{"id":18031,"date":"2020-02-27T10:17:17","date_gmt":"2020-02-27T09:17:17","guid":{"rendered":"https:\/\/www.stelvision.com\/astro\/?p=18031"},"modified":"2021-07-29T15:11:57","modified_gmt":"2021-07-29T13:11:57","slug":"decollage-reussi-pour-solar-orbiter","status":"publish","type":"post","link":"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/","title":{"rendered":"D\u00e9collage r\u00e9ussi pour Solar Orbiter"},"content":{"rendered":"\n<p class=\"chapo\">La sonde Solar Orbiter de l&rsquo;Esa et de la Nasa a \u00e9t\u00e9 lanc\u00e9e avec succ\u00e8s le 10&nbsp;f\u00e9vrier&nbsp;2020 \u00e0 destination du Soleil. Le satellite a pour mission d&rsquo;\u00e9tudier l&rsquo;atmosph\u00e8re et le vent solaires, et d&rsquo;effectuer les toutes premi\u00e8res observations haute r\u00e9solution des r\u00e9gions polaires de notre \u00e9toile. Analyse de la mission et des premiers r\u00e9sultats. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"531\" height=\"299\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA.jpg\" alt=\"Vue d'artiste du satellite Solar Orbiter, devant le Soleil en fond en rouge orange qui prend toute l'image.\" class=\"wp-image-18061\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA.jpg 531w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA-300x169.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA-368x207.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA-270x152.jpg 270w\" sizes=\"(max-width: 531px) 100vw, 531px\" \/><figcaption><strong>Vue d&rsquo;artiste de Solar Orbiter devant le Soleil. <\/strong><small>Cr\u00e9dits&nbsp;: ESA\/ATG medialab (sonde) NASA\/SDO\/P.Testa\/CfA (Soleil)<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Lancement depuis Cap Canaveral<\/h2>\n\n\n\n<p>Con\u00e7ue et d\u00e9velopp\u00e9e par l&rsquo;agence spatiale europ\u00e9enne (Esa) avec une forte participation de la Nasa, la sonde Solar&nbsp;Orbiter s&rsquo;est envol\u00e9e sans encombres vers le Soleil le 10&nbsp;f\u00e9vrier&nbsp;2020.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"594\" height=\"397\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja.jpg\" alt=\"Sur fond de ciel bleu fonc\u00e9, avec en bas de l'image le Kennedy Space Center de Cape Canaveral (Floride), on voit un arc de cercle dor\u00e9 dirig\u00e9 vers le Soleil qui repr\u00e9sente la trajectoire de la fus\u00e9e qui a emport\u00e9 Solar Orbiter dans l'espace le 10 f\u00e9vrier\" class=\"wp-image-18035\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja.jpg 594w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja-300x201.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja-570x381.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja-368x246.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_liftoff_Cape_Canaveral_credit_Esa_S_Corvaja-270x180.jpg 270w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><figcaption><strong>Lancement de Solar Orbiter depuis la Floride.<\/strong><small> Cr\u00e9dit\u00a0: Esa\/S.\u00a0Corvaja<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>Lanc\u00e9 par une fus\u00e9e Atlas&nbsp;V depuis le Kennedy Space Center de Cap Canaveral (Floride), le satellite d&rsquo;observation d\u00e9di\u00e9 \u00e0 l&rsquo;<a href=\"https:\/\/www.stelvision.com\/astro\/le-soleil-notre-bonne-etoile\/\">\u00e9tude du Soleil<\/a> a atteint sa premi\u00e8re orbite op\u00e9rationnelle &#8211;&nbsp;une ellipse autour de notre \u00e9toile&nbsp;&#8211; et a effectu\u00e9 ses premi\u00e8res mesures en 2020. La mission devrait durer au moins jusqu&rsquo;en 2026.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Des conditions infernales<\/h2>\n\n\n\n<p>Au maximum, Solar&nbsp;Orbiter devrait s&rsquo;approcher plus pr\u00e8s de notre \u00e9toile que l&rsquo;orbite de Mercure, \u00e0 42&nbsp;millions de kilom\u00e8tres de la surface solaire. Certes, cela tient moins du record que la sonde am\u00e9ricaine Parker Solar Probe, qui devrait en 2024 se trouver plus proche que jamais du Soleil \u00e0 environ six millions de kilom\u00e8tres. Mais Solar Orbiter devrait tout de m\u00eame \u00eatre soumise \u00e0 des temp\u00e9ratures atteignant les 520&nbsp;\u00b0C, soit 13&nbsp;fois plus que la chaleur endur\u00e9e par les satellites en orbite autour de la Terre&nbsp;!<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"414\" height=\"414\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO.jpg\" alt=\"Image sur fond noir du Soleil. On le voit en entier, on distingue une \u00e9ruption solaire en bas \u00e0 droite et sur toute la surface rouge orang\u00e9 du Soleil, des traces d'activit\u00e9.\" class=\"wp-image-18114\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO.jpg 414w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-150x150.jpg 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-300x300.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-368x368.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-270x270.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-62x62.jpg 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Sun_warm_credit_Nasa_SDO-100x100.jpg 100w\" sizes=\"(max-width: 414px) 100vw, 414px\" \/><figcaption><strong>Photographie du Soleil en 2014.<\/strong><small> Cr\u00e9dit\u00a0: Nasa\/SDO<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>Or la sonde emporte dix instruments scientifiques. Pour pouvoir fonctionner dans ces conditions extr\u00eames, ces \u00e9quipements doivent \u00eatre prot\u00e9g\u00e9s. Ils sont donc plac\u00e9s derri\u00e8re un bouclier thermique tr\u00e8s sophistiqu\u00e9. <em>\u00ab\u00a0Notre \u00e9quipe devra assurer l&rsquo;orientation pr\u00e9cise et continue du bouclier dans l&rsquo;espace pour \u00e9viter de potentiels d\u00e9g\u00e2ts dus aux \u00e9missions solaires\u00a0\u00bb<\/em>, analyse Sylvain Lodiot, responsable des op\u00e9rations Solar Orbiter \u00e0 l&rsquo;Esa.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"369\" height=\"554\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_bouclier_credit_Esa_S_Corvaja-1.jpg\" alt=\"Photo du bouclier thermique de Solar Orbiter en salle blanche. On voit la face qui sera expos\u00e9e au Soleil, pourvue d'un rev\u00eatement noir.\" class=\"wp-image-18159\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_bouclier_credit_Esa_S_Corvaja-1.jpg 369w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_bouclier_credit_Esa_S_Corvaja-1-200x300.jpg 200w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_bouclier_credit_Esa_S_Corvaja-1-368x552.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_bouclier_credit_Esa_S_Corvaja-1-270x405.jpg 270w\" sizes=\"(max-width: 369px) 100vw, 369px\" \/><figcaption><strong>Solar Orbiter pourvue de son bouclier thermique de couleur noir.<\/strong><small> Cr\u00e9dit\u00a0: Esa\/S.\u00a0Corvaja<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>Le bouclier thermique de 3,1 par 2,4&nbsp;m\u00e8tres poss\u00e8de une structure en \u00ab\u00a0sandwich\u00a0\u00bb. C\u00f4t\u00e9 satellite, on trouve une base en aluminium, s\u00e9par\u00e9e par 25&nbsp;centim\u00e8tres de vide (couche n\u00e9cessaire pour \u00e9vacuer la chaleur vers l&rsquo;espace) d&rsquo;une partie sup\u00e9rieure en titane c\u00f4t\u00e9 Soleil. Les tr\u00e8s fines feuilles de titane, un mat\u00e9riau isolant, ont \u00e9t\u00e9 con\u00e7ues pour renvoyer le plus de chaleur possible. <\/p>\n\n\n\n<p>De plus, la face expos\u00e9e au Soleil est recouverte de phosphate de calcium. D&rsquo;apr\u00e8s l&rsquo;agence spatiale am\u00e9ricaine, cette mati\u00e8re noire obtenue \u00e0 partir de poudre d&rsquo;os carbonis\u00e9s entre aussi dans la composition de pigments ayant notamment servi \u00e0 la r\u00e9alisation de peintures rupestres durant la Pr\u00e9histoire.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Images in\u00e9dites des p\u00f4les solaires<\/h2>\n\n\n\n<p>Solar Orbiter va combiner ses dix instruments, dont neuf ont \u00e9t\u00e9 con\u00e7us et fabriqu\u00e9s en Europe, pour observer les turbulences \u00e0 la surface du Soleil, la haute atmosph\u00e8re de notre \u00e9toile et les variations dans le vent solaire. D&rsquo;une part, quatre \u00e9quipements <em>in situ<\/em> vont mesurer les particules \u00e9nerg\u00e9tiques et le champ magn\u00e9tique \u00e9mis par le Soleil au niveau de la sonde.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"600\" height=\"338\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_boom_and_antenna_deployments_credit_Esa-1.gif\" alt=\"Animation o\u00f9 l'on voit en noir et blanc le d\u00e9ploiement des antennes de Solar Orbiter.\" class=\"wp-image-18166\"\/><figcaption><strong>D\u00e9ploiement du bras et des trois antennes de Solar Orbiter.<\/strong><small> Cr\u00e9dit\u00a0: Esa<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>Transport\u00e9s jusqu&rsquo;\u00e0 la Terre dans le vent solaire, ces \u00e9l\u00e9ments sont \u00e0 l&rsquo;origine des <a href=\"https:\/\/www.stelvision.com\/astro\/quest-ce-que-la-meteo-spatiale\/\">aurores polaires et de \u00ab\u00a0temp\u00eates solaires\u00a0\u00bb<\/a>, capables de perturber les r\u00e9seaux \u00e9lectriques et de t\u00e9l\u00e9communications. Les temp\u00eates peuvent avoir des cons\u00e9quences sur le trafic a\u00e9rien ou les \u00e9changes avec la Station spatiale internationale par exemple.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"470\" height=\"367\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/solar_storm_Nasa.jpg\" alt=\"Vue d'artiste qui montre le Soleil \u00e0 gauche de l'image, duquel s'\u00e9chappe une \u00e9mission de particules et champ magn\u00e9tique de couleur rouge orange, une temp\u00eate solaire. On voit qu'elle se dirige vers la droite de l'image o\u00f9 se trouve la Terre, entour\u00e9e de sa magn\u00e9tosph\u00e8re protectrice.\" class=\"wp-image-18133\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/solar_storm_Nasa.jpg 470w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/solar_storm_Nasa-300x234.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/solar_storm_Nasa-368x287.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/solar_storm_Nasa-270x211.jpg 270w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><figcaption><strong>Vue d&rsquo;artiste de l&rsquo;impact d&rsquo;une temp\u00eate solaire sur la <a href=\"https:\/\/www.stelvision.com\/astro\/jupiter-les-dernieres-decouvertes\/\">magn\u00e9tosph\u00e8re<\/a> terrestre.<\/strong><small> Cr\u00e9dit\u00a0: Nasa<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>D&rsquo;autre part, les six autres instruments travaillant \u00e0 distance fourniront des images haute r\u00e9solution de la surface et de l&rsquo;atmosph\u00e8re solaires &#8211;&nbsp;couronne qui atteint le million de degr\u00e9s contre 5&nbsp;500&nbsp;\u00b0C pour la surface. Un des principaux objectifs de la mission est aussi de r\u00e9aliser les premi\u00e8res observations de l&rsquo;histoire des r\u00e9gions polaires de notre \u00e9toile. Bien qu&rsquo;invisibles depuis la Terre ou aux autres satellites d&rsquo;exploration, les p\u00f4les solaires seraient, d&rsquo;apr\u00e8s la communaut\u00e9 scientifique, une des clefs pour comprendre l&rsquo;activit\u00e9 du Soleil.<\/p>\n\n\n\n<p><em>\u00ab\u00a0Toutes ces donn\u00e9es vont nous fournir une vision in\u00e9dite de la mani\u00e8re dont notre \u00e9toile fonctionne, notamment son cycle de 11&nbsp;ans, et de comment le Soleil cr\u00e9e et contr\u00f4le la <a href=\"https:\/\/www.stelvision.com\/astro\/le-soleil-notre-bonne-etoile\/\">bulle magn\u00e9tique &#8211;&nbsp;h\u00e9liosph\u00e8re<\/a>&nbsp;&#8211; o\u00f9 se trouve la Terre\u00a0\u00bb<\/em>, explique Daniel M\u00fcller, responsable scientifique de la mission Solar Orbiter \u00e0 l&rsquo;Esa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Compl\u00e9mentarit\u00e9 avec la mission Parker Solar Probe<\/h2>\n\n\n\n<p>La sonde Solar Orbiter a \u00e9t\u00e9 con\u00e7ue pour travailler de concert avec la mission Parker Solar Probe lanc\u00e9e en ao\u00fbt&nbsp;2018. Cette derni\u00e8re \u00e9tudie le vent solaire naissant puisqu\u2019elle s\u2019approche plus pr\u00e8s du Soleil qu\u2019aucune autre sonde auparavant. Fin janvier, elle a battu un record en orbitant \u00e0 seulement 18,6&nbsp;millions de kilom\u00e8tres de la surface de notre \u00e9toile, affrontant des temp\u00e9ratures de plus de 600&nbsp;\u00b0C&nbsp;!<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"1042\" height=\"320\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Parker_Solar_Probe_credit_Nasa.gif\" alt=\"Animation o\u00f9 l'on voit le Soleil en fond et la sonde Parker Solar Probe passer devant, de gauche \u00e0 droite de l'image. \" class=\"wp-image-18154\"\/><figcaption><strong>Passage du satellite Parker Solar Probe devant le Soleil.<\/strong><small> Cr\u00e9dit\u00a0: Nasa<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<p>Mais Parker&nbsp;Solar&nbsp;Probe ne poss\u00e8de pas de cam\u00e9ras. D&rsquo;o\u00f9 la compl\u00e9mentarit\u00e9 avec Solar&nbsp;Orbiter qui se trouve \u00e0 une distance id\u00e9ale du Soleil pour \u00e0 la fois effectuer des mesures <em>in situ<\/em> et recueillir des images. Solar&nbsp;Orbiter pourra ainsi apporter des \u00e9l\u00e9ments de contexte n\u00e9cessaires \u00e0 la compr\u00e9hension des donn\u00e9es recueillies par Parker&nbsp;Solar&nbsp;Probe.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les premi\u00e8res mesures du magn\u00e9tom\u00e8tre<\/h2>\n\n\n\n<p>Le 13&nbsp;f\u00e9vrier&nbsp;2020, les \u00e9quipes de l&rsquo;Esa ont re\u00e7u les premi\u00e8res donn\u00e9es du magn\u00e9tom\u00e8tre. Cet instrument est en charge des mesures de champ magn\u00e9tique, champ aux valeurs des milliers de fois inf\u00e9rieures \u00e0 celles que l&rsquo;on peut trouver sur Terre.<\/p>\n\n\n\n<p><em>\u00ab\u00a0M\u00eame les courants dans les fils \u00e9lectriques du satellite cr\u00e9ent des champs magn\u00e9tiques bien plus intenses que ceux que l&rsquo;on cherche \u00e0 mesurer\u00a0\u00bb<\/em>,<em> <\/em>partage Tim Horbury, responsable scientifique du magn\u00e9tom\u00e8tre.<em> \u00ab\u00a0C&rsquo;est pourquoi nos capteurs sont situ\u00e9s sur un bras &#8211;&nbsp;en dehors de l&rsquo;habitacle principal&nbsp;&#8211; pour les \u00e9loigner de l&rsquo;activit\u00e9 \u00e9lectrique de l&rsquo;int\u00e9rieur du satellite\u00a0\u00bb.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video height=\"432\" style=\"aspect-ratio: 768 \/ 432;\" width=\"768\" controls src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_magnetometer_measurements_credit_Esa.mp4\"><\/video><figcaption><strong>Mesures du magn\u00e9tique \u00e0 l&rsquo;ouverture du bras.<\/strong><small> Cr\u00e9dit\u00a0: Esa<\/small><\/figcaption><\/figure>\n\n\n\n<p>Les capteurs qui ont recueilli des donn\u00e9es avant, pendant et apr\u00e8s le d\u00e9ploiement du bras montrent une d\u00e9croissance du champ magn\u00e9tique. Ceci est normal, puisque le magn\u00e9tom\u00e8tre s&rsquo;est physiquement \u00e9loign\u00e9 de l&rsquo;activit\u00e9 \u00e9lectrique du c\u0153ur de la sonde. \u00ab\u00a0<em>C&rsquo;est une confirmation que le bras s&rsquo;est bien d\u00e9ploy\u00e9 et que les instruments nous enverront bien, dans le futur, des mesures scientifiques correctes<\/em>\u00ab\u00a0, conclut Tim Horbury.<\/p>\n\n\n\n<p>Mesurer tout au long de l&rsquo;ouverture du bras a permis aux scientifiques d&rsquo;identifier et de caract\u00e9riser les signaux qui ne sont pas directement li\u00e9s au vent solaire, comme les perturbations en provenance de la plateforme du satellite ou des autres instruments. Finalement, ces premiers jours de vie en orbite sans aucun incident ont \u00e9t\u00e9 de bon augure.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"532\" height=\"376\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_artist_impression_credit_ESA_ATG_medialab.jpg\" alt=\"Vue d'artiste de la sonde Solar Orbiter avec le Soleil en fond \u00e0 droite en couleur jaune brillant, et le satellite au premier plan \u00e0 gauche avec ses antennes et panneaux solaires d\u00e9ploy\u00e9s. \" class=\"wp-image-18150\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_artist_impression_credit_ESA_ATG_medialab.jpg 532w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_artist_impression_credit_ESA_ATG_medialab-300x212.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_artist_impression_credit_ESA_ATG_medialab-368x260.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_artist_impression_credit_ESA_ATG_medialab-270x191.jpg 270w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/><figcaption><strong>Vue d&rsquo;artiste de Solar Orbiter.<\/strong><small> Cr\u00e9dit\u00a0: ESA\/ATG medialab<\/small><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Premiers r\u00e9sultats <\/h2>\n\n\n\n<p>Les premi\u00e8res donn\u00e9es recueillies par Solar Orbiter ont permis de d\u00e9terminer la r\u00e9gion source du vent solaire qui frappe la sonde, et d&rsquo;identifier cette \u00ab\u00a0empreinte\u00a0\u00bb dans les images de t\u00e9l\u00e9d\u00e9tection. <\/p>\n\n\n\n<p>De plus, de nouvelles informations sur de minuscules \u00e9ruptions \u00e0 la surface sur Soleil appel\u00e9es \u00ab\u00a0feux de camp\u00a0\u00bb ont \u00e9t\u00e9 obtenues. L&rsquo;existence de ces \u00e9ruptions \u00e9tait pressentie depuis longtemps, mais il n&rsquo;y avait jusqu&rsquo;\u00e0 pr\u00e9sent aucun moyen de d\u00e9tecter des \u00e9v\u00e9nements aussi petits. Une d\u00e9couverte fondamentale, puisque ces mini \u00e9ruptions seraient responsables de la mont\u00e9e en temp\u00e9rature de la couronne solaire. <\/p>\n\n\n\n<p>En 2022, Solar Orbiter devrait se rapprocher \u00e0 moins de 48&nbsp;millions de kilom\u00e8tres de la surface du Soleil, soit plus de 20&nbsp;millions de kilom\u00e8tres plus pr\u00e8s qu&rsquo;en 2021.<\/p>\n\n\n\n<p><em>Article mis \u00e0 jour en juin 2021.<\/em><\/p>\n\n\n\t\t\t\t\t\t<div style=\"margin-bottom: 18px;\">\t\t\t\t<a rel=\"nofollow\" href=\"https:\/\/www.stelvision.com\/astro\/boutique\/le-ciel-au-telescope\/?ref=bottom\">\r\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2025\/10\/Ciel-au-telescope-1200x900-1.webp\" alt=\"visuel publicitaire livre le Ciel au t\u00e9lescope\" class=\"img-responsive\">\r\n\t\t\t\t<\/a>\r\n\t\t\t\t<p style=\"text-align: center; margin-bottom: 0em; margin-top: 0.25em;\"><strong><a rel=\"nofollow\" href=\"https:\/\/www.stelvision.com\/astro\/boutique\/le-ciel-au-telescope\/?ref=bottom\">Le Ciel au t\u00e9lescope, le guide indispensable pour r\u00e9ussir vos observations<\/a><\/strong><\/p>\r\n\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La sonde Solar Orbiter de l&rsquo;Esa et de la Nasa a \u00e9t\u00e9 lanc\u00e9e avec succ\u00e8s le 10 f\u00e9vrier 2020 \u00e0 destination du Soleil. Le satellite a pour mission d&rsquo;\u00e9tudier l&rsquo;atmosph\u00e8re et le vent solaires, et d&rsquo;effectuer les toutes premi\u00e8res observations haute r\u00e9solution des r\u00e9gions polaires de notre \u00e9toile. <\/p>\n","protected":false},"author":4,"featured_media":18061,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-18031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-espace"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>D\u00e9collage r\u00e9ussi pour Solar Orbiter<\/title>\n<meta name=\"description\" content=\"La sonde Solar Orbiter lanc\u00e9e le 10 f\u00e9vrier 2020 a pour mission d&#039;observer les p\u00f4les de notre \u00e9toile, pour la toute premi\u00e8re fois de l&#039;histoire !\" \/>\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.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9collage r\u00e9ussi pour Solar Orbiter\" \/>\n<meta property=\"og:description\" content=\"D\u00e9couvrez les missions de la sonde Solar Orbiter, lanc\u00e9e le 10 f\u00e9vrier 2020 !\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/\" \/>\n<meta property=\"og:site_name\" content=\"Stelvision\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/people\/Stelvision\/100063368192331\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-02-27T09:17:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-29T13:11:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"531\" \/>\n\t<meta property=\"og:image:height\" content=\"299\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Fleur Olagnier\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"D\u00e9collage r\u00e9ussi pour Solar Orbiter\" \/>\n<meta name=\"twitter:description\" content=\"D\u00e9couvrez les missions de la sonde Solar Orbiter, lanc\u00e9e le 10 f\u00e9vrier 2020 !\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fleur Olagnier\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/\"},\"author\":{\"name\":\"Fleur Olagnier\",\"@id\":\"https:\/\/www.stelvision.com\/astro\/#\/schema\/person\/2bd39a1758d0f80250c83297259fc36b\"},\"headline\":\"D\u00e9collage r\u00e9ussi pour Solar Orbiter\",\"datePublished\":\"2020-02-27T09:17:17+00:00\",\"dateModified\":\"2021-07-29T13:11:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/\"},\"wordCount\":1468,\"publisher\":{\"@id\":\"https:\/\/www.stelvision.com\/astro\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.stelvision.com\/astro\/decollage-reussi-pour-solar-orbiter\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2020\/02\/Solar_Orbiter_vue_artiste_credit_Spacecraft_ESA_ATG_medialab_Sun_NASA_SDO_P_Testa_CfA.jpg\",\"articleSection\":[\"Science &amp; 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