{"id":12397,"date":"2016-05-29T19:23:08","date_gmt":"2016-05-29T17:23:08","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=12397"},"modified":"2016-05-29T19:23:08","modified_gmt":"2016-05-29T17:23:08","slug":"rosetta-detecte-des-ingredients-de-la-vie-dans-la-comete-tchouri","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/rosetta-detecte-des-ingredients-de-la-vie-dans-la-comete-tchouri\/","title":{"rendered":"Rosetta d\u00e9tecte des ingr\u00e9dients de la vie dans la com\u00e8te Tchouri"},"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;\">De la glycine et du phosphore, ingr\u00e9dients consid\u00e9r\u00e9s comme cruciaux pour l&rsquo;origine de la vie sur Terre, ont \u00e9t\u00e9 d\u00e9couverts dans la com\u00e8te 67P\/Tchourioumov-Gu\u00e9rassimenko, que la sonde Rosetta de l&rsquo;ESA explore depuis presque deux ans.<\/p>\n<p style=\"text-align: justify;\">C&rsquo;\u00e9tait l&rsquo;une des missions de Rosetta. La sonde de l&rsquo;Agence spatiale europ\u00e9enne (ESA) l&rsquo;a remplie. Elle a en effet d\u00e9cel\u00e9 deux ingr\u00e9dients essentiels \u00e0 la vie sur la Terre, la glycine et le phosphore, sur la com\u00e8te 67P\/Tchourioumov-Gu\u00e9rassimenko. Une d\u00e9couverte sans pr\u00e9c\u00e9dent.<\/p>\n<p style=\"text-align: justify;\">Alors que plus de 140 diff\u00e9rentes mol\u00e9cules organiques ont d\u00e9j\u00e0 \u00e9t\u00e9 identifi\u00e9es dans le milieu interstellaire, c&rsquo;est la premi\u00e8re fois que l&rsquo;on y d\u00e9tecte de la glycine, un acide amin\u00e9, et du phosphore, un \u00e9l\u00e9ment cl\u00e9 de l&rsquo;ADN et des membranes des cellules. Ces travaux, men\u00e9s avec Rosina, le spectrom\u00e8tre de la sonde europ\u00e9enne Rosetta en orbite autour de ce noyau com\u00e9taire, sont publi\u00e9s dans la revue am\u00e9ricaine ScienceAdvances.<\/p>\n<p style=\"text-align: justify;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"12399\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/rosetta-detecte-des-ingredients-de-la-vie-dans-la-comete-tchouri\/roseta-comete-tchouri\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete-tchouri.jpg?fit=650%2C528&amp;ssl=1\" data-orig-size=\"650,528\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"roseta-comete-tchouri\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete-tchouri.jpg?fit=650%2C528&amp;ssl=1\" class=\"alignnone size-full wp-image-12399\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete-tchouri.jpg?resize=650%2C528\" alt=\"roseta-comete-tchouri\" width=\"650\" height=\"528\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete-tchouri.jpg?w=650&amp;ssl=1 650w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete-tchouri.jpg?resize=300%2C244&amp;ssl=1 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<p style=\"text-align: justify;\">Les com\u00e8tes, ces v\u00e9hicules de la vie<\/p>\n<p style=\"text-align: justify;\">\u00ab\u00a0La multitude de mol\u00e9cules organiques d\u00e9j\u00e0 identifi\u00e9e par Rosina sur la com\u00e8te 67P\/Tchourioumov-Gu\u00e9rassimenko, auxquelles s&rsquo;ajoutent d\u00e9sormais la glycine et le phosphore -des ingr\u00e9dients fondamentaux de la vie-, confirment notre hypoth\u00e8se que les com\u00e8tes ont le potentiel d&rsquo;apporter les mol\u00e9cules essentielles de la chimie pr\u00e9biotique\u00a0\u00bb, souligne Matt Taylor, le responsable scientifique de la mission Rosetta de l&rsquo;Agence Spatiale Europ\u00e9enne (ESA).<\/p>\n<p style=\"text-align: justify;\">\u00ab\u00a0D\u00e9montrer que les noyaux com\u00e9taires sont des r\u00e9servoirs de mat\u00e9riaux primitifs dans le syst\u00e8me solaire et qu&rsquo;ils auraient pu transporter ces ingr\u00e9dients cl\u00e9 de la vie sur la Terre est l&rsquo;un des principaux objectifs de Rosetta et nous sommes ravis de ces r\u00e9sultats\u00a0\u00bb, ajoute-t-il.<\/p>\n<p style=\"text-align: justify;\">\u00ab\u00a0Premi\u00e8re d\u00e9tections certaine de la glycine\u00a0\u00bb<\/p>\n<p style=\"text-align: justify;\">Des traces de glycine, souvent trouv\u00e9e dans les prot\u00e9ines, avaient d\u00e9j\u00e0 \u00e9t\u00e9 mises en \u00e9vidence dans les poussi\u00e8res de la com\u00e8te Wild 2 ramen\u00e9es sur terre dans le cadre de la mission Stardust de la Nasa en 2004.<br \/>\nMaintenant, pour la premi\u00e8re fois, de multiples d\u00e9tections de cet acide amin\u00e9 ont confirm\u00e9 sa pr\u00e9sence dans les gaz et la vapeur d&rsquo;eau se d\u00e9gageant d&rsquo;un noyau com\u00e9taire. \u00ab\u00a0Il s&rsquo;agit de la premi\u00e8re d\u00e9tection certaine de glycine dans la mince atmosph\u00e8re d&rsquo;une com\u00e8te\u00a0\u00bb, souligne Kathrin Altwegg, de l&rsquo;universit\u00e9 de Berne en Suisse, chef du projet Rosina et principal auteur de ces travaux. La premi\u00e8re d\u00e9tection a eu lieu en octobre 2014 mais la plupart des mesures ont \u00e9t\u00e9 faites en ao\u00fbt 2015 pendant la p\u00e9rih\u00e9lie, lorsque l&rsquo;orbite de la com\u00e8te se trouvait au plus proche du soleil.<\/p>\n<p style=\"text-align: justify;\">L&rsquo;origine du phosphore pas encore d\u00e9termin\u00e9e<br \/>\nLa glycine est tr\u00e8s difficile \u00e0 d\u00e9tecter. Elle passe de l&rsquo;\u00e9tat solide \u00e0 l&rsquo;\u00e9tat gazeux sous les 150 degr\u00e9s Celsius, ce qui signifie que peu de cet acide amin\u00e9 se d\u00e9gage sous forme gazeuse \u00e0 la surface froide de la com\u00e8te, explique Kathrin Altwegg.<\/p>\n<p style=\"text-align: justify;\">source :\u00a0<a href=\"http:\/\/www.lexpress.fr\/actualite\/sciences\/rosetta-detecte-des-ingredients-de-la-vie-dans-la-comete-tchouri_1796778.html#xtor=AL-447\" target=\"_blank\">http:\/\/www.lexpress.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"12397\">(214)<\/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>De la glycine et du phosphore, ingr\u00e9dients consid\u00e9r\u00e9s comme cruciaux pour l&rsquo;origine de la vie sur Terre, ont \u00e9t\u00e9 d\u00e9couverts&#8230;<\/p>\n","protected":false},"author":1,"featured_media":12398,"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_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Rosetta d\u00e9tecte des ingr\u00e9dients de la vie dans la com\u00e8te Tchouri @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":[1521,3109,1776,1283,5173,2192,702,5884,4966,308],"class_list":["post-12397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-comete","tag-elements","tag-molecules","tag-orbite","tag-organiques","tag-rosetta","tag-sonde","tag-spectrometre","tag-tchouri","tag-vie","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/roseta-comete.jpg?fit=1000%2C560&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-3dX","jetpack-related-posts":[{"id":7346,"url":"https:\/\/www.laterredufutur.com\/accueil\/philae-sest-reveille-de-son-hibernation-sur-la-comete\/","url_meta":{"origin":12397,"position":0},"title":"Philae s&rsquo;est r\u00e9veill\u00e9 de son hibernation sur la com\u00e8te","author":"Admin","date":"15 juin 2015","format":false,"excerpt":"Apr\u00e8s sept mois sans donner de nouvelles, le robot largu\u00e9 sur une com\u00e8te par la sonde Rosetta a donn\u00e9 de ses nouvelles dans la nuit de samedi \u00e0 dimanche. Philae s'est r\u00e9veill\u00e9 apr\u00e8s sept mois d'hibernation sur la com\u00e8te 67P\/Tchourioumov-Guerassimenko. A 22h28 (20h28 GMT) samedi soir, le petit robot a\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\/06\/philae.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\/2015\/06\/philae.jpg?fit=805%2C453&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/06\/philae.jpg?fit=805%2C453&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/06\/philae.jpg?fit=805%2C453&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":13486,"url":"https:\/\/www.laterredufutur.com\/accueil\/exceptionnelle-video-de-la-descente-de-rosetta\/","url_meta":{"origin":12397,"position":1},"title":"Exceptionnelle Video de la descente de Rosetta","author":"Admin","date":"1 octobre 2016","format":false,"excerpt":"La sonde exp\u00e9di\u00e9e dans l'espace par l'Agence spatiale europ\u00e9enne s'est \u00e9cras\u00e9e dans un gouffre de la com\u00e8te Tchouri. Un saut de l'ange diffus\u00e9 en direct diff\u00e9r\u00e9. Un \u00e9v\u00e9nement tout \u00e0 fait historique. This is the end. Ce vendredi 30 septembre 2016, la sonde Rosetta de l'Agence spatiale europ\u00e9enne (ESA) a\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\/10\/tchouri.jpg?fit=599%2C446&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/10\/tchouri.jpg?fit=599%2C446&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/10\/tchouri.jpg?fit=599%2C446&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":2277,"url":"https:\/\/www.laterredufutur.com\/accueil\/a-la-conquete-de-la-comete-churyumov-gerasimenko\/","url_meta":{"origin":12397,"position":2},"title":"A la conqu\u00eate de la com\u00e8te Churyumov Gerasimenko","author":"Admin","date":"11 novembre 2014","format":false,"excerpt":"L'ach\u00e8vement d'un travail de plus de dix ans: ce 12 novembre, la sonde Rosetta, lanc\u00e9e le 2 mars 2004 \u00e0 l'assaut de la fameuse com\u00e8te en forme de canard 67P\/Tchourioumov-Gu\u00e9rassimenko (\u00abTchouri\u00bb pour les intimes) s'est s\u00e9par\u00e9 de Philae, autre sonde dont l'objectif est de se poser \u00e0 la surface de\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\/wordpress\/wp-content\/uploads\/2014\/11\/laterredufutur.com_photos_comete-churyumov-4.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":9005,"url":"https:\/\/www.laterredufutur.com\/accueil\/latmosphere-de-la-comete-tchouri-contient-de-loxygene\/","url_meta":{"origin":12397,"position":3},"title":"L\u2019atmosph\u00e8re de la com\u00e8te Tchouri contient de l\u2019oxyg\u00e8ne","author":"Admin","date":"7 novembre 2015","format":false,"excerpt":"L\u2019atmosph\u00e8re de la com\u00e8te Tchouri contient de l\u2019oxyg\u00e8ne, \u00ab\u2009surprise totale\u2009\u00bb pour les scientifiques La sonde europ\u00e9enne Rosetta, qui gravite autour de la com\u00e8te, a d\u00e9couvert de l\u2019oxyg\u00e8ne en abondance. Les scientifiques sont stup\u00e9faits. La sonde europ\u00e9enne Rosetta, qui gravite autour de la com\u00e8te Tchouri, a d\u00e9couvert de l\u2019oxyg\u00e8ne en abondance\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\/2014\/11\/laterredufutur.com_photos_mission-rosetta.jpg?fit=620%2C349&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2014\/11\/laterredufutur.com_photos_mission-rosetta.jpg?fit=620%2C349&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2014\/11\/laterredufutur.com_photos_mission-rosetta.jpg?fit=620%2C349&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":2147,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-sonde-rosetta-en-route-vers-une-comete-plus-etrange-que-prevue\/","url_meta":{"origin":12397,"position":4},"title":"La sonde Rosetta en route vers une com\u00e8te plus \u00e9trange que pr\u00e9vue","author":"Admin","date":"22 juillet 2014","format":false,"excerpt":"Alors que la sonde Rosetta se rapproche de plus en plus de son objectif, les scientifiques de l'Agence spatiale europ\u00e9enne (ESA) ont fait une d\u00e9couverte inattendue : la com\u00e8te Churyumov-Gerasimenko que Rosetta doit \u00e9tudier est compos\u00e9e de deux morceaux distincts. \u00a0","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":24429,"url":"https:\/\/www.laterredufutur.com\/accueil\/encelade-possede-les-six-elements-essentiels-a-la-vie\/","url_meta":{"origin":12397,"position":5},"title":"Encelade poss\u00e8de les six \u00e9l\u00e9ments essentiels \u00e0 la vie","author":"Admin","date":"25 septembre 2022","format":false,"excerpt":"La r\u00e9analyse de grains de roche glac\u00e9e provenant d'un anneau de Saturne - aliment\u00e9 par les panaches de glace de sa lune Encelade - a r\u00e9v\u00e9l\u00e9 la pr\u00e9sence de phosphore, le seul \u00e9l\u00e9ment essentiel \u00e0 la vie qui n'avait pas encore \u00e9t\u00e9 rep\u00e9r\u00e9. Encelade, la lune de Saturne, produit du\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\/Encelade.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\/2022\/09\/Encelade.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/Encelade.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/Encelade.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/Encelade.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\/12397","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=12397"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/12397\/revisions"}],"predecessor-version":[{"id":12400,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/12397\/revisions\/12400"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/12398"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=12397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=12397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=12397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}