{"id":14106,"date":"2016-12-04T00:00:05","date_gmt":"2016-12-03T23:00:05","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=14106"},"modified":"2016-11-28T21:35:21","modified_gmt":"2016-11-28T20:35:21","slug":"mars-decouverte-dun-lac-gele-presque-aussi-grand-que-la-france","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/mars-decouverte-dun-lac-gele-presque-aussi-grand-que-la-france\/","title":{"rendered":"Mars : d\u00e9couverte d\u2019un lac gel\u00e9 presque aussi grand que la France"},"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;\">D\u00e9couvert dans la r\u00e9gion d\u2019Utopia Planitia, une r\u00e9gion temp\u00e9r\u00e9e de Mars, ce lac gel\u00e9 pourrait \u00eatre bien utile aux futurs astronautes qui se poseront sur la plan\u00e8te rouge\u2026<\/p>\n<p style=\"text-align: justify;\">Mars Odyssey, une sonde de la NASA, avait d\u00e9j\u00e0 inspect\u00e9 ce lac, situ\u00e9 dans un ancien crat\u00e8re, mais ses investigations avaient amen\u00e9 \u00e0 conclure que le lac \u00e9tait sec. Gr\u00e2ce \u00e0 son radar plus performant, elle a permis de mieux percer les secrets du sol martien et de r\u00e9v\u00e9ler que ce lac de plus de 3 000 km de large, plus vaste que l\u2019\u00c9tat du Nouveau Mexique, est en r\u00e9alit\u00e9 constitu\u00e9 d\u2019une couverture de glace de 80 \u00e0 170 m d\u2019\u00e9paisseur.<\/p>\n<p style=\"text-align: justify;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"14107\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/mars-decouverte-dun-lac-gele-presque-aussi-grand-que-la-france\/utopia-planitia\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?fit=431%2C349&amp;ssl=1\" data-orig-size=\"431,349\" 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=\"utopia-planitia\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?fit=300%2C243&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?fit=431%2C349&amp;ssl=1\" class=\"size-full wp-image-14107 aligncenter\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?resize=431%2C349\" alt=\"utopia-planitia\" width=\"431\" height=\"349\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?w=431&amp;ssl=1 431w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.png?resize=300%2C243&amp;ssl=1 300w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/p>\n<p style=\"text-align: justify;\">Cassie Stuurman, auteur principal d\u2019un article r\u00e9sumant les d\u00e9couvertes dans le journal Geophysical Research, explique que les fissures polygonales et les d\u00e9pressions dans le paysage de la r\u00e9gion attiraient d\u00e9j\u00e0 l\u2019attention des chercheurs depuis plusieurs d\u00e9cennies : \u00ab On se disait : on dirait qu\u2019il y a de la glace ici ! Mais ce qu\u2019on ignorait, c\u2019\u00e9tait la quantit\u00e9. \u00bb Sur Terre, de telles formes en surface r\u00e9v\u00e8lent la pr\u00e9sence de glace en profondeur. Comme dans l\u2019archipel arctique canadien, la terre se fissure sous l\u2019effet des mouvements de la glace sous-jacente, qui prend ou perd du volume en fonction des variations de temp\u00e9rature. Quant aux d\u00e9pressions, elles sont dues \u00e0 l\u2019enfoncement de la terre dans les espaces laiss\u00e9s vacants par la glace fondue.<\/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;\">Avec 50 % d\u2019eau gel\u00e9e, la glace de ce lac est relativement pure. Selon les chercheurs, le reste serait compos\u00e9 de poussi\u00e8re, de roches et d\u2019espaces creux. Ainsi, le lac contiendrait plus d\u2019eau que le Lac Sup\u00e9rieur, situ\u00e9 \u00e0 la fronti\u00e8re entre le Canada et les Etats-Unis, qui repr\u00e9sente la plus grande r\u00e9serve d\u2019eau douce du monde.<\/p>\n<p style=\"text-align: justify;\">Selon Cassie Stuurman, la glace se serait form\u00e9e par accumulation de chutes de neige au cours de l\u2019une des p\u00e9riodes glaciaires de Mars. Si cette eau ne semble jamais avoir \u00e9t\u00e9 \u00e0 l\u2019\u00e9tat liquide \u00e0 cause de la couche qui la recouvre, elle pourrait bien \u00eatre utile aux futurs astronautes qui se poseront sur la surface martienne. Contrairement aux p\u00f4les eux aussi recouverts de glace, Utopia Planitia est en effet une r\u00e9gion temp\u00e9r\u00e9e de la plan\u00e8te. Une fois ramen\u00e9e \u00e0 la surface, l\u2019eau ne pourrait se maintenir sous forme de glace et s\u2019\u00e9vaporerait, assurant un apport en eau liquide gigantesque, qui pourrait \u00e9galement permettre la cr\u00e9ation de l\u2019oxyg\u00e8ne et de l\u2019hydrog\u00e8ne servant de carburant aux fus\u00e9es.<\/p>\n<p>source : <a href=\"http:\/\/dailygeekshow.com\/marc-lac-gele-decouverte\/\" target=\"_blank\">http:\/\/dailygeekshow.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"14106\">(597)<\/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>D\u00e9couvert dans la r\u00e9gion d\u2019Utopia Planitia, une r\u00e9gion temp\u00e9r\u00e9e de Mars, ce lac gel\u00e9 pourrait \u00eatre bien utile aux futurs&#8230;<\/p>\n","protected":false},"author":1,"featured_media":14108,"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":"Mars : d\u00e9couverte d\u2019un lac gel\u00e9 presque aussi grand que la France @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],"tags":[333,6215,123,1106,2142,2039,6214],"class_list":["post-14106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-eau","tag-lac-gele","tag-mars","tag-mer","tag-mission","tag-planete-mars","tag-utopia-planitia","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/11\/Utopia-Planitia.jpg?fit=478%2C512&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-3Fw","jetpack-related-posts":[{"id":21427,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-scientifiques-ont-trouve-des-lacs-deau-salee-sur-mars\/","url_meta":{"origin":14106,"position":0},"title":"Des scientifiques ont trouv\u00e9 des lacs d&rsquo;eau sal\u00e9e sur Mars","author":"Admin","date":"2 octobre 2020","format":false,"excerpt":"Au p\u00f4le sud de Mars, des chercheurs italiens ont remarqu\u00e9 la pr\u00e9sence d'un grand lac entour\u00e9 de petits plans d'eau sal\u00e9e. En 2018, une \u00e9quipe de scientifiques italiens a rep\u00e9r\u00e9 un lac d'eau sal\u00e9e sur\u00a0Mars. Mesurant 20 kilom\u00e8tres de diam\u00e8tre, les chercheurs avaient toutefois \u00e9mis des r\u00e9serves concernant cette d\u00e9couverte.\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\/09\/mars.jpg?fit=1100%2C619&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/09\/mars.jpg?fit=1100%2C619&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/09\/mars.jpg?fit=1100%2C619&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/09\/mars.jpg?fit=1100%2C619&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/09\/mars.jpg?fit=1100%2C619&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":16897,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-immense-lac-deau-decouvert-sur-la-planete-mars\/","url_meta":{"origin":14106,"position":1},"title":"Un immense lac d&rsquo;eau d\u00e9couvert sur la plan\u00e8te Mars","author":"Admin","date":"25 juillet 2018","format":false,"excerpt":"Cela pourrait \u00eatre notre meilleure chance de trouver la vie sur la plan\u00e8te rouge.\u00a0 Nous savons enfin o\u00f9 se cachait toute cette eau martienne ! Les scientifiques italiens ont d\u00e9couvert un \u00e9norme r\u00e9servoir de liquide cach\u00e9 \u00e0 1,5 kilom\u00e8tre (0,93 mille) sous la calotte glaciaire polaire sud, s'\u00e9tendant sur 20\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\/07\/mars-eau-lac.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\/2018\/07\/mars-eau-lac.jpg?fit=620%2C349&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/07\/mars-eau-lac.jpg?fit=620%2C349&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":5882,"url":"https:\/\/www.laterredufutur.com\/accueil\/mars-pourrait-avoir-de-leau-liquide-salee\/","url_meta":{"origin":14106,"position":2},"title":"Mars pourrait avoir de l&rsquo;eau liquide sal\u00e9e","author":"Admin","date":"20 avril 2015","format":false,"excerpt":"Les chercheurs savent depuis longtemps qu'il y avait de l'eau sous forme de glace sur Mars. Maintenant, de nouvelles recherches de Mars rover Curiosity de la NASA montre qu'il est possible qu'il y ait de l'eau liquide \u00e0 proximit\u00e9 de la surface de Mars. L'explication est que de la substance\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\/eau-salee-liquide-sur-mars.jpg?fit=720%2C382&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/eau-salee-liquide-sur-mars.jpg?fit=720%2C382&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/eau-salee-liquide-sur-mars.jpg?fit=720%2C382&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/eau-salee-liquide-sur-mars.jpg?fit=720%2C382&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1998,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-future-de-micros-organismes-sur-mars\/","url_meta":{"origin":14106,"position":3},"title":"D\u00e9couverte future de micros-organismes sur Mars","author":"Admin","date":"15 mai 2014","format":false,"excerpt":"Des micro-organismes gel\u00e9s sur Mars Pourraient \u00eatre ramen\u00e9s \u00e0 la vie. Nous savons d\u00e9j\u00e0 que de l\u2019eau sous forme de glace est pr\u00e9sente aux p\u00f4les, mais aussi \u00e0 d\u2019autres latitudes sur la plan\u00e8te Mars. Des scientifiques laissent entendre que d\u2019importantes quantit\u00e9s d\u2019eau liquide auraient sillonn\u00e9 des canaux, devenus aujourd\u2019hui d\u2019\u00e9normes\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"Mars","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2012\/11\/mars3.jpg?fit=450%2C255&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":18677,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-le-lac-michigan-est-gele-et-morcele-en-mille-morceaux-de-glace\/","url_meta":{"origin":14106,"position":4},"title":"Quand le lac Michigan est gel\u00e9 et morcel\u00e9 en mille morceaux de glace","author":"Admin","date":"25 mars 2019","format":false,"excerpt":"Chaque printemps, un ph\u00e9nom\u00e8ne naturel se produit sur le lac Michigan aux \u00c9tats-Unis et offre des images surr\u00e9alistes. Gr\u00e2ce aux temp\u00e9ratures fluctuantes qu\u2019offre le mois de mars, la glace se brise en milliards de tranches cristallines. En janvier dernier, plusieurs millions d\u2019habitants du nord des \u00c9tats-Unis ont fait face \u00e0\u2026","rel":"","context":"Dans &quot;M\u00e9t\u00e9orologie&quot;","block_context":{"text":"M\u00e9t\u00e9orologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/meteorologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/glace-morcelee-mars2019-lac-michigan-10.jpg?fit=880%2C561&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/glace-morcelee-mars2019-lac-michigan-10.jpg?fit=880%2C561&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/glace-morcelee-mars2019-lac-michigan-10.jpg?fit=880%2C561&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/glace-morcelee-mars2019-lac-michigan-10.jpg?fit=880%2C561&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":26405,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-de-traces-dun-littoral-dun-ancien-ocean-sur-mars\/","url_meta":{"origin":14106,"position":5},"title":"D\u00e9couverte de traces d&rsquo;un littoral d&rsquo;un ancien oc\u00e9an sur Mars","author":"Admin","date":"19 novembre 2024","format":false,"excerpt":"Des chercheurs chinois utilisant les donn\u00e9es du rover Zhurong ont affirm\u00e9 avoir identifi\u00e9 la trace du littoral de l\u2019ancien oc\u00e9an qui se serait trouv\u00e9 sur Mars il y a plus de trois milliards d\u2019ann\u00e9es. Mars n\u2019aurait pas toujours \u00e9t\u00e9 cette plan\u00e8te aride et inhospitali\u00e8re. C\u2019est en tout cas ce 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\/2016\/06\/ocean-mars.jpg?fit=945%2C556&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/06\/ocean-mars.jpg?fit=945%2C556&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/06\/ocean-mars.jpg?fit=945%2C556&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/06\/ocean-mars.jpg?fit=945%2C556&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/14106","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=14106"}],"version-history":[{"count":2,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/14106\/revisions"}],"predecessor-version":[{"id":14110,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/14106\/revisions\/14110"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/14108"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=14106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=14106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=14106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}