{"id":9798,"date":"2018-10-31T09:56:42","date_gmt":"2018-10-31T09:56:42","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9798"},"modified":"2018-11-11T18:17:31","modified_gmt":"2018-11-11T18:17:31","slug":"le-ballon-dun-jeune-quebecois-atteint-la-stratosphere","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/10\/31\/le-ballon-dun-jeune-quebecois-atteint-la-stratosphere\/","title":{"rendered":"Le ballon d&#8217;un jeune Qu\u00e9b\u00e9cois atteint la stratosph\u00e8re"},"content":{"rendered":"<p><strong>Tristan Leblanc, jeune Qu\u00e9b\u00e9cois de 17 ans, a construit et envoy\u00e9 une petite nacelle et son ballon dans la stratosph\u00e8re \u00e0 plus de 32 kilom\u00e8tres d&#8217;altitude.<\/strong><\/p>\n<p>L&#8217;espace fait toujours r\u00eaver ; il suffit pour s&#8217;en convaincre de voir l&#8217;engouement que suscitent des projets comme le lancement de la <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/falcon-heavy-mars-tesla-elon-musk-pourrait-revenir-terre-69431\/\" target=\"_blank\" rel=\"noopener\">Tesla d&#8217;Elon Musk<\/a> en f\u00e9vrier 2018 ou encore le <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/aeronautique-image-felix-baumgartner-homme-plus-rapide-monde-41879\/\" target=\"_blank\" rel=\"noopener\">saut de Felix Baumgartner<\/a>\u00a0depuis la stratosph\u00e8re en 2012. Sans parler du <a href=\"https:\/\/www.onthemoonagain.org\/homefr\" target=\"_blank\" rel=\"noopener\">cinquantenaire du premier Homme sur la Lune<\/a> que nous f\u00eaterons en 2019 et qui devrait faire na\u00eetre de nombreuses vocations.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/j0VBm5nTI9o\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>Outre de solides connaissances scientifiques, de tels exploits n\u00e9cessitent de gros investissements. Mais la passion et l&#8217;intelligence permettent parfois de belles r\u00e9alisations avec peu de moyens : exemple avec <a href=\"https:\/\/www.facebook.com\/tristanleblanc\" target=\"_blank\" rel=\"noopener\">Tristan Leblanc<\/a> qui vient de lancer son propre ballon stratosph\u00e9rique.<!--more--><\/p>\n<p>Ce jeune Qu\u00e9b\u00e9cois passionn\u00e9 par l&#8217;espace depuis longtemps a \u00e9t\u00e9 marqu\u00e9 par l&#8217;\u00e9clipse de Soleil qui s&#8217;est produite le 21 ao\u00fbt 2017 (un superbe ph\u00e9nom\u00e8ne film\u00e9 par l&#8217;astrophotographe fran\u00e7ais <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/08\/23\/video-famille-francaise-soleil-noir\/\" target=\"_blank\" rel=\"noopener\">Olivier Sauzereau<\/a>). Il s&#8217;est alors demand\u00e9 \u00e0 quoi ressemblait le passage de l&#8217;ombre lunaire sur notre plan\u00e8te au cours de l&#8217;\u00e9clipse si on l&#8217;observait depuis l&#8217;espace. Tristan Leblanc a donc d\u00e9cid\u00e9 de r\u00e9aliser une nacelle accroch\u00e9e \u00e0 un ballon qui pourrait s&#8217;\u00e9lever jusqu&#8217;\u00e0 la stratosph\u00e8re.<\/p>\n<figure id=\"attachment_9805\" aria-describedby=\"caption-attachment-9805\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist5.jpg\" rel=\"lightbox[9798]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9805\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist5-450x267.jpg\" alt=\"\" width=\"450\" height=\"267\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist5-450x267.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist5.jpg 590w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9805\" class=\"wp-caption-text\">C&#8217;est durant l&#8217;\u00e9clipse de Soleil du 21 ao\u00fbt 2017 que Tristan Leblanc (\u00e0 gauche) a imagin\u00e9 son projet de ballon stratosph\u00e9rique pour voir la Terre d&#8217;en haut.<\/figcaption><\/figure>\n<p>Les ballons stratosph\u00e9riques sont des ballons dilatables remplis d\u2019h\u00e9lium (beaucoup moins dangereux que l\u2019hydrog\u00e8ne utilis\u00e9 autrefois) qui peuvent s\u2019\u00e9lever jusqu\u2019\u00e0 50 km d\u2019altitude. Ils servent \u00e0 analyser la composition de l\u2019atmosph\u00e8re et \u00e0 r\u00e9aliser des observations astronomiques comme l\u2019\u00e9tude des\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/19\/en-video-cta-un-futur-reseau-de-telescopes-gamma\/\" target=\"_blank\" rel=\"noopener\">rayons cosmiques<\/a>. C\u2019est dans une nacelle enlev\u00e9e par un ballon de ce type que l\u2019a\u00e9ronaute suisse Auguste Piccard (le grand-p\u00e8re de\u00a0<a href=\"http:\/\/bertrandpiccard.com\/\" target=\"_blank\" rel=\"noopener\">Bertrand Piccard<\/a>) s\u2019\u00e9leva \u00e0 plus de 15 km d\u2019altitude en 1931.<\/p>\n<figure id=\"attachment_9799\" aria-describedby=\"caption-attachment-9799\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1.jpg\" rel=\"lightbox[9798]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9799\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1-768x477.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1-1024x636.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist1.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9799\" class=\"wp-caption-text\">R\u00e9alis\u00e9e en styromousse, la nacelle IBICTTS suspendue \u00e0 son ballon contient deux cam\u00e9ras destin\u00e9es \u00e0 filmer le vol et la petite pomme de terre Billy qui va faire le voyage.<\/figcaption><\/figure>\n<p>Seconde couche de l&#8217;atmosph\u00e8re terrestre coinc\u00e9e entre la troposph\u00e8re en dessous et la m\u00e9sosph\u00e8re plus haut, la stratosph\u00e8re s&#8217;\u00e9tire en gros de 10 \u00e0 50 kilom\u00e8tres au-dessus du sol. C&#8217;est dans la stratosph\u00e8re que se situe la <a href=\"https:\/\/www.futura-sciences.com\/planete\/videos\/couche-ozone-surveillee-satellites-5144\/\" target=\"_blank\" rel=\"noopener\">couche d&#8217;ozone<\/a> dont on conna\u00eet l&#8217;importance (ce gaz absorbe en partie le rayonnement ultraviolet du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/06\/le-soleil-se-couche-sur-le-desert-datacama\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a> qui est nocif \u00e0 forte dose et r\u00e9gule les temp\u00e9ratures).<\/p>\n<figure id=\"attachment_9800\" aria-describedby=\"caption-attachment-9800\" style=\"width: 338px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist2.jpg\" rel=\"lightbox[9798]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9800\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist2-338x450.jpg\" alt=\"\" width=\"338\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist2-338x450.jpg 338w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist2.jpg 720w\" sizes=\"auto, (max-width: 338px) 100vw, 338px\" \/><\/a><figcaption id=\"caption-attachment-9800\" class=\"wp-caption-text\">Gonfl\u00e9 \u00e0 l&#8217;h\u00e9lium, le ballon est pr\u00eat \u00e0 emporter la nacelle IBICTTS dans la stratosph\u00e8re. Un parachute freinera le retour sur Terre.<\/figcaption><\/figure>\n<p>Pendant pr\u00e8s d&#8217;un an Tristan a travaill\u00e9 (tout seul) sur ce projet : se documentant sur Internet, il a fait une multitude de tests pour trouver les produits les mieux adapt\u00e9s aux conditions du vol (l&#8217;ennemi num\u00e9ro un \u00e9tant le froid rencontr\u00e9 dans la stratosph\u00e8re). Il a finalement con\u00e7u une petite nacelle en styromousse surnomm\u00e9e IBICTTS (pour\u00a0<em>I Believe I Can Touch The Sky<\/em>) qui contenait deux cam\u00e9ras et un syst\u00e8me de localisation, l&#8217;ensemble \u00e9tant aliment\u00e9 par deux batteries.<\/p>\n<figure id=\"attachment_9802\" aria-describedby=\"caption-attachment-9802\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4.jpg\" rel=\"lightbox[9798]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9802\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4-450x279.jpg\" alt=\"\" width=\"450\" height=\"279\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4-450x279.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4-768x477.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4-1024x636.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist4.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9802\" class=\"wp-caption-text\">Vue imprenable pour la petite pomme de terre Billy \u00e0 plus de 32 kilom\u00e8tres d&#8217;altitude.<\/figcaption><\/figure>\n<p>Accroch\u00e9e \u00e0 un ballon d&#8217;environ 1.8 m\u00e8tre de diam\u00e8tre, la nacelle a \u00e9t\u00e9 lanc\u00e9e il y a quelques jours avec succ\u00e8s : la mission (surnomm\u00e9e Strato 1 par Tristan) a emmen\u00e9 une petite pomme de terre (Billy) \u00e0 un peu plus de 32 kilom\u00e8tres d&#8217;altitude au cours d&#8217;un voyage d&#8217;environ 3 heures. Une fois dans la stratosph\u00e8re le ballon (qui avait tripl\u00e9 de volume) a explos\u00e9 et la nacelle est revenue tranquillement sur Terre au bout d&#8217;un parachute, se posant dans une exploitation agricole laiti\u00e8re situ\u00e9e \u00e0 232 kilom\u00e8tres de son point de d\u00e9part. Gageons qu&#8217;apr\u00e8s ce succ\u00e8s, Tristan n&#8217;en restera pas l\u00e0 ; il se murmure qu&#8217;une mission Strato 2 est en projet&#8230;<\/p>\n<figure id=\"attachment_9801\" aria-describedby=\"caption-attachment-9801\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3.jpg\" rel=\"lightbox[9798]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9801\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3-450x278.jpg\" alt=\"\" width=\"450\" height=\"278\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3-450x278.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3-768x474.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3-1024x632.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/trist3.jpg 1449w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9801\" class=\"wp-caption-text\">Succ\u00e8s total pour la mission Strato 1 : apr\u00e8s s&#8217;\u00eatre \u00e9lev\u00e9e \u00e0 plus de 32 kilom\u00e8tres dans la stratosph\u00e8re, la nacelle IBICTTS a atterri sans encombre dans une exploitation agricole.<\/figcaption><\/figure>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Tristan Leblanc, jeune Qu\u00e9b\u00e9cois de 17 ans, a construit et envoy\u00e9 une petite nacelle et son ballon dans la stratosph\u00e8re \u00e0 plus de 32 kilom\u00e8tres d&#8217;altitude. L&#8217;espace fait toujours r\u00eaver ; il suffit pour s&#8217;en convaincre de voir l&#8217;engouement que suscitent des projets comme le lancement de la Tesla d&#8217;Elon Musk en f\u00e9vrier 2018 ou &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/10\/31\/le-ballon-dun-jeune-quebecois-atteint-la-stratosphere\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Le ballon d&#8217;un jeune Qu\u00e9b\u00e9cois atteint la stratosph\u00e8re<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":9802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[2308,2592,2593,2589,2590,2591,1013],"class_list":["post-9798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-ballon-stratospherique","tag-couche-dozone","tag-ibictts","tag-strato-1","tag-stratosphere","tag-tristan-leblanc","tag-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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