{"id":9552,"date":"2015-11-24T18:50:34","date_gmt":"2015-11-24T17:50:34","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=9552"},"modified":"2015-11-24T18:50:34","modified_gmt":"2015-11-24T17:50:34","slug":"mars-pourra-bientot-obtenir-des-anneaux-comme-saturne","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/mars-pourra-bientot-obtenir-des-anneaux-comme-saturne\/","title":{"rendered":"Mars pourra bient\u00f4t obtenir des anneaux comme Saturne"},"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 style=\"text-align: justify;\">L&rsquo;une des deux lunes de Mars pourrait se d\u00e9sint\u00e9grer et ses d\u00e9bris devraient alors former un anneau.<\/p>\n<p style=\"text-align: justify;\">Phobos, une des deux lunes de Mars, pourrait se d\u00e9sint\u00e9grer d&rsquo;ici 20 \u00e0 40 millions d&rsquo;ann\u00e9es et ses d\u00e9bris devraient alors former un anneau autours de la plan\u00e8te rouge, selon une \u00e9tude publi\u00e9e lundi dans la revue britannique Nature Geoscience.<\/p>\n<p style=\"text-align: justify;\">Une lune de 27 km.<\/p>\n<p style=\"text-align: justify;\">Phobos est la plus grande et la plus proche des deux lunes de Mars, l&rsquo;autre \u00e9tant D\u00e9imos. De forme irr\u00e9guli\u00e8re, elle mesure 27 km, dans sa partie la plus large. Ces derni\u00e8res ann\u00e9es, des survols de Phobos par la sonde europ\u00e9enne Mars Express ont permis d&rsquo;\u00e9mettre des hypoth\u00e8ses sur sa composition. Cette lune serait pour l&rsquo;essentiel constitu\u00e9e d&rsquo;un tas de d\u00e9bris, avec de grands espaces entre les blocs rocheux qui composent l&rsquo;int\u00e9rieur de la lune. Environ un quart \u00e0 un tiers de Phobos serait compos\u00e9 d&rsquo;espace vide.<\/p>\n<p style=\"text-align: justify;\">Une collision in\u00e9luctable.<\/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 style=\"text-align: justify;\">De plus, l&rsquo;orbite de Phobos est une spirale qui va en se resserrant (contrairement \u00e0 notre lune, qui s&rsquo;\u00e9loigne de la Terre), se rapprochant inexorablement de Mars sur laquelle la plan\u00e8te finira, un jour, par s&rsquo;\u00e9craser. \u00ab\u00a0Les scientifiques savent depuis plusieurs d\u00e9cennies que Phobos se rapproche lentement de Mars, \u00e0 une vitesse de quelques centim\u00e8tres par an\u00a0\u00bb, explique Benjamin Black, de l&rsquo;universit\u00e9 am\u00e9ricaine Berkeley, coauteur de cette \u00e9tude. Benjamin Black et Tushar Mittal, de l&rsquo;universit\u00e9 de New York, ont d\u00e9duit quelle pourrait \u00eatre la fin de la plan\u00e8te, \u00e0 partir de donn\u00e9es d&rsquo;observation.<\/p>\n<p style=\"text-align: justify;\">Un anneau semblable \u00e0 ceux de Saturne.<\/p>\n<p style=\"text-align: justify;\">Les chercheurs pensent que les composants les moins denses de Phobos finiront par se disloquer d&rsquo;ici 20 \u00e0 40 millions d&rsquo;ann\u00e9es quand l&rsquo;effet de la force gravitationnelle de Mars deviendra trop fort du fait de la proximit\u00e9 des deux plan\u00e8tes. Ces composants se disperseront alors pour former un anneau. Selon l&rsquo;\u00e9tude, ce nouvel anneau accompagnera Mars pendant des millions d&rsquo;ann\u00e9es. \u00ab\u00a0Cet anneau pourra avoir une dur\u00e9e de vie de 1 \u00e0 100 millions d&rsquo;ann\u00e9es\u00a0\u00bb, pr\u00e9cise Benjamin Black. Selon les chercheurs, le futur anneau de Mars pourrait avoir une densit\u00e9 semblable \u00e0 ceux de Saturne, compos\u00e9s de poussi\u00e8res et de glaces.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.laterredufutur.com\/accueil\/\" target=\"_blank\">TDF\u00a0<\/a><\/p>\n<p style=\"text-align: justify;\">source :\u00a0<a href=\"http:\/\/www.europe1.fr\/\" target=\"_blank\">http:\/\/www.europe1.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"9552\">(367)<\/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>L&rsquo;une des deux lunes de Mars pourrait se d\u00e9sint\u00e9grer et ses d\u00e9bris devraient alors former un anneau. Phobos, une des&#8230;<\/p>\n","protected":false},"author":1,"featured_media":9553,"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":"#Mars pourra bient\u00f4t obtenir des #anneaux comme #Saturne @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},"jetpack_post_was_ever_published":false},"categories":[22],"tags":[5146,4326,2312,928,122,123,5147,1628],"class_list":["post-9552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-anneau","tag-anneaux","tag-collision","tag-debris","tag-lune","tag-mars","tag-phobos","tag-saturne","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/mars-anneaux.jpg?fit=1024%2C415&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-2u4","jetpack-related-posts":[{"id":24404,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-lune-perdue-pourrait-enfin-resoudre-letrange-mystere-de-saturne-et-de-ses-anneaux\/","url_meta":{"origin":9552,"position":0},"title":"Une lune perdue pourrait enfin r\u00e9soudre l&rsquo;\u00e9trange myst\u00e8re de Saturne et de ses anneaux","author":"Admin","date":"15 septembre 2022","format":false,"excerpt":"De tous les anneaux du syst\u00e8me solaire, ceux de Saturne sont, sans conteste, les plus spectaculaires. Contrairement aux minces cercles de poussi\u00e8re et de roche qui encerclent Jupiter, Uranus, Neptune et m\u00eame une plan\u00e8te naine de la ceinture de Kuiper nomm\u00e9e Haumea, le syst\u00e8me d'anneaux de Saturne, aux couleurs particuli\u00e8res,\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\/2022\/09\/lune-anneaux-saturne.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\/2022\/09\/lune-anneaux-saturne.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/lune-anneaux-saturne.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/lune-anneaux-saturne.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23463,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-terre-pourrait-voir-se-former-ses-propres-anneaux-de-debris-spatiaux\/","url_meta":{"origin":9552,"position":1},"title":"La Terre pourrait voir se former ses propres anneaux de d\u00e9bris spatiaux","author":"Admin","date":"26 novembre 2021","format":false,"excerpt":"Des scientifiques am\u00e9ricains ont propos\u00e9 de former un anneau de d\u00e9bris autour de la Terre. Les experts l'ont compar\u00e9 aux anneaux de Saturne, mais l'activit\u00e9 principale du projet sera de nettoyer l'espace extra-atmosph\u00e9rique des objets dangereux. Selon le professeur en robotique Jake Abbott, la technologie moderne permet de manipuler des\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\/11\/terre-anneaux-debrits-1.jpg?fit=1024%2C764&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/terre-anneaux-debrits-1.jpg?fit=1024%2C764&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/terre-anneaux-debrits-1.jpg?fit=1024%2C764&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/terre-anneaux-debrits-1.jpg?fit=1024%2C764&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":26246,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-terre-a-probablement-ete-dotee-dun-anneau-qui-est-progressivement-retombe-sur-terre\/","url_meta":{"origin":9552,"position":2},"title":"La Terre a probablement \u00e9t\u00e9 dot\u00e9e d&rsquo;un anneau qui est progressivement retomb\u00e9 sur Terre","author":"Admin","date":"24 septembre 2024","format":false,"excerpt":"Il fut un temps o\u00f9 la Terre \u00e9tait peut-\u00eatre dot\u00e9e d'un anneau plan\u00e9taire qui lui \u00e9tait propre. Cet anneau hypoth\u00e9tique n'a pas dur\u00e9 longtemps, d'un point de vue cosmique : quelques dizaines de millions d'ann\u00e9es seulement. Mais il a \u00e9t\u00e9 suffisamment long pour laisser une trace durable dans les archives\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4962,"url":"https:\/\/www.laterredufutur.com\/accueil\/on-a-marche-sur-la-lune\/","url_meta":{"origin":9552,"position":3},"title":"On a march\u00e9 sur la Lune","author":"Admin","date":"20 juillet 2009","format":false,"excerpt":"On a march\u00e9 sur la Lune, c'\u00e9tait il y a 40 ans aujourd'hui. Houston, 20 juillet 1969. L'atmosph\u00e8re est oppressante dans la salle de contr\u00f4le de la Nasa. Le souffle court, le coeur battant, ing\u00e9nieurs et techniciens ont les yeux riv\u00e9s sur leurs ordinateurs. D'il y a 40 ans \u00e0\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\/04\/armstrong.jpg?fit=400%2C307&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":15127,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-images-fantastiques-de-la-sonde-la-sonde-cassini\/","url_meta":{"origin":9552,"position":4},"title":"Les images fantastiques de la sonde Cassini","author":"Admin","date":"2 mai 2017","format":false,"excerpt":"En orbite autour de Saturne depuis 2004, la sonde am\u00e9ricaine Cassini s\u2019est aventur\u00e9e entre la surface de la plan\u00e8te gazeuse et l\u2019int\u00e9rieur de ses anneaux, une zone \u00e0 risque jusqu\u2019\u00e0 pr\u00e9sent inexplor\u00e9e. Elle a repris contact avec la NASA jeudi 27 avril 2017 pour livrer des images in\u00e9dites. LA PREMI\u00c8RE\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\/2017\/05\/cassini-saturne.jpg?fit=805%2C453&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/cassini-saturne.jpg?fit=805%2C453&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/cassini-saturne.jpg?fit=805%2C453&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/cassini-saturne.jpg?fit=805%2C453&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":18152,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-les-anneaux-de-saturne-cree-un-mystere-de-plus\/","url_meta":{"origin":9552,"position":5},"title":"Quand les anneaux de Saturne cr\u00e9\u00e9 un myst\u00e8re de plus&#8230;","author":"Admin","date":"29 janvier 2019","format":false,"excerpt":"Parmi les anneaux des quatre plan\u00e8tes g\u00e9antes gazeuses de notre syst\u00e8me solaire ils sont reconnaissables entre tous.Tous les grands noms de l\u2019astronomie se sont pench\u00e9s sur les anneaux de Saturne pour essayer de les comprendre. Mais certaines publications scientifiques posent plus de questions qu\u2019elles n\u2019en r\u00e9solvent\u2026 En utilisant les donn\u00e9es\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\/2017\/05\/saturne.jpg?fit=1100%2C578&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/saturne.jpg?fit=1100%2C578&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/saturne.jpg?fit=1100%2C578&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/saturne.jpg?fit=1100%2C578&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/saturne.jpg?fit=1100%2C578&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9552","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=9552"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9552\/revisions"}],"predecessor-version":[{"id":9554,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9552\/revisions\/9554"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/9553"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=9552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=9552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=9552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}