{"id":15215,"date":"2017-05-13T20:00:44","date_gmt":"2017-05-13T18:00:44","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=15215"},"modified":"2017-05-13T09:13:12","modified_gmt":"2017-05-13T07:13:12","slug":"une-supernova-a-frappe-notre-planete-il-y-a-environ-26-millions-dannees","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/une-supernova-a-frappe-notre-planete-il-y-a-environ-26-millions-dannees\/","title":{"rendered":"Une supernova a frapp\u00e9 notre plan\u00e8te il y a environ 2,6 millions d&rsquo;ann\u00e9es"},"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>Astrophysique: une supernova a violemment frapp\u00e9 la Terre d&rsquo;une distance d&rsquo;environ 150 ann\u00e9es-lumi\u00e8re. Elle&nbsp;aurait frapp\u00e9 notre plan\u00e8te il y a environ 2,6 millions d&rsquo;ann\u00e9es&nbsp;d&rsquo;apr\u00e8s une nouvelle estimation d&rsquo;une \u00e9tude.<\/p>\n<p>L&rsquo;ann\u00e9e derni\u00e8re, une \u00e9quipe de chercheurs&nbsp;a publi\u00e9 dans Nature la premi\u00e8re s\u00e9rie de tests d&rsquo;une supernova qui aurait frapp\u00e9 violemment la Terre environ il y a 2.600.000 ans.<\/p>\n<p>Aujourd&rsquo;hui&nbsp;&#8211; d&rsquo;apr\u00e8s&nbsp;l&rsquo;Agence spatiale italienne &#8211; une nouvelle \u00e9tude vient confirmer de mani\u00e8re ind\u00e9pendante cette hypoth\u00e8se.<\/p>\n<p>La recherche coordonn\u00e9e par Adrian Melott de \u00abl&rsquo;Universit\u00e9 du Kansas et la publication du Astrophysical Journal, a \u00e9t\u00e9 r\u00e9alis\u00e9e en analysant les hypoth\u00e9tiques effets de l&rsquo;impact de la&nbsp;supernova sur la biologie terrestre.<\/p>\n<p>\u00ab Nous avons maintenant plus de preuves du passage ancr\u00e9 de cette&nbsp;supernova &#8211; dit Melott &#8211; mais la diff\u00e9rence pour nous est la distance de la Terre: Notre estimation est de 150 ann\u00e9es lumi\u00e8re . \u00bb<\/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>Cette \u00ab approche \u00bb de la mort d&rsquo;une \u00e9toile ne serait pas, cependant, d\u00e9termin\u00e9e par des extinctions de masse sur notre plan\u00e8te: \u00ab La&nbsp;\u00ab zone mortelle \u00bb &#8211; dit Melott &#8211; est d&rsquo; environ 25 ann\u00e9es lumi\u00e8re de la Terre. Cependant nous pensons que la supernova en question a eu un certain effet&nbsp;sur notre plan\u00e8te\u00a0\u00bb.<\/p>\n<p>Selon les chercheurs, les rayons cosmiques de la supernova devraient descendre dans l&rsquo;atmosph\u00e8re basse&nbsp;de la Terre, avec un effet significatif sur la troposph\u00e8re.<\/p>\n<p>\u00ab Ces radiations ne sont pas d\u00e9vastateurs &#8211; conclut Melott &#8211; mais ils ont eu&nbsp;un effet: c&rsquo;est comme si tous les organismes sur la Terre avait subi l&rsquo;\u00e9quivalent de plusieurs rayons X par an. Les analyses aux rayons X ne sont pas sans risques, et les m\u00e9decins ne prescrivent pas plus habituellement qu&rsquo;il ne soit vraiment n\u00e9cessaire \u00bb.<\/p>\n<p>Traduction et adaptation de<a href=\"http:\/\/www.laterredufutur.com\/accueil\/\"> la Terre du Futur<\/a><\/p>\n<p>source : &nbsp;<a href=\"http:\/\/www.meteoweb.eu\/2017\/05\/astrofisica-supernova-colpito-violentemente-la-terra-distanza-circa-150-anni-luce\/901507\/#kP17eJmQJiTXUKAI.99\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.meteoweb.eu\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"15215\">(477)<\/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>Astrophysique: une supernova a violemment frapp\u00e9 la Terre d&rsquo;une distance d&rsquo;environ 150 ann\u00e9es-lumi\u00e8re. Elle&nbsp;aurait frapp\u00e9 notre plan\u00e8te il y a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":15216,"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_post_was_ever_published":false,"_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":"Une #supernova a frapp\u00e9 notre #plan\u00e8te il y a environ 2,6 millions d'ann\u00e9es @laterredufutur","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22,21],"tags":[2700,117,111,368,6419,3520],"class_list":["post-15215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","category-evenement-brutal","tag-cosmos","tag-espace","tag-ondes","tag-rayons-cosmiques","tag-rayons-x","tag-supernova","wpcat-22-id","wpcat-21-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/supernova.jpg?fit=640%2C422&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-3Xp","jetpack-related-posts":[{"id":17298,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-supernova-serait-a-lorigine-dune-vaste-extinction-sur-terre-il-y-a-26-millions-dannees\/","url_meta":{"origin":15215,"position":0},"title":"Une supernova serait \u00e0 l&rsquo;origine d&rsquo;une vaste extinction sur Terre il y a 2,6 millions d&rsquo;ann\u00e9es","author":"Admin","date":"26 d\u00e9cembre 2018","format":false,"excerpt":"Depuis de nombreuses ann\u00e9es, les scientifiques \u00e9tudient comment les supernovas pourraient affecter la vie sur Terre. Les supernovas sont des \u00e9v\u00e9nements extr\u00eamement puissants et, en fonction de leur proximit\u00e9 avec la Terre, ils pourraient avoir des cons\u00e9quences allant du cataclysmique \u00e0 l\u2019inconnu. Mais maintenant, les scientifiques derri\u00e8re un nouveau papier\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/Supernova.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/Supernova.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/Supernova.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/Supernova.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/Supernova.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":22413,"url":"https:\/\/www.laterredufutur.com\/accueil\/notre-planete-traverse-actuellement-les-debris-danciennes-supernovas\/","url_meta":{"origin":15215,"position":1},"title":"Notre plan\u00e8te traverse actuellement les d\u00e9bris d&rsquo;anciennes supernovas","author":"Admin","date":"21 avril 2021","format":false,"excerpt":"De la poussi\u00e8re radioactive enfouie profond\u00e9ment dans les oc\u00e9ans sugg\u00e8re que la Terre se d\u00e9place \u00e0 travers un nuage massif laiss\u00e9 par une \u00e9toile qui a explos\u00e9e, une ou plusieurs supernovas. Depuis 33 000 ans, la Terre est ensemenc\u00e9 avec un isotope rare de fer produit dans les supernova. Ce\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\/2021\/04\/supernova-terre.jpg?fit=1200%2C630&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/supernova-terre.jpg?fit=1200%2C630&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/supernova-terre.jpg?fit=1200%2C630&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/supernova-terre.jpg?fit=1200%2C630&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/supernova-terre.jpg?fit=1200%2C630&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":19220,"url":"https:\/\/www.laterredufutur.com\/accueil\/et-si-la-bipedie-humaine-avait-son-origine-dans-lexplosion-dune-supernova-il-y-a-plusieurs-millions-dannees\/","url_meta":{"origin":15215,"position":2},"title":"Et si la bip\u00e9die humaine avait son origine dans l&rsquo;explosion d&rsquo;une supernova, il y a plusieurs millions d&rsquo;ann\u00e9es ?","author":"Admin","date":"29 mai 2019","format":false,"excerpt":"Les humains et nos parents primates diff\u00e8rent \u00e0 bien des \u00e9gards, mais le fait que nous marchions sur deux jambes est l\u2019un des plus \u00e9vidents. C'est pr\u00e9cis\u00e9ment du comment nos anc\u00eatres ont d\u00e9velopp\u00e9 ce trait reste un myst\u00e8re toujours d\u00e9battu. Aujourd'hui, une nouvelle id\u00e9e \u00e9merge. Et si l\u2019un de ces\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/05\/bipedie-supernova-incendie.jpg?fit=1024%2C512&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/05\/bipedie-supernova-incendie.jpg?fit=1024%2C512&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/05\/bipedie-supernova-incendie.jpg?fit=1024%2C512&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/05\/bipedie-supernova-incendie.jpg?fit=1024%2C512&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":21208,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-etoile-a-65-annees-lumieres-de-la-terre-a-probablement-cause-une-extinction-de-masse-sur-notre-planete\/","url_meta":{"origin":15215,"position":3},"title":"Une \u00e9toile \u00e0 65 ann\u00e9es lumi\u00e8res de la Terre a probablement caus\u00e9 une extinction de masse sur notre plan\u00e8te","author":"Admin","date":"21 ao\u00fbt 2020","format":false,"excerpt":"Selon des chercheurs de l'Universit\u00e9 de l'Illinois, une supernova \u00e0 65 ann\u00e9es-lumi\u00e8re de la Terre a probablement provoqu\u00e9 un \u00e9v\u00e9nement d'extinction de masse au cours de la p\u00e9riode du D\u00e9vonien sup\u00e9rieur, il y a 359 millions d'ann\u00e9es. Les chercheurs ont trouv\u00e9 des isotopes radioactifs dans les roches qui pourraient \u00eatre\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae.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\/2020\/08\/supernovae.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":21244,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-terre-se-deplace-actuellement-a-travers-les-debris-radioactifs-danciennes-etoiles\/","url_meta":{"origin":15215,"position":4},"title":"La Terre se d\u00e9place actuellement \u00e0 travers les d\u00e9bris radioactifs d&rsquo;anciennes \u00e9toiles","author":"Admin","date":"2 septembre 2020","format":false,"excerpt":"Notre plan\u00e8te est recouverte de poussi\u00e8re d'anciennes supernovae, selon de nouvelles recherches. Les scientifiques ont trouv\u00e9 de nouvelles preuves que la Terre se d\u00e9place \u00e0 travers les restes d'anciennes \u00e9toiles depuis au moins 33 000 ans. Dans une nouvelle \u00e9tude publi\u00e9e dans la revue Proceedings of the National Academy of\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\/2020\/08\/supernovae-%C3%A9toiles.jpg?fit=1200%2C882&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae-%C3%A9toiles.jpg?fit=1200%2C882&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae-%C3%A9toiles.jpg?fit=1200%2C882&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae-%C3%A9toiles.jpg?fit=1200%2C882&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/supernovae-%C3%A9toiles.jpg?fit=1200%2C882&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":10553,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-astronomes-decouvrent-la-supernova-la-plus-lumineuse-jamais-observee\/","url_meta":{"origin":15215,"position":5},"title":"Les astronomes d\u00e9couvrent la supernova la plus lumineuse jamais observ\u00e9e","author":"Admin","date":"15 janvier 2016","format":false,"excerpt":"Une nouvelle \u00e9tude publi\u00e9e dans la revue Science pr\u00e9sente ASAS-SN-15lh, une supernova \u00e0 la luminosit\u00e9 in\u00e9gal\u00e9e, 570 fois plus puissante que celle de notre Soleil. Sur l'\u00e9chelle de la luminosit\u00e9, les supernovas arrivent au sommet. Ces manifestations cons\u00e9quentes \u00e0 l'explosion d'une \u00e9toile en fin de vie se caract\u00e9risent en effet\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\/01\/supernova-asas-sn-15lh-observee-juin-2015-chili.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\/2016\/01\/supernova-asas-sn-15lh-observee-juin-2015-chili.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/supernova-asas-sn-15lh-observee-juin-2015-chili.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/supernova-asas-sn-15lh-observee-juin-2015-chili.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/supernova-asas-sn-15lh-observee-juin-2015-chili.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15215","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=15215"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15215\/revisions"}],"predecessor-version":[{"id":15217,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15215\/revisions\/15217"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/15216"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=15215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=15215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=15215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}