{"id":24327,"date":"2024-01-16T23:00:00","date_gmt":"2024-01-16T23:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/benin\/?p=24327"},"modified":"2024-01-16T22:23:53","modified_gmt":"2024-01-16T22:23:53","slug":"une-gigantesque-tempete-de-poussiere-photographiee-sur-mars","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars","title":{"rendered":"Une Gigantesque Temp\u00eate de Poussi\u00e8re Photographi\u00e9e sur Mars"},"content":{"rendered":"

Africa-Press – Benin. <\/strong><\/span>L\u2019orbiteur chinois Tianwen-1 a repe\u0301re\u0301 une e\u0301norme tempe\u0302te de poussie\u0300re sur Mars, pre\u0300s d\u2019Olympus Mons, la plus grande montagne du Syste\u0300me solaire. L\u2019e\u0301ve\u0300nement a e\u0301te\u0301 capture\u0301 par la came\u0301ra MoRIC a\u0300 moyenne re\u0301solution de la sonde il y a environ un an.<\/b>
\nComment se forment les tempe\u0302tes sur Mars ?<\/b><\/p>\n

Les tempe\u0302tes de poussie\u0300re sur Mars sont un phe\u0301nome\u0300ne atmosphe\u0301rique complexe influence\u0301 par plusieurs facteurs. Pour rappel, la plane\u0300te rouge a une atmosphe\u0300re beaucoup plus fine que celle de la Terre, compose\u0301e principalement de dioxyde de carbone avec des traces d\u2019azote et d\u2019argon. En raison de cette faible densite\u0301 atmosphe\u0301rique, le vent sur Mars peut avoir des effets plus prononce\u0301s sur les particules de poussie\u0300re. Ces derniers sont influence\u0301s par la topographie de la plane\u0300te et peuvent e\u0302tre particulie\u0300rement forts dans les re\u0301gions vallonne\u0301es.<\/p>\n

Les tempe\u0302tes de poussie\u0300re sur Mars sont e\u0301galement souvent associe\u0301es a\u0300 des variations saisonnie\u0300res. Pendant l\u2019e\u0301te\u0301 martien, lorsque la plane\u0300te est plus proche du Soleil dans son orbite elliptique, l\u2019augmentation de l\u2019e\u0301nergie solaire entrai\u0302ne un re\u0301chauffement de la surface, cre\u0301ant ainsi des conditions propices a\u0300 la formation de tempe\u0302tes de poussie\u0300re.<\/p>\n

Nous savons e\u0301galement que ces tempe\u0302tes peuvent parfois e\u0302tre de\u0301clenche\u0301es par des tourbillons de poussie\u0300re plus petits. Ces derniers peuvent e\u0302tre forme\u0301s par des contrastes thermiques a\u0300 la surface de Mars, cre\u0301ant des zones ou\u0300 l\u2019air chaud et l\u2019air froid se rencontrent.<\/p>\n

Une fois initie\u0301es, ces tempe\u0302tes de poussie\u0300re peuvent alors s\u2019intensifier rapidement, enveloppant parfois toute la plane\u0300te pendant des semaines. Ces phe\u0301nome\u0300nes atmosphe\u0301riques ont e\u0301te\u0301 e\u0301tudie\u0301s de pre\u0300s par les missions martiennes, telles que les rovers et les sondes, pour mieux comprendre les me\u0301canismes et la dynamique de l\u2019atmosphe\u0300re martienne.<\/p>\n

Une vue magnifique depuis l\u2019orbite<\/b><\/p>\n

L\u2019orbiteur chinois Tianwen-1 a re\u0301cemment e\u0301te\u0301 te\u0301moin de l\u2019un de ces phe\u0301nome\u0300nes. Une image de la tempe\u0302te a e\u0301te\u0301 traite\u0301e par Andrea Luck, a\u0300 l\u2019aide des donne\u0301es du syste\u0300me chinois de diffusion des donne\u0301es lunaires et plane\u0301taires. Il a ensuite partage\u0301 les images sur X. Une version plus grande est e\u0301galement disponible sur Flickr.<\/p>\n

Un danger pour les rovers<\/b><\/p>\n

Rappelons que ces tempe\u0302tes n\u2019ont pas e\u0301pargne\u0301 les diffe\u0301rents engins envoye\u0301s sur place. Le rover Opportunity en avait en particulier fait les frais en 2018. Cette tempe\u0302te avait e\u0301te\u0301 l\u2019une des plus importantes jamais enregistre\u0301es sur la plane\u0300te rouge, obscurcissant le ciel martien pendant des semaines. Or, l\u2019e\u0301nergie solaire e\u0301tait essentielle pour alimenter les panneaux solaires du ve\u0301hicule. Ce dernier avait alors e\u0301te\u0301 contraint de passer en faible consommation d\u2019e\u0301nergie. Malheureusement, les inge\u0301nieurs de la mission n\u2019avaient pas re\u0301ussi a\u0300 re\u0301tablir le contact.<\/p>\n

Re\u0301cemment, le rover chinois Zhurong, qui e\u0301tait entre\u0301 en hibernation en mai 2022 et devait se re\u0301veiller en de\u0301cembre de la me\u0302me anne\u0301e, avait e\u0301galement \u00ab succombe\u0301 \u00bb pour les me\u0302mes raisons.<\/p>\n

Pour plus d’informations et d’analyses sur la Benin<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Benin. L\u2019orbiteur chinois Tianwen-1 a repe\u0301re\u0301 une e\u0301norme tempe\u0302te de poussie\u0300re sur Mars, pre\u0300s d\u2019Olympus Mons, la plus grande montagne du Syste\u0300me solaire. L\u2019e\u0301ve\u0300nement a e\u0301te\u0301 capture\u0301 par la came\u0301ra MoRIC a\u0300 moyenne re\u0301solution de la sonde il y a environ un an. Comment se forment les tempe\u0302tes sur Mars ? Les tempe\u0302tes […]<\/p>\n","protected":false},"author":82,"featured_media":24326,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,50,45],"class_list":["post-24327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-benin","tag-benin"],"yoast_head":"\nUne Gigantesque Temp\u00eate de Poussi\u00e8re Photographi\u00e9e sur Mars - B\u00e9nin<\/title>\n<meta name=\"description\" content=\"L\u2019orbiteur chinois Tianwen-1 a repe\u0301re\u0301 une e\u0301norme tempe\u0302te de poussie\u0300re sur Mars, pre\u0300s d\u2019Olympus Mons, la plus gr ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une Gigantesque Temp\u00eate de Poussi\u00e8re Photographi\u00e9e sur Mars\" \/>\n<meta property=\"og:description\" content=\"L\u2019orbiteur chinois Tianwen-1 a repe\u0301re\u0301 une e\u0301norme tempe\u0302te de poussie\u0300re sur Mars, pre\u0300s d\u2019Olympus Mons, la plus gr ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\" \/>\n<meta property=\"og:site_name\" content=\"B\u00e9nin\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-16T23:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/benin\/sites\/46\/2024\/01\/sm_1705430952.010066.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"945\" \/>\n\t<meta property=\"og:image:height\" content=\"594\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/benin\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Une Gigantesque Temp\u00eate de Poussi\u00e8re Photographi\u00e9e sur Mars\",\"datePublished\":\"2024-01-16T23:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\"},\"wordCount\":598,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/benin\/sites\/46\/2024\/01\/sm_1705430952.010066.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Benin\",\"B\u00e9nin\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\",\"url\":\"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/une-gigantesque-tempete-de-poussiere-photographiee-sur-mars\",\"name\":\"Une Gigantesque Temp\u00eate de Poussi\u00e8re Photographi\u00e9e sur Mars - 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