{"id":9489,"date":"2021-04-20T14:59:52","date_gmt":"2021-04-20T12:59:52","guid":{"rendered":"https:\/\/www.culturalusa.com\/news\/?p=9489"},"modified":"2021-04-20T15:03:55","modified_gmt":"2021-04-20T13:03:55","slug":"la-science-dans-lespace-une-aventure-spatiale-arrivee-a-maturite","status":"publish","type":"post","link":"https:\/\/www.culturalusa.com\/news\/technologie\/la-science-dans-lespace-une-aventure-spatiale-arrivee-a-maturite\/","title":{"rendered":"La science dans l&rsquo;espace, une aventure spatiale arriv\u00e9e \u00e0 maturit\u00e9"},"content":{"rendered":"<p>Cela fait plus de 20 ans qu&rsquo;elle tourne autour de la Terre pour faire avancer la science: la <strong>Station spatiale internationale (ISS)<\/strong>, qui s&rsquo;appr\u00eate \u00e0 accueillir <strong>Thomas Pesquet<\/strong>, est devenue au fil du temps un laboratoire de pointe, o\u00f9 l&rsquo;apesanteur n&rsquo;a pas fini d&rsquo;aiguiser l&rsquo;app\u00e9tit des chercheurs.<\/p>\n<blockquote><p>Depuis le d\u00e9but de sa construction en 1998, plus de 3.000 exp\u00e9riences ont \u00e9t\u00e9 r\u00e9alis\u00e9es \u00e0 400 km d&rsquo;altitude. Les unes tourn\u00e9es vers la Terre, les autres vers l&rsquo;exploration spatiale, avec la Lune et Mars d\u00e9sormais en vue.<\/p><\/blockquote>\n<p>La Station a atteint son \u00e2ge d&rsquo;or, apr\u00e8s une longue phase de croissance. \u00ab\u00a0Elle fonctionne \u00e0 100% de ses capacit\u00e9s, l&rsquo;utilisation du laboratoire tel que pens\u00e9 initialement est optimale\u00a0\u00bb, rel\u00e8ve S\u00e9bastien Vincent-Bonnieu, qui coordonne les exp\u00e9riences scientifiques \u00e0 l&rsquo;agence spatiale europ\u00e9enne (ESA).<\/p>\n<p>L&rsquo;int\u00e9rieur de l&rsquo;ISS, grande comme un terrain de foot, s&rsquo;apparente \u00e0 une ruche o\u00f9 tous les espaces sont occup\u00e9s par les astronautes, dont la t\u00e2che principale consiste aujourd&rsquo;hui \u00e0 r\u00e9aliser des exp\u00e9riences, pilot\u00e9es par les chercheurs depuis la Terre. Et \u00e0 servir de \u00ab\u00a0cobayes\u00a0\u00bb.<\/p>\n<h3>Des \u00ab\u00a0mini-cerveaux\u00a0\u00bb<\/h3>\n<p>La deuxi\u00e8me mission de Thomas Pesquet, \u00ab\u00a0Alpha\u00a0\u00bb, s&rsquo;annonce charg\u00e9e, avec une centaine d&rsquo;exp\u00e9riences au programme.<\/p>\n<blockquote><p>Parmi elles, \u00ab\u00a0<span style=\"color: #800000;\">Cerebral Ageing<\/span>\u00ab\u00a0, pour <span style=\"color: #800000;\">\u00e9tudier le vieillissement sur des cellules nerveuses de cerveaux<\/span>. Ou encore \u00ab\u00a0T\u00e9l\u00e9maque\u00a0\u00bb, une pince acoustique de manipulation d&rsquo;objets sans contact, \u00ab\u00a0Eco Pack\u00a0\u00bb, une nouvelle g\u00e9n\u00e9ration d&#8217;emballages, un \u00e9levage de blob, organisme unicellulaire qui fascine les biologistes&#8230;<\/p><\/blockquote>\n<p>\u00ab\u00a0Certains demandent ce que Thomas Pesquet va faire de +mieux+ que lors de sa premi\u00e8re mission, Proxima. Mais rien en fait, c&rsquo;est le m\u00eame m\u00e9tier\u00a0\u00bb, estime S\u00e9bastien Barde, responsable du Cadmos, structure du CNES (l&rsquo;agence spatiale fran\u00e7aise) charg\u00e9e des activit\u00e9s en micro-pensanteur.<\/p>\n<p><strong>Les six laborantins de l&rsquo;ISS se relaient<\/strong>, certains commencent une manipulation, d&rsquo;autres la terminent. \u00ab\u00a0Les exp\u00e9riences sont pens\u00e9es sur le long terme, ind\u00e9pendamment des missions. La science y gagne \u00e9norm\u00e9ment\u00a0\u00bb, d\u00e9veloppe l&rsquo;ing\u00e9nieur du Cadmos.<\/p>\n<p><strong>L&rsquo;\u00e9tude de l&rsquo;apesanteur, ou microgravit\u00e9<\/strong>, est \u00ab\u00a0pass\u00e9e d&rsquo;une \u00e8re pionni\u00e8re \u00e0 quelque chose d&rsquo;industrialis\u00e9\u00a0\u00bb, avec des moyens de mesure de plus en plus pr\u00e9cis: \u00ab\u00a0Il y a vingt ans, il n&rsquo;y avait pas d&rsquo;\u00e9chographe \u00e0 bord\u00a0\u00bb.<\/p>\n<p>Claudie Haigner\u00e9, premi\u00e8re femme fran\u00e7aise \u00e0 voler dans l&rsquo;espace, se souvient d&rsquo;une l&rsquo;ISS \u00ab\u00a0peu \u00e9quip\u00e9e\u00a0\u00bb \u00e0 ses d\u00e9buts, et \u00ab\u00a0admire ce qu&rsquo;elle est devenue, avec des laboratoires exceptionnels\u00a0\u00bb.<\/p>\n<p>Les <strong>astronautes<\/strong> \u00ab\u00a0cobayes\u00a0\u00bb s\u00e9journent en outre plus longtemps: six mois, versus une quinzaine de jours pour les premiers vols habit\u00e9s; la mesure des effets de la microgravit\u00e9 sur leur organisme n&rsquo;en est que plus pertinente.<\/p>\n<h3>\u00ab\u00a0On apprend en permanence\u00a0\u00bb<\/h3>\n<p>L\u00e0-haut, la machine humaine, hyper adapt\u00e9e \u00e0 la gravit\u00e9, est secou\u00e9e comme dans un +shaker+, et la d\u00e9gradation observ\u00e9e sur les os, les art\u00e8res, est proche du vieillissement cellulaire. A la diff\u00e9rence qu&rsquo;au retour au sol, le ph\u00e9nom\u00e8ne est r\u00e9versible.<\/p>\n<p>\u00ab\u00a0C&rsquo;est \u00e7a qui est int\u00e9ressant: \u00e9tudier ce que le corps met en jeu pour revenir \u00e0 son \u00e9quilibre, avec d&rsquo;\u00e9ventuelles pistes pour des traitements\u00a0\u00bb, analyse S\u00e9bastien Barde.<\/p>\n<p>\u00ab\u00a0Autant au d\u00e9but de l&rsquo;\u00e8re spatiale, on avait besoin du m\u00e9dical pour aller dans l&rsquo;espace, autant aujourd&rsquo;hui, c&rsquo;est l&rsquo;espace qui apporte au m\u00e9dical car l&rsquo;apesanteur permet de mieux comprendre des maladies\u00a0\u00bb, a soulign\u00e9 le pr\u00e9sident sortant du CNES, Jean-Yves Le Gall, sur France Inter.<\/p>\n<p>Ost\u00e9oporose, traitement contre la salmonellose, syst\u00e8mes de purification de l&rsquo;eau&#8230; En 20 ans, \u00ab\u00a0des d\u00e9couvertes majeures y ont \u00e9t\u00e9 faites\u00a0\u00bb, selon l&rsquo;historien am\u00e9ricain Robert Pearlman, et d&rsquo;autres s&rsquo;annoncent \u00ab\u00a0prometteuses\u00a0\u00bb, comme l&rsquo;impression 3D d&rsquo;organes.<\/p>\n<p>Des voies se sont \u00e9lev\u00e9es contre le co\u00fbt de l&rsquo;ISS, jug\u00e9 disproportionn\u00e9 au regard des d\u00e9couvertes, au moment o\u00f9 la Nasa cherche \u00e0 se d\u00e9sengager pour se concentrer sur l&rsquo;exploration lointaine.<\/p>\n<p>En 2019, l&rsquo;ex-astronaute Patrick Baudry, qualifait la Station de \u00ab\u00a0bobard\u00a0\u00bb. \u00ab\u00a0Depuis la station sovi\u00e9tique Mir, on sait d\u00e9j\u00e0 tout ce qu&rsquo;il faut savoir sur les effets de la microgravit\u00e9 sur le corps,\u00a0\u00bb critiquait-il.<\/p>\n<p>\u00ab\u00a0Discuter du co\u00fbt est une chose, mais dire qu&rsquo;on a fait le tour est un peu idiot. C&rsquo;est comme se demander s&rsquo;il faut agrandir un t\u00e9lescope parce qu&rsquo;on aurait vu +assez+ d&rsquo;\u00e9toiles !\u00a0\u00bb, r\u00e9pond le responsable du Cadmos.<\/p>\n<p>Pour certains scientifiques, insiste-t-il, l&rsquo;ISS dont la fin est pr\u00e9vue en 2028, est \u00ab\u00a0l&rsquo;unique moyen d&rsquo;acc\u00e9der \u00e0 leurs th\u00e8mes de recherche\u00a0\u00bb, en m\u00e9decine mais aussi en sciences de la mati\u00e8re, pour lesquelles surmonter la gravit\u00e9 est essentiel.<\/p>\n<p>Il y aura ainsi toujours une communaut\u00e9 avide d&rsquo;\u00e9tudier les ph\u00e9nom\u00e8nes sans gravit\u00e9, pense le physicien S\u00e9bastien Vincent-Bonnieu, qui constate d&rsquo;ailleurs un int\u00e9r\u00eat \u00ab\u00a0croissant\u00a0\u00bb pour les exp\u00e9riences en orbite. Dans l&rsquo;ISS ou ailleurs, comme la future station orbitale lunaire. (AFP)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cela fait plus de 20 ans qu&rsquo;elle tourne autour de la Terre pour faire avancer la science: la Station spatiale internationale (ISS), qui s&rsquo;appr\u00eate \u00e0 accueillir Thomas Pesquet, est devenue au fil du temps un laboratoire de pointe, o\u00f9 l&rsquo;apesanteur n&rsquo;a pas fini d&rsquo;aiguiser l&rsquo;app\u00e9tit des chercheurs. Depuis le d\u00e9but de sa construction en 1998, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9490,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[1768,1767,1766,1435,1765,1764],"class_list":["post-9489","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","tag-astronautes","tag-etude-de-lapesanteur","tag-iss","tag-science","tag-station-spatiale-internationale","tag-thomas-pesquet"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Cela fait plus de 20 ans qu&#039;elle tourne autour de la Terre pour faire avancer la science: la Station spatiale internationale (ISS), qui s&#039;appr\u00eate \u00e0 accueillir Thomas Pesquet, est devenue au fil du temps un laboratoire de pointe, o\u00f9 l&#039;apesanteur n&#039;a pas fini d&#039;aiguiser l&#039;app\u00e9tit des chercheurs. 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