![\"nasa1\"](\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/nasa1-450x315.jpg\")
<\/a><\/p>\nFort heureusement ces nombreuses rencontres se sont sold\u00e9es \u00e0 chaque fois par la d\u00e9sint\u00e9gration de la m\u00e9t\u00e9orite. Les scientifiques insistent n\u00e9anmoins sur la n\u00e9cessit\u00e9 de cataloguer tous les petits corps dont la taille oscille entre 100 et 1000 m\u00e8tres de diam\u00e8tre qui croisent \u00e0 proximit\u00e9 de notre plan\u00e8te.<\/p>\n
Si la Terre venait \u00e0 rencontrer un de ces petits ast\u00e9ro\u00efdes, l’atmosph\u00e8re serait insuffisante pour nous prot\u00e9ger. On peut fr\u00e9mir en pensant aux d\u00e9g\u00e2ts que produirait une telle collision, quand on sait que la m\u00e9t\u00e9orite de Tcheliabinsk (diam\u00e8tre estim\u00e9 de 15 m\u00e8tres pour une masse de 10.000 tonnes) a d\u00e9gag\u00e9 une \u00e9nergie \u00e9quivalente \u00e0 30 fois celle de la bombe atomique d’Hiroshima en 1945.<\/p>\n","protected":false},"excerpt":{"rendered":"
En f\u00e9vrier 2013, l’explosion d’un bolide au-dessus de la ville russe de Tcheliabinsk (image ci-dessous) \u00e9tait venue nous rappeler que la Terre n’est pas \u00e0 l’abri d’une rencontre avec de grosses m\u00e9t\u00e9orites. La NASA le confirme avec la publication d’une \u00e9tude men\u00e9e entre 1994 et 2013.<\/p>\n","protected":false},"author":8,"featured_media":1214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[125,554,556,557,388,553,486,114,555,175],"class_list":["post-1210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-atmosphere","tag-bolide","tag-bombe-atomique","tag-hiroshima","tag-impact","tag-meteorite","tag-nasa","tag-planete","tag-tcheliabinsk","tag-terre"],"yoast_head":"\n
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<\/a><\/p>\n