{"id":21044,"date":"2020-07-04T17:00:56","date_gmt":"2020-07-04T15:00:56","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=21044"},"modified":"2020-07-06T08:09:47","modified_gmt":"2020-07-06T06:09:47","slug":"il-y-a-des-milliards-de-terres-dans-notre-galaxie","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/il-y-a-des-milliards-de-terres-dans-notre-galaxie\/","title":{"rendered":"Il y a des milliards de Terres dans notre galaxie"},"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>Selon de nouvelles recherches, il pourrait y avoir jusqu&rsquo;\u00e0 six milliards de plan\u00e8tes semblables \u00e0 la Terre en orbite autour d&rsquo;\u00e9toiles dans notre galaxie.<\/p>\n<p>Notre Voie lact\u00e9e compte jusqu&rsquo;\u00e0 400 milliards d&rsquo;\u00e9toiles, dont 7% de type G. Cela signifie que moins de six milliards d&rsquo;\u00e9toiles peuvent avoir des plan\u00e8tes semblables \u00e0 la Terre dans notre galaxie.<\/p>\n<p>Par d\u00e9finition, les plan\u00e8tes semblables \u00e0 la Terre doivent avoir \u00e0 peu pr\u00e8s la taille de notre plan\u00e8te et \u00e9galement \u00eatre situ\u00e9es dans la zone habitable de leur syst\u00e8me d&rsquo;\u00e9toiles h\u00f4te &#8211; la distance \u00e0 laquelle une plan\u00e8te a le potentiel de contenir de l&rsquo;eau liquide, et donc la vie.<\/p>\n<p>\u00ab\u00a0L&rsquo;estimation de la fr\u00e9quence des diff\u00e9rents types de plan\u00e8tes autour d&rsquo;\u00e9toiles diff\u00e9rentes peut cr\u00e9er des contraintes importantes sur la formation des plan\u00e8tes et les th\u00e9ories de l&rsquo;\u00e9volution, et aider \u00e0 optimiser les futures missions d\u00e9di\u00e9es \u00e0 la recherche d&rsquo;exoplan\u00e8tes \u00ab\u00a0, a d\u00e9clar\u00e9 Michelle Kunimoto, chercheuse et co-auteur \u00e0 l&rsquo;UBC, dans le communiqu\u00e9.<\/p>\n<p>Kunimoto et ses collaborateurs ont utilis\u00e9 un algorithme pour comparer les listes de plan\u00e8tes pr\u00e9c\u00e9demment d\u00e9tect\u00e9es par les t\u00e9lescopes spatiaux Kepler chasseurs de plan\u00e8tes de la NASA \u00e0 celles qui apparaissaient lors du remplissage d&rsquo;exoplan\u00e8tes potentielles en orbite autour des \u00e9toiles trouv\u00e9es par Kepler.<\/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><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/jn9BZSCSfR8?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=fr-FR&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>Les chercheurs ont \u00e9galement examin\u00e9 l&rsquo;\u00ab\u00e9cart de rayon\u00bb des exoplan\u00e8tes, qui est le fait qu&rsquo;il est peu probable que les plan\u00e8tes qui gravitent autour de leur \u00e9toile en moins de 100 jours terrestres soient entre 1,5 et deux fois celles de la Terre.<\/p>\n<p>Ils ont d\u00e9couvert que la plage de p\u00e9riodes orbitales repr\u00e9sent\u00e9e par \u00abl&rsquo;\u00e9cart de rayon\u00bb \u00e9tait en r\u00e9alit\u00e9 beaucoup plus \u00e9troite qu&rsquo;on ne le pensait pr\u00e9c\u00e9demment, ce qui pourrait nous aider \u00e0 combler les lacunes dans notre compr\u00e9hension de l&rsquo;\u00e9volution des plan\u00e8tes au fil du temps.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\" target=\"_blank\" rel=\"noopener noreferrer\">Terra Projects<\/a><\/p>\n<p>Source : <a href=\"https:\/\/strangesounds.org\/2020\/06\/6-billion-earths-galaxy-astronomy.html\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/strangesounds.org\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"21044\">(506)<\/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>Selon de nouvelles recherches, il pourrait y avoir jusqu&rsquo;\u00e0 six milliards de plan\u00e8tes semblables \u00e0 la Terre en orbite autour&#8230;<\/p>\n","protected":false},"author":1,"featured_media":18742,"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":"Il y a des milliards de #Terres dans notre #galaxie @laterredufutur.com Terra Projects","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],"tags":[2371,125,362,875,736,5210,684],"class_list":["post-21044","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-exoplanetes","tag-galaxie","tag-habitable","tag-kepler","tag-nombre","tag-terres","tag-video","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1280%2C720&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-5tq","jetpack-related-posts":[{"id":1219,"url":"https:\/\/www.laterredufutur.com\/accueil\/17-milliards-de-planetes-de-taille-terrestre\/","url_meta":{"origin":21044,"position":0},"title":"17 milliards de plan\u00e8tes de taille terrestre","author":"Admin","date":"10 janvier 2013","format":false,"excerpt":"Nous sommes tr\u00e8s probablement \u00e0 la veille d'une d\u00e9couverte d'envergure, une plan\u00e8te de type Terre. A lire ce qui suit, cela semble \u00eatre une question de petites ann\u00e9es, mois ou bien m\u00eame quelques jours.\u00a017 milliards de plan\u00e8tes de taille terrestre dans la Voie lact\u00e9e. Elles ne sont pas toutes situ\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\/2011\/05\/gliese581.jpg?fit=300%2C216&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1613,"url":"https:\/\/www.laterredufutur.com\/accueil\/2-milliards-de-planetes-terre-dans-notre-galaxie\/","url_meta":{"origin":21044,"position":1},"title":"2 milliards de plan\u00e8tes Terre dans notre galaxie","author":"Admin","date":"5 novembre 2013","format":false,"excerpt":"A l'heure o\u00f9 le film Gravity \u2013 qui raconte une exp\u00e9dition \u00e0 bord d'une navette spatiale qui tourne \u00e0 la catastrophe \u2013 fait salle comble et a d\u00e9j\u00e0 propuls\u00e9 plus d'un million de spectateurs fran\u00e7ais dans l'espace, une \u00e9tude estime qu'au moins 2 milliards de plan\u00e8tes de taille terrestre, en\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\/2013\/11\/exoplanete-type-terre.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":11669,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-planetes-habitables-documentaire-choc\/","url_meta":{"origin":21044,"position":2},"title":"Les Plan\u00e8tes Habitables [Documentaire Choc]","author":"Admin","date":"12 avril 2016","format":false,"excerpt":"Sommes nous seuls dans l'univers ou bien y a t il d'autres plan\u00e8tes Terre, de tout temps on s'est pos\u00e9 la question. On a enfin le pouvoir d'avoir la r\u00e9ponse. Sur les 50 milliards d'\u00e9toiles de type solaire de notre galaxie, une sur 5 est suppos\u00e9e avoir une plan\u00e8te habitable.\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\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":19541,"url":"https:\/\/www.laterredufutur.com\/accueil\/60-milliards-de-planetes-habitables-dans-notre-galaxie\/","url_meta":{"origin":21044,"position":3},"title":"60 milliards de plan\u00e8tes habitables dans notre galaxie","author":"Admin","date":"9 septembre 2019","format":false,"excerpt":"Si l\u2019humanit\u00e9 doit un jour d\u00e9m\u00e9nager, elle aura l\u2019embarras du choix. Notre galaxie, la Voie lact\u00e9e, abriterait en effet plus de 60 milliard d\u2019exoplan\u00e8tes habitables. Le Kepler Spacecraft, d\u00e9partement de la Nasa charg\u00e9 de r\u00e9f\u00e9rencer les plan\u00e8tes habitables a publi\u00e9 une nouvelle \u00e9tude. Jusque l\u00e0, la communaut\u00e9 scientifique estimait que\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\/01\/exoplan%C3%A8te-ocean.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\/01\/exoplan%C3%A8te-ocean.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/exoplan%C3%A8te-ocean.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/exoplan%C3%A8te-ocean.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/exoplan%C3%A8te-ocean.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1208,"url":"https:\/\/www.laterredufutur.com\/accueil\/letoile-tau-ceti-abrite-au-moins-une-planete-habitable\/","url_meta":{"origin":21044,"position":4},"title":"L&rsquo;\u00e9toile Tau Ceti abrite au moins une plan\u00e8te habitable","author":"Admin","date":"30 d\u00e9cembre 2012","format":false,"excerpt":"Noctambules et astronomes ont longtemps cru que Tau Ceti, \u00e9toile visible \u00e0 l'\u0153il nu depuis la Terre, brillait seule dans la nuit. Des chercheurs viennent d'y d\u00e9couvrir cinq plan\u00e8tes en orbite, dont l'une situ\u00e9e en zone \"habitable\", selon une \u00e9tude publi\u00e9e mercredi 19 d\u00e9cembre 2012 par l'universit\u00e9 britannique du Hertfordshire.","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":490,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-monde-extraterrestre\/","url_meta":{"origin":21044,"position":5},"title":"Un monde extraterrestre","author":"Admin","date":"1 septembre 2011","format":false,"excerpt":"Notre univers, un vaste domaine d'exploration pour notre civilisation future, dans un monde qui aurait environ 200 milliards de galaxies et une galaxie comprendrait 200 milliards d'\u00e9toiles. Il est \u00e9galement estim\u00e9 qu'il y aurait 1570 milliards de plan\u00e8tes dans notre seule galaxie. L'ironie dans ces chiffres, c'est que cela serait\u2026","rel":"","context":"Dans &quot;Monde Futur&quot;","block_context":{"text":"Monde Futur","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/monde-futur\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21044","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=21044"}],"version-history":[{"count":2,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21044\/revisions"}],"predecessor-version":[{"id":21057,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21044\/revisions\/21057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/18742"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=21044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=21044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=21044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}