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    Meteorite poob rau ntiaj teb

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    Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 11:09





    De mémoire d'homme, c'est la première fois que la chute d'une météorite sur Terre fait autant de victimes. Les derniers rapports font état d'au moins 1.100 blessés et une centaine d'hospitalisations autour de la ville de Tcheliabinsk en Russie après le passage et la désintégration d'un bolide dans l'atmosphère. Jusqu'ici, le nombre de personnes blessées par des météorites se comptait sur les doigts d'une seule main, avec une femme touchée au côté par un caillou de la taille d'un pamplemousse alors qu'elle faisait une sieste dans sa maison en Alabama en 1954, et un jeune garçon touché à la tête en Ouganda en 1992, par un fragment heureusement ralenti par un arbre.

    L'Académie des sciences russe estime que le bolide qui a provoqué des scènes de panique à Tcheliabinsk faisait une dizaine de tonnes, et s'est désintégré à plus de 30 km d'altitude après être entrée dans l'atmosphère à une vitesse de 54.000 km/h.

    Désolé, cette vidéo n'est pas disponible sur votre mobile
    brightcove.createExperiences(); La plupart des blessés dans la région de Tcheliabinsk ont été atteints par des vitres brisées sous l'effet du bang supersonique produit par le passage de la météorite à très grande vitesse dans les couches de l'atmosphère, même si plusieurs fragments ont aussi pu retomber au sol. Sur une des vidéos, prise par un habitant depuis sa fenêtre, on voit la traînée dans le ciel de la météorite qui s'est déjà fragmentée, avant d'entendre une violente explosion suivie de bris de verre. «Le fait que l'explosion survienne quelque temps après le passage de la météorite montre qu'il s'agit bien de l'onde de choc provoquée par son passage dans l'air à des vitesses supersoniques», précise Jérémie Vaubaillon, astronome spécialiste des étoiles filantes à l'Institut mécanique céleste et de calcul des éphémérides (IMCCE) à Paris.

    Une explosion d'Hiroshima tous les ans dans l'atmosphère

    À partir de plusieurs vidéos filmées lors de l'événement en Russie, l'astronome français a déterminé que l'objet venait du nord-est et se déplaçait vers le sud-ouest. Une trajectoire qui permet d'exclure avec certitude tout lien avec l'astéroïde 2012 DA14 qui va frôler la Terre à 27.700 km de distance ce soir.

    «Même si les chutes de météorites ne font généralement que très peu de dégâts visibles, ces événements ne sont en revanche pas si rares que cela», précise Patrick Michel, spécialiste des astéroïdes à l'Observatoire de la Côte d'Azur à Nice. «Chaque année, entre 10.000 et 100.000 tonnes d'objets venus du Système solaire entrent en contact avec la Terre.» Si la plupart de ces météorites ne sont que des simples poussières, qui disparaissent en ne laissant que la trace d'une étoile filante dans le ciel, certaines sont plus grosses et viennent percuter la Terre. «Une étude réalisée à partir de données déclassifiées de satellites espions américains montre que chaque année, une météorite explose dans l'atmosphère en dégageant une énergie comparable à celle de la bombe atomique d'Hiroshima», explique Patrick Michel. «Mais comme la Terre est recouverte à plus des deux tiers par des océans et que la plupart des régions du globe sont peu habitées, ces explosions passent le plus souvent inaperçues.»

    Trou laissé par un fragment de météorite dans la glace près de Tcheliabinsk.
    Trou laissé par un fragment de météorite dans la glace près de Tcheliabinsk. Crédits photo : Uncredited/AP

    En 1908, une météorite d'une cinquantaine de mètres de large avait tout de même explosé dans la région de la Tunguska en Sibérie, rasant 2000 kilomètres carrés de forêt. Un événement de ce genre, qui ne survient qu'une fois tous les 100.000 ans, pourrait entièrement détruire une des grandes villes de la planète. Il y a 65 millions d'années, la chute d'un astéroïde de 10 km de diamètre au Mexique a probablement provoqué l'extinction des dinosaures ainsi que de nombreuses autres espèces animales et végétales.

    Pour déterminer avec précision la trajectoire de toutes les météorites qui tombent chaque année en France et déterminer d'où elles proviennent, Jérémie Vaubaillon travaille sur un projet de réseau d'une centaine de caméras qui filmeraient en permanence le ciel. Ce projet d'équipement serait couplé avec une association d'amateurs qui aideraient à retrouver les fragments retombés au sol.

    LIRE AUSSI:

    » Météorite russe: les dégâts du bang supersonique

    » L'astéroïde 2012 DA14 va frôler la Terre ce vendredi

    » Russie: de nombreux blessés après la chute de la météorite

    » BLOG - Pluie de météorites sur l'Ouest de la France (en 1803)




    Last edited by nkaujhnubqub on Mon 25 Feb - 4:08; edited 2 times in total



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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 11:21

    La météorite, un «bolide» qui s'est désintégré au-dessus de l'Oural, devait peser «des dizaines de tonnes»

    The meteorite, a "fireball" that disintegrated over the Urals, had to weigh "tens of tons"
    lub meteorite uas lub pob hluav taws lawv ntsuas xyuas nws nyhav ze li ntawm 10 tones.





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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 11:29


    A meteor shower caused by the destruction of a "bolide" above the Ural region of Russia, accompanied by violent explosions and flashes glowing, blew out windows in several localities, panicked. Almost 1000 ...


    Last edited by nkaujhnubqub on Sat 16 Feb - 12:05; edited 1 time in total



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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:00

    http://www.rtbf.be/info/societe/detail_une-pluie-de-meteorites-seme-la-panique-dans-l-oural?id=7928128
    mus hauv no mus nyeem ntawv thiab saib movie



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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:03

    Nkaujhnubqub, koj puas kam pab muab txhais qhov tseem ceeb li me me pub rau kuv tau paub os,
    thiab qhia hnub uas poob ntawd seb nws yog hnub twg os?
    Nws puas muaj duab, muab duab tso rau peb saib thiab os.




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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:07

    kuv tseem mus nrhiav os, kuv mam li sim txhais os tos nawb



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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:10

    nkaujhnubqub wrote:http://www.rtbf.be/info/societe/detail_une-pluie-de-meteorites-seme-la-panique-dans-l-oural?id=7928128
    mus hauv no mus nyeem ntawv thiab saib movie
    Kuv nyeem tsis tau lawv cov ntawv li ces kuv twb tsis paub ib los hlo li os.
    Tsis pom movie li os?




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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:13

    nkaujhnubqub wrote:kuv tseem mus nrhiav os, kuv mam li sim txhais os tos nawb
    Ua li ntawd nawb, kuv nyob tos nyeem koj cov lus txhais os. Txhais tej qhov uas tseem ceeb xwb los tau os.




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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:15

    kuv muab google txhais rau koj nyeem xwb os rau qhov hais tias kuv paub lus hmoob los tsis meej lus mekas los tsis meej li thiab

    From memory, this is the first time that a meteorite on Earth makes many victims. The latest reports indicate that at least 1,100 injured and hundreds of hospitalizations around the city of Chelyabinsk in Russia after the passage and the disintegration of a fireball in the atmosphere. So far, the number of people injured by meteorites counted on the fingers of one hand, a woman touched the side with a stone the size of a grapefruit when she was napping in her house Alabama in 1954, and a young boy shot in the head in Uganda in 1992, by a fragment fortunately slowed by a tree.

    The Russian Academy of Sciences estimated that the meteor that caused scenes of panic in Chelyabinsk was ten tons, and disintegrated over 30 km altitude after entering the atmosphere at a speed of 54,000 km / h.

    broken under the effect of sonic boom produced by the passage of the meteorite at high speed into the layers of the atmosphere, even if several fragments were also able to fall to the ground. On a video taken by a resident from his window, one sees the trail in the sky of the meteorite that is already fragmented before hearing a loud explosion followed by breaking glass. "The fact that the explosion occurs some time after the passage of the meteorite shows that it is the shock wave caused by its passage through the air at supersonic speeds," says Jeremiah Vaubaillon astronomer specialist shooting stars at the Institute celestial mechanics and calculation of ephemerides (IMCCE) in Paris.

    An explosion of Hiroshima every year into the atmosphere

    From several videos filmed at the event in Russia, the French astronomer has determined that the object came from the northeast and moved to the southwest. A path that allows you to exclude with certainty any link with the asteroid 2012 DA14 will come close to Earth 27,700 km away tonight.

    "Although meteorite falls generally do very little visible damage, these events are not so rare, however, that," said Patrick Michel, specialist asteroids Observatoire de la Côte d'Azur in Nice. "Every year, between 10,000 and 100,000 tons of solar system objects from coming into contact with the Earth." While most of these meteorites are just simple dust disappear leaving only traces of a shooting star in the sky, some are larger and come hit the Earth. "A study using data from declassified U.S. spy satellites shows that each year, a meteor exploded in the atmosphere by releasing an energy comparable to that of the Hiroshima atomic bomb," says Patrick Michel. "But as the Earth's surface is covered by more than two thirds of the oceans and most parts of the world are sparsely populated, these explosions spend the most often overlooked."

    qhov hauv qab no yog ib co lus lavphib xaub ua tham txog xwb os
    A meteor shower caused by the destruction of a "bolide" above the Ural region of Russia, accompanied by violent explosions and flashes glowing, blew out windows in several localities, panicked. Nearly 1,000 people were injured, some seriously, mainly through broken windows.

    Friday morning, a loud noise, shock, vibration, several windows blown out.

    An incandescent ball with a very bright white light, moving at high speed, appeared at 9:20 local time (4:20 pm CET) in the sky Chelyabinsk (1500 kilometers east of Moscow), officials said .

    "A meteorite disintegrated over the Urals, burning in the lower part of the atmosphere. Fragments of the meteorite hit the Earth and fell in sparsely populated areas of the Chelyabinsk region" said the local branch of the Russian Ministry of Emergency Situations said in a statement.

    According to the local branch of the Russian Ministry of Emergency Situations, the meteorite, estimated by Russian experts from ten to several tens of tons, burned partially entering the lower layers of the atmosphere before disintegrating.

    Videos placed on the Internet showed pictures of Apocalypse: Chelyabinsk street suddenly illuminated by a blinding white light, balls of fire across the sky in a smoke trail, windows and doors blown out by the shock wave violent explosions.

    "I first thought it was a plane that crashed, but there was no engine noise. Secondly, there was a violent explosion. Many buildings in our street, windows were blown out, "he told Laskov Denis, a resident of Chelyabinsk on public television.
    An exceptional event

    The object that fell in the Urals was originally weigh ten tons and measuring about ten meters. According to experts, the meaning of his entry into the atmosphere precludes there any link with the asteroid that is going to come close to Earth on Friday.

    The explosion, which would have produced 10,000 m, has in any case been very strong since wall collapsed in a factory.

    The university, schools in the region were closed. The Ministry of Emergency Situations said to have mobilized 20,000 men.

    Russian President Vladimir Putin was asked to do their utmost to help the population, while local authorities called the people not to panic.
    Nearly a thousand injured

    "The number of casualties is about 950," said the governor of the Chelyabinsk region Mikhail Iourevitch, quoted by Ria Novosti. According to the administration of this city of one million inhabitants, the results for this industrial city is only 725 casualties, including 159 children.

    According to the governor, two-thirds of the injuries are minor, due to broken glass, and only two people are in serious condition.

    This is the first time it seems that the fall of a meteorite causes many injuries. Typically, the celestial objects that reach the Earth fall in uninhabited areas, such as deserts or oceans. It is estimated that between 10 000 and 100 000 tonnes total weight of dust and meteorites that reach the earth's surface each year.

    Tunguska catastrophe in 1908

    While such an explosion caused by a meteorite, is this possible? Y he precedents?

    "The biggest event of this kind, this is what happened in 1908 in Siberia, Tunguska region. Here, there was an absolutely colossal explosion that occurred in heaven, so in the atmosphere to such an extent that blew millions and millions of trees within 20 km of distance, "said Francesco Lo Bue at the University of Mons," the explosion was heard at this those days, 1500 km, so it is absolutely amazing., but they are rare things that happen. For 1908, we found nothing really ground as fragments, etc.. In the case of the Urals, it is still too early to know what happened. Some say it may be an object of type meteorite that exploded once again into the atmosphere remains on the ground. now c ' is a little too early. "

    Note also that in cities 200 miles away, the same phenomenon was



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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:20

    nkaujhnubqub wrote:
    A meteor shower caused by the destruction of a "bolide" above the Ural region of Russia, accompanied by violent explosions and flashes glowing, blew out windows in several localities, panicked. Almost 1000 ...
    Nws nyuam qhuav tso tawm rau lub 2/14/2013 tau 2 hnub los no xwb tus number neeg saib mas coob heev li lawm os.




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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:24

    http://www.lemurdelapresse.com/toute-la-presse-en-ligne_pageid1.html&theme_id=6
    hauv no yog kuv mus saib xwb os

    Le petit corps céleste qui s'est désintégré dans l'atmosphère au-dessus de Tcheliabinsk, en Russie, a été vu par le satellite Météosat 9, situé à 36000 km d'altitude. L'objet lancé à 30 km/s était alors juste sur le limbe terrestre, à la limite de la visibilité pour le satellite.

    Le panache laissé par l'astéroïde à haute altitude est d'autant plus visible que l'image de Météosat 9 a été prise dans l'infrarouge, qui permet de bien mettre en évidence les différences de température.

    Grâce à cette image datée de 3 h 15 TU (soit 4 h 15 en France, et 9 h 15 à Tcheliabinsk), sur laquelle une projection a été appliquée pour qu'elle semble prise de dessus, on voit aisément la trajectoire d'arrivée du bolide. Celle-ci va bien du nord-est vers le sud-ouest, comme l'avaient indiqué les premiers témoignages.

    Une animation est visible sur le site d'Eumetsat et montre la dispersion du panache. Météosat 10 a aussi observé le bolide, ce qui a permis de produire une animation de la rentrée atmosphérique du bolide.

    Philippe Henarejos, le 15 février 2013.

    translate by google
    The small celestial body that disintegrated in the atmosphere over Chelyabinsk, Russia was seen by Meteosat 9, located at an altitude of 36000 km. The object launched at 30 km / s was then just on the Earth's limb, at the limit of visibility to the satellite.

    The plume left by the asteroid at high altitude is more visible than the image of Meteosat 9 was taken in the infrared, which can clearly highlight the differences in temperature.

    Through this image dated 3 h 15 TU (ie 4 h 15 in France and 15 in Chelyabinsk 9 am), on which a projection was applied to it seems taken from above, one can easily see the arrival path the fireball. It goes north-east to south-west, as was first pointed testimonies.

    An animation is visible on the site and Eumetsat shows the dispersion of the plume. Meteosat 10 also observed the fireball, which has produced an animation of the reentry of the fireball.

    Philippe Henarejos, February 15, 2013.

    yog nag hmo os lub meteor ntawv na



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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:36

    This phenomenon, caused by the destruction of a meteorite over the Urals, blew out windows in several localities. Authorities identify 950 injured.

    The fall of a large meteorite caused panic in the Russian region of Urals Friday at 9:20 local time (4:20 in France). Its passage sparked violent explosions and injured about 950 people around the city of Chelyabinsk, more than a hundred had to be hospitalized. Residents of the industrial city of one million inhabitants located 1500 km east of Moscow reported seeing a bright light in the sky before you feel and hear a few moments later the wave shock blew the walls and windows of buildings 3000. The city authorities reported that about 100,000 square meters of glass were broken.

    The governor of this region has already been estimated the cost of damage to one billion rubles (25 million euros). Debris caused by the fragmentation of large meteorite left a long white trail in the sky visible to Ekaterinburg, 200 km from Chelyabinsk and Kazakhstan 120 km south.

    nia mov mus saib ntxiv os
    http://www.youtube.com/results?search_query=meteorite+oural&oq=met&gs_l=youtube-reduced.1.2.0i3l3j0.12059.12804.0.18282.3.3.0.0.0.0.963.1188.1j1j6-1.3.0...0.0...1ac.1.ws08bNezFSI



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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:45


    hais tias lub meteor nov yog los raws txoj kab li no nws ya los chwv txhuam me me ntiaj teb no os, nws lob li 50 mev dab, nws txhuam sab nyob rau russi,hnub tim 15 lub 2 hli xyoo 2013 no

    ho ua ntej ntawv twb muaj ib co poob cuag nag los rau lawv lub teb chaw thiab no os.
    thiaj li muaj on peb daim duab thiab movie tso tawm nyob rau hauv youtube.



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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:47

    Saib cov videos nov mas txaus ntshai kawg nkaus li os.




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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:49

    yog mas daim ua koj xub pom ces twb yog poob ua ntej lawm tab sis yog cov me xwb ho lub nag hmo los mas yog lub loj dua no na.
    tiamneejtshiab wrote:Saib cov videos nov mas txaus ntshai kawg nkaus li os.



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    Re: Meteorite poob rau ntiaj teb

    Post by tiamneejtshiab on Sat 16 Feb - 12:51

    nkaujhnubqub wrote:
    hais tias lub meteor nov yog los raws txoj kab li no nws ya los chwv txhuam me me ntiaj teb no os, nws lob li 50 mev dab, nws txhuam sab nyob rau russi,hnub tim 15 lub 2 hli xyoo 2013 no

    ho ua ntej ntawv twb muaj ib co poob cuag nag los rau lawv lub teb chaw thiab no os.
    thiaj li muaj on peb daim duab thiab movie tso tawm nyob rau hauv youtube.
    Ua tsaug ntau uas koj muab coj tuaj piav qhia rau peb tau saib tau paub thiab tau pom os.




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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:52

    yog mas daim ua koj xub pom ces twb yog poob ua ntej lawm tab sis yog cov me xwb ho lub nag hmo los mas yog lub loj dua no na.
    Nws twb ya los deb li 28000 km nws loj li 50 diamètre
    tiamneejtshiab wrote:Saib cov videos nov mas txaus ntshai kawg nkaus li os.
    kuv twb tsis paub piav li os kuv txhais tsuag tsuag hauv google los xwb ne hahaha, kuv ntshai thiab hov yog ib hnub lub ntiaj teb kawg mus li no na



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    Re: Meteorite poob rau ntiaj teb

    Post by nkaujhnubqub on Sat 16 Feb - 12:58

    daim no koj thiaj paub lawv tham na



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