{"id":69066,"date":"2025-06-10T12:00:00","date_gmt":"2025-06-10T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/experimenter-limpesanteur-pres-de-la-terre"},"modified":"2025-06-10T19:34:21","modified_gmt":"2025-06-10T19:34:21","slug":"experimenter-limpesanteur-pres-de-la-terre","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre","title":{"rendered":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace commence a\u0300 100 km au-dessus de nos te\u0302tes. A\u0300 peine l\u2019e\u0301paisseur d\u2019un zeste si l\u2019on compare la Terre a\u0300 une orange. La Station spatiale internationale (ISS) est quatre fois plus haut, mais encore mille fois plus proche que la Lune.<\/p>\n<p>Dans notre imaginaire, l\u2019espace est associe\u0301 a\u0300 l\u2019impesanteur gra\u0302ce a\u0300 laquelle les astronautes \u2013 ou la chanteuse Katy Perry \u2013 font des pirouettes e\u0301chevele\u0301es. Est-ce a\u0300 dire que quelques centaines de kilome\u0300tres suffisent pour ne plus ressentir la gravite\u0301? Les spe\u0301cialistes vous re\u0301pondront bien su\u0302r que non. Si vos amis pensent que si, vous pouvez les e\u0301pater avec un calcul de coin de table.<\/p>\n<p><b>L\u2019explication est dans le mouvement<\/b><\/p>\n<p>Car la gravite\u0301 d\u2019un corps ce\u0301leste varie comme l\u2019inverse du carre\u0301 de la distance a\u0300 son centre. En premie\u0300re approximation, la gravite\u0301 de\u0301croi\u0302t comme deux fois le rapport entre l\u2019altitude et le rayon terrestre. Au niveau de l\u2019ISS, ceci donne une gravite\u0301 re\u0301duite de 12,5 % = 800\/6400 par rapport a\u0300 celle au sol. Pas de quoi expliquer les pirouettes. Alors pourquoi peut-on expe\u0301rimenter l\u2019impesanteur si pre\u0300s de la Terre? L\u2019explication est dans le mouvement.<\/p>\n<p>Le vol des fuse\u0301es des ultrariches leur procure une e\u0301phe\u0301me\u0300re sensation d\u2019impesanteur. La rotation de l\u2019ISS autour de la Terre compense la gravite\u0301 terrestre en permanence, par effet centrifuge comme sur un tourniquet. Les spe\u0301cialistes diront que l\u2019ISS est en chute libre sur son orbite. Jusqu\u2019a\u0300 ce qu\u2019elle soit de\u0301sorbite\u0301e et tombe pour de bon&#8230;<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace commence a\u0300 100 km au-dessus de nos te\u0302tes. A\u0300 peine l\u2019e\u0301paisseur d\u2019un zeste si l\u2019on compare la Terre a\u0300 une orange. La Station spatiale internationale (ISS) est quatre fois plus haut, mais encore mille [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":69065,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-69066","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre - Senegal<\/title>\n<meta name=\"description\" content=\"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...\" \/>\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\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre\" \/>\n<meta property=\"og:description\" content=\"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\" \/>\n<meta property=\"og:site_name\" content=\"Senegal\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-10T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-10T19:34:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre\",\"datePublished\":\"2025-06-10T12:00:00+00:00\",\"dateModified\":\"2025-06-10T19:34:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\"},\"wordCount\":318,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg\",\"keywords\":[\"Senegal\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\",\"name\":\"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre - Senegal\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg\",\"datePublished\":\"2025-06-10T12:00:00+00:00\",\"dateModified\":\"2025-06-10T19:34:21+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg\",\"width\":1200,\"height\":900,\"caption\":\"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/senegal\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#website\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/\",\"name\":\"Africa Press | Senegal | Homepage\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/senegal\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/author\/cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre - Senegal","description":"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre","og_locale":"fr_FR","og_type":"article","og_title":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre","og_description":"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...","og_url":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre","og_site_name":"Senegal","article_published_time":"2025-06-10T12:00:00+00:00","article_modified_time":"2025-06-10T19:34:21+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre","datePublished":"2025-06-10T12:00:00+00:00","dateModified":"2025-06-10T19:34:21+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre"},"wordCount":318,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg","keywords":["Senegal"],"articleSection":["Divers","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre","url":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre","name":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre - Senegal","isPartOf":{"@id":"https:\/\/www.africa-press.net\/senegal\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg","datePublished":"2025-06-10T12:00:00+00:00","dateModified":"2025-06-10T19:34:21+00:00","author":{"@id":"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"C\u2019est loin comment l\u2019espace? Vous connaissez la re\u0301ponse si vous suivez l\u2019actualite\u0301 du \u00ab tourisme spatial \u00bb: l\u2019espace c ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#primaryimage","url":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg","contentUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1749612740.548035.jpg","width":1200,"height":900,"caption":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/experimenter-limpesanteur-pres-de-la-terre#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/senegal\/"},{"@type":"ListItem","position":2,"name":"Exp\u00e9rimenter L\u2019Impesanteur pr\u00e8s de la Terre"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/senegal\/#website","url":"https:\/\/www.africa-press.net\/senegal\/","name":"Africa Press | Senegal | Homepage","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/senegal\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr","url":"https:\/\/www.africa-press.net\/senegal\/author\/cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts\/69066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/comments?post=69066"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts\/69066\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/media\/69065"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/media?parent=69066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/categories?post=69066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/tags?post=69066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}