.

00:49In addition, the moon oscillates from time to time, tilts a little,

00:53and causes changes in the oceanic tides.

00:57In return, the Earth's atmosphere rusts our satellite.

01:00Rust is this reddish substance that we see on old portals or nails.

01:05And do you know the Vermilion Cliffs and the Grand Canyon?

01:08If they also have this red color, it is thanks to the presence of rusted iron in the rocks.

01:13Rust forms when iron reacts with oxygen and water.

01:18Rust is common even on Mars.

01:20The characteristic color of this planet comes from the rust that has been there for a very long time.

01:25This is how the red planet got its nickname.

01:29It is difficult to imagine that the moon can be a place that rusts easily,

01:33because it is dry and does not really have an atmosphere.

01:36But a space vehicle studied the moon in 2008

01:39and detected spectra, wavelengths of light,

01:42which were reflected on the different surfaces of the moon.

01:45Thanks to them, it was possible to better analyze the lunar surface.

01:49The data it reported showed that the lunar poles

01:52had a different composition from that of the rest of the moon.

01:55The rocks that are there contain a lot of hematite.

01:58This is a particular type of iron oxide, or simply rust.

02:03No one expected this, because there should not be as much rust on the moon,

02:07given the conditions that reign there.

02:10But we know that there is water on the surface of our satellite.

02:13This is why new theories have emerged on the different minerals that the moon could hide.

02:18It is possible that it was formed as a result of a reaction of water with rocks.

02:24For iron to take this rust, it needs what is called an oxidant.

02:28It is a molecule that removes electrons from materials such as iron, such as oxygen.

02:34But the solar wind constantly hits the moon and brings hydrogen with it.

02:39However, hydrogen has the opposite effect.

02:41It gives electrons to other molecules.

02:44The Earth has a shield against the solar wind.

02:47Our magnetic field.

02:49But the moon does not have such a protection.

02:52And, for this reason, rust should not be able to form on its surface.

02:56But this process happens anyway.

02:58And it may be the fault of the Earth.

03:01The moon itself does not have an atmosphere

03:03likely to provide enough oxygen for the iron to rust.

03:06But apparently, our planet is quite generous

03:09and is part of its own atmosphere.

03:12The oxygen of our atmosphere travels to the moon

03:15following the magnetosphere's tail.

03:17It is a long extension of the Earth's magnetic field

03:20that can reach the hidden side of the moon.

03:23This is precisely where most of the hematite we mentioned is located.

03:28On a full moon, the magnetosphere's tail blocks 99% of the solar wind

03:33which should normally influence our satellite more.

03:36It is as if a temporary curtain was covering its surface,

03:39which leaves time for rust to form.

03:42But there is still an important element

03:44that is necessary for the appearance of rust.

03:46Water.

03:48You will not easily find water

03:50if you decide to go for a walk on the moon one day.

03:53Most of the water is frozen

03:55and hidden in areas that are always in the shade and cold.

03:58These areas are very far from where the hematite was discovered.

04:02And it is therefore difficult to know how the water got there.

04:08But there is an interesting idea.

04:10The dust particles that hit the moon

04:12could release water molecules

04:14trapped in the surface layer of the satellite.

04:17This is how the water is mixed with iron.

04:20We do not know exactly what these dust particles are made of,

04:24but it is possible that they also carry water.

04:27By touching the lunar surface, they could create heat,

04:30which would stimulate the oxidation process

04:33and lead to rust formation.

04:35Thus, our planet does certain things that modify the moon,

04:38but humans also have their influence.

04:40A probe that landed on the lunar surface in 1959

04:44was the first object man-made to touch the moon.

04:47It was also at this time

04:49that we began to modify the moon in an unpredictable way.

04:52Scientists call this the lunar anthropocene.

04:56It is an analogy with the terrestrial anthropocene,

04:59a period during which human activity

05:01had a significant impact on the planet.

05:04It is not possible to determine a precise starting point

05:07for the beginning of this period,

05:09but we know today that the actions we have taken

05:11during our existence

05:13have really changed the environment of our planet.

05:16No one still lives on the moon,

05:18but we have already left traces of it.

05:21After the arrival of man on the moon,

05:23we carried out many missions.

05:25We left landers and flags,

05:27moved the lunar soil,

05:29brought golf balls,

05:31scientific equipment and even human waste.

05:34What are the projects for the future?

05:36Send other missions to the moon

05:38and even possibly create an infrastructure

05:41where some of us could live,

05:43study the resources of the moon

05:45and send them back to Earth.

05:47This is why it is important to talk about the lunar anthropocene

05:50to remind us that we must be responsible

05:52and take care of our heritage.

05:55Many people do not understand

05:57why we sometimes see the moon during the day.

06:00Some even believe that this is a new phenomenon

06:03that did not exist before.

06:05Especially since we started sharing low-resolution images

06:08of what looks like a full moon

06:10in the middle of the day.

06:12Others think that the sun is no longer the same color as before.

06:16It would have been more yellow.

06:19The sun has not changed color.

06:21It is still blue-green.

06:24But it is possible that we saw it more yellow

06:26when we were younger

06:28because then pollution was not so important.

06:31As for the moon,

06:33we can see it as well at night as during the day.

06:35It is brighter at night

06:37because there is no light coming from the sun.

06:39But it is not as if it disappeared during the day.

06:42It is still there.

06:44But we do not see it during the phase of the new moon.

06:47This phase lasts a few days

06:49and, during this period,

06:51the moon approaches the sun.

06:53The light diffused by the sun

06:55makes our satellite less visible.

06:58As for the phases of the moon,

07:01they are easy to recognize if you pay attention.

07:04First of all, there is the black moon,

07:07which can have several meanings.

07:09According to one of the definitions,

07:11it occurs when there are two new moons in a month.

07:14Another says that the black moon occurs

07:16when there are no new moons in the month

07:18and it only happens in February.

07:21The blue moon is not thus designated because of its color.

07:24This is the third full moon of a season

07:26of which there are four.

07:28A super moon occurs when a full moon

07:30coincides with the moment when the moon

07:32is closest to the Earth on its elliptical orbit.

07:35That's why it looks bigger than usual.

07:38Sometimes, you can look up at the night sky

07:41and see a disturbing red sphere.

07:44It is not a sign announcing the end of the world

07:46or the presence of the werewolf.

07:48But it is true,

07:50the blood moon is a good source of inspiration

07:52for this kind of story.

07:54In reality, it is simply an astronomical event

07:56during which our planet projects

07:58a reddish shadow on the moon.

08:00This happens when the Earth interposes

08:02between the moon and the sun,

08:04what is called a total lunar eclipse.

08:06The little companion of the Earth

08:08captures a part of the red light

08:10coming from our atmosphere.

08:12That's why you see this specific color.

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