{"id":4582,"date":"2008-09-03T16:14:48","date_gmt":"2008-09-03T14:14:48","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil1\/?p=4582"},"modified":"2015-04-13T16:24:13","modified_gmt":"2015-04-13T14:24:13","slug":"le-role-de-la-voie-lactee-dans-les-extinctions-de-masse","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/le-role-de-la-voie-lactee-dans-les-extinctions-de-masse\/","title":{"rendered":"Le r\u00f4le de la Voie Lact\u00e9e dans les extinctions de masse"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p align=\"justify\"><span style=\"font-size: small;\">Et si la plupart des 6 extinctions de masse de l&rsquo;histoire de la Terre co\u00efncidaient avec le passage du Syst\u00e8me Solaire dans une r\u00e9gion bien particuli\u00e8re de la Voie Lact\u00e9e ?<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">C&rsquo;est du moins ce que pense une \u00e9quipe de scientifiques de l&rsquo;Universit\u00e9 de Cardiff qui sugg\u00e8re un lien entre les extinctions de masse qu&rsquo;a connu la Terre tout au long de son histoire et une r\u00e9gion particuli\u00e8re de la Voie lact\u00e9e qui perturberait l&rsquo;orbite des petits corps du Syst\u00e8me Solaire.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Le mod\u00e8le d\u00e9velopp\u00e9 par ces chercheurs &lsquo;montre&rsquo; que le passage du plan de la Voie Lact\u00e9e, qui survient tous les 35 \u00e0 40 millions d&rsquo;ann\u00e9es, contraindrait le Syst\u00e8me Solaire \u00e0 franchir des r\u00e9gions plus denses en gaz et poussi\u00e8re. Ce qui provoquerait des bouleversements gravitationnels \u00e0 l&rsquo;int\u00e9rieur de tous le Syst\u00e8me Solaire augmentant par 10 le risque de collision entre la Terre et un des petits corps (com\u00e8tes, ast\u00e9ro\u00efdes) qui le peuplent.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Pour les scientifiques, le mod\u00e8le est en ligne avec ce que l&rsquo;on sait de l&rsquo;histoire mouvement\u00e9 de la Terre.<\/span><\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p align=\"justify\"><span style=\"font-size: small;\">Les 2 meilleurs exemples sont la chute d&rsquo;un ast\u00e9ro\u00efde dans la p\u00e9ninsule du Yucatan au Mexique qui, il y a 65 millions d&rsquo;ann\u00e9es, aurait \u00e9t\u00e9 \u00e0 l&rsquo;origine des \u00e9v\u00e8nements qui ont provoqu\u00e9 la disparition des dinosaures et le fait que depuis 36 millions d&rsquo;ann\u00e9es, la Terre n&rsquo;a plus connu de collision de tr\u00e8s grande ampleur.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Mais ce n&rsquo;est pas tout, le cycle que suivraient ces extinctions de masse, bien qu&rsquo;il soit tr\u00e8s difficile de les dater, laisse \u00e0 penser que certains de ces \u00e9pisodes se sont produits quand le Syst\u00e8me Solaire se trouvait justement dans ces r\u00e9gions de la Voie Lact\u00e9e.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Enfin, si l&rsquo;on se fie \u00e0 ce mod\u00e8le, notre position actuelle dans la Voie Lact\u00e9e n&rsquo;est gu\u00e8re rassurante (\u00e0 l&rsquo;\u00e9chelle de la Galaxie): On peut th\u00e9oriquement s&rsquo;attendre ces prochains millions d&rsquo;ann\u00e9es \u00e0 un \u00e9v\u00e9nement d\u00e9vastateur.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">source : <a href=\"http:\/\/www.techno-science.net\/\">http:\/\/www.techno-science.net\/<\/a><\/span><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"4582\">(631)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Et si la plupart des 6 extinctions de masse de l&rsquo;histoire de la Terre co\u00efncidaient avec le passage du Syst\u00e8me&#8230;<\/p>\n","protected":false},"author":1,"featured_media":4583,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[22],"tags":[3472,881,3474,882,3473,1145],"class_list":["post-4582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-comose","tag-cycles","tag-extinction-de-masse","tag-meteors","tag-role","tag-voie-lactee","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/meteors.jpg?fit=350%2C326&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-1bU","jetpack-related-posts":[{"id":10997,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-de-centaines-de-galaxies-cachees-par-la-voie-lactee\/","url_meta":{"origin":4582,"position":0},"title":"D\u00e9couverte de centaines de galaxies cach\u00e9es par la Voie Lact\u00e9e","author":"Admin","date":"19 f\u00e9vrier 2016","format":false,"excerpt":"Les astronomes ont utilis\u00e9 des ondes radio pour analyser la masse galactique et la poussi\u00e8re d\u2019\u00e9toile de la Voie lact\u00e9e. Et ils ont d\u00e9couvert qu\u2019il y avait des centaines de galaxies proches qui \u00e9taient cach\u00e9es. Cette d\u00e9couverte montre 883 galaxies qui ont \u00e9t\u00e9 observ\u00e9es par les scientifiques en utilisant le\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/collision_Voie_lactee_Andromede.jpg?fit=600%2C386&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/collision_Voie_lactee_Andromede.jpg?fit=600%2C386&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/collision_Voie_lactee_Andromede.jpg?fit=600%2C386&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":17056,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-voie-lactee-pourrait-propager-la-vie-detoile-en-etoile\/","url_meta":{"origin":4582,"position":1},"title":"La voie lact\u00e9e pourrait propager la vie d&rsquo;\u00e9toile en \u00e9toile","author":"Admin","date":"16 octobre 2018","format":false,"excerpt":"Pendant pr\u00e8s de deux si\u00e8cles, les scientifiques ont \u00e9mis l'hypoth\u00e8se que les m\u00e9t\u00e9orites, les ast\u00e9ro\u00efdes, les plan\u00e9to\u00efdes et d'autres objets astronomiques pouvaient r\u00e9partir la vie dans tout l'univers. Cette th\u00e9orie, connue sous le nom de\u00a0Panspermie, est bas\u00e9e sur l\u2019id\u00e9e que les micro-organismes et les pr\u00e9curseurs chimiques de la vie peuvent\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/10\/galaxie-voie-lactee.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/10\/galaxie-voie-lactee.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/10\/galaxie-voie-lactee.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/10\/galaxie-voie-lactee.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27429,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-ondulation-colossale-deferle-a-travers-la-voie-lactee-selon-les-donnees-de-gaia\/","url_meta":{"origin":4582,"position":2},"title":"Une ondulation colossale d\u00e9ferle \u00e0 travers la Voie lact\u00e9e, selon les donn\u00e9es de Gaia","author":"Admin","date":"8 novembre 2025","format":false,"excerpt":"Les mouvements des \u00e9toiles de la Voie lact\u00e9e ont r\u00e9v\u00e9l\u00e9 une gigantesque ondulation vers l'ext\u00e9rieur, d\u00e9clench\u00e9e par un \u00e9v\u00e9nement massif survenu dans le pass\u00e9 tumultueux de notre galaxie. Dans une nouvelle analyse des donn\u00e9es recueillies par le vaisseau spatial de cartographie spatiale Gaia et d'une base de donn\u00e9es d'\u00e9toiles pulsantes,\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/11\/ondulations-voie-lactee-1.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/11\/ondulations-voie-lactee-1.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/11\/ondulations-voie-lactee-1.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/11\/ondulations-voie-lactee-1.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/11\/ondulations-voie-lactee-1.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":24992,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-centaines-de-millions-de-planetes-en-zone-habitable-graviteraient-autour-de-leurs-etoiles-dans-notre-voie-lactee\/","url_meta":{"origin":4582,"position":3},"title":"Des centaines de millions de plan\u00e8tes en zone habitable graviteraient autour de leurs \u00e9toiles dans notre Voie Lact\u00e9e","author":"Admin","date":"2 juin 2023","format":false,"excerpt":"Dans notre galaxie, la Voie Lact\u00e9e, la majorit\u00e9 des \u00e9toiles sont plus petites et plus froides que notre Soleil. Les \u00e9toiles les plus r\u00e9pandues ont ainsi une masse n'exc\u00e9dant pas la moiti\u00e9 de celle de notre Soleil. Des milliards de plan\u00e8tes gravitent autour de ces naines rouges communes. Pour recevoir\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":10458,"url":"https:\/\/www.laterredufutur.com\/accueil\/kepler-a-decouvert-100-exoplanetes-ces-derniers-mois\/","url_meta":{"origin":4582,"position":4},"title":"Kepler a d\u00e9couvert 100 exoplan\u00e8tes ces derniers mois","author":"Admin","date":"12 janvier 2016","format":false,"excerpt":"Kepler a commenc\u00e9 sa carri\u00e8re en 2009 et il a d\u00e9tect\u00e9 des dizaines d\u2019\u00e9toiles mais aussi des centaines de corps c\u00e9lestes en l\u2019espace de quelques ann\u00e9es. Gr\u00e2ce \u00e0 lui, la NASA a une meilleure connaissance de la Voie Lact\u00e9e et des astres qu\u2019elle dissimule. Mieux, le t\u00e9lescope a m\u00eame identifi\u00e9\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/telescope-kepler.jpg?fit=800%2C600&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/telescope-kepler.jpg?fit=800%2C600&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/telescope-kepler.jpg?fit=800%2C600&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/telescope-kepler.jpg?fit=800%2C600&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":12230,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-la-galaxie-dandromede-percutera-notre-voie-lactee\/","url_meta":{"origin":4582,"position":5},"title":"Quand la galaxie d&rsquo;Androm\u00e8de percutera notre Voie lact\u00e9e","author":"Admin","date":"24 mai 2016","format":false,"excerpt":"Une simulation scientifique de collision cosmique diffus\u00e9e sur Internet a ressuscit\u00e9 le spectre d'une terrible fin du monde. Le vrai du faux. C'est la publication d'une simulation vid\u00e9o diffus\u00e9e par le Centre international australien de la recherche en radioastronomie qui a relanc\u00e9 le sujet. Notre lointaine voisine, la galaxie d'Androm\u00e8de,\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/galaxie-andromede-voielactee.jpg?fit=660%2C281&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/galaxie-andromede-voielactee.jpg?fit=660%2C281&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/galaxie-andromede-voielactee.jpg?fit=660%2C281&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=4582"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4582\/revisions"}],"predecessor-version":[{"id":4584,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4582\/revisions\/4584"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/4583"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=4582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=4582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=4582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}