{"id":15014,"date":"2022-03-28T16:31:20","date_gmt":"2022-03-28T16:31:20","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=15014"},"modified":"2023-05-06T08:46:16","modified_gmt":"2023-05-06T08:46:16","slug":"comment-observer-lactivite-solaire-en-toute-securite","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/03\/28\/comment-observer-lactivite-solaire-en-toute-securite\/","title":{"rendered":"Comment observer l&#8217;activit\u00e9 solaire en toute s\u00e9curit\u00e9"},"content":{"rendered":"<p><strong>Vous avez envie de suivre l&#8217;\u00e9volution de l&#8217;activit\u00e9 solaire ? Voici quelques conseils pour observer les taches du Soleil en toute s\u00e9curit\u00e9.\u00a0<\/strong><\/p>\n<h5>De l&#8217;acn\u00e9 sur le Soleil :<\/h5>\n<p>L\u2019activit\u00e9 solaire se mesure en d\u00e9nombrant les taches que l&#8217;on observe sur notre \u00e9toile. Une tache est une zone sombre car moins chaude que le gaz qui l&#8217;entoure. Son apparition trahit une intense activit\u00e9 magn\u00e9tique. <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/06\/galilee-le-savant-qui-a-ouvert-nos-yeux-sur-lunivers\/\" target=\"_blank\" rel=\"noopener noreferrer\">Galil\u00e9e<\/a> fut le premier \u00e0 observer les taches sur le Soleil en 1612 avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/05\/bien-choisir-sa-premiere-lunette-astronomique\/\" target=\"_blank\" rel=\"noopener noreferrer\">lunette astronomique<\/a>.<\/p>\n<figure id=\"attachment_15717\" aria-describedby=\"caption-attachment-15717\" style=\"width: 311px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/03\/galilee.jpg\" rel=\"lightbox[15014]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-15717 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/03\/galilee-311x450.jpg\" alt=\"\" width=\"311\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/03\/galilee-311x450.jpg 311w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/03\/galilee.jpg 692w\" sizes=\"auto, (max-width: 311px) 100vw, 311px\" \/><\/a><figcaption id=\"caption-attachment-15717\" class=\"wp-caption-text\">Galil\u00e9e. Dessin de Christine Sasiad<\/figcaption><\/figure>\n<p>La p\u00e9riodicit\u00e9 de l\u2019apparition de ces zones sombres fut \u00e9voqu\u00e9e par Heinrich Schwabe en 1848. Puis l\u2019astronome Rudolph Wolf d\u00e9termina la dur\u00e9e moyenne d\u2019un cycle solaire, environ 11 ans. Le prochain cycle, commenc\u00e9 fin 2019, devrait atteindre son maximum fin 2024, comme nous l&#8217;explique <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/soleil-maximum-activite-solaire-arrivera-plus-tot-prevu-quest-ce-ca-change-105023\/\" target=\"_blank\" rel=\"noopener\">Futura<\/a>. Nous allons donc observer de plus en plus de taches dans les mois \u00e0 venir.<\/p>\n<figure id=\"attachment_15015\" aria-describedby=\"caption-attachment-15015\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1.jpg\" rel=\"lightbox[15014]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15015\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15015\" class=\"wp-caption-text\">L&#8217;observation du Soleil et de ses taches permet de suivre l&#8217;\u00e9volution de l&#8217;activit\u00e9 solaire. Elle n\u00e9cessite imp\u00e9rativement l&#8217;emploi d&#8217;un filtre adapt\u00e9. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Ces taches sont num\u00e9rot\u00e9es dans l\u2019ordre d\u2019apparition par la <a href=\"http:\/\/www.noaa.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\">NOAA<\/a>,\u00a0le num\u00e9ro \u00e9tant pr\u00e9c\u00e9d\u00e9 par les lettres AR qui signifient\u00a0<em>Active Region<\/em>. Le site <a href=\"https:\/\/spaceweather.com\/\" target=\"_blank\" rel=\"noopener\"><em>SpaceWeather<\/em><\/a> vous pr\u00e9sente quotidiennement l&#8217;activit\u00e9 de notre \u00e9toile.<!--more--><\/p>\n<h5>Prot\u00e9gez vos yeux :<\/h5>\n<p>Si Galil\u00e9e, avec sa modeste lunette, pouvait d\u00e9j\u00e0 \u00e9tudier l&#8217;activit\u00e9 solaire il y a 400 ans, c&#8217;est que ce spectacle est accessible sans instrument on\u00e9reux. Une simple<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener\"> longue-vue<\/a>, une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/05\/bien-choisir-sa-premiere-lunette-astronomique\/\" target=\"_blank\" rel=\"noopener\">lunette astronomique<\/a> ou un petit t\u00e9lescope suffisent pour compter les taches et suivre leur transformation. Mais attention, il faut imp\u00e9rativement ne laisser entrer dans l&#8217;instrument qu&#8217;une infime partie de la lumi\u00e8re solaire.<\/p>\n<figure id=\"attachment_15016\" aria-describedby=\"caption-attachment-15016\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2.jpg\" rel=\"lightbox[15014]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15016\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2-450x113.jpg\" alt=\"\" width=\"450\" height=\"113\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2-450x113.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2-1024x258.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2-768x193.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/11\/sol2.jpg 1510w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15016\" class=\"wp-caption-text\">Avec le filtre ASTF 80, vous pouvez observer l&#8217;activit\u00e9 solaire en toute s\u00e9curit\u00e9.<\/figcaption><\/figure>\n<p>Stelvision propose un filtre solaire (<a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/filtre-solaire-astf80-pour-lunette-astronomique-stelescope-70-ou-equivalent\/\" target=\"_blank\" rel=\"noopener\">ASTF 80<\/a>) d&#8217;un excellent rapport qualit\u00e9\/prix. Ce filtre a une densit\u00e9 de 5.0, ce qui signifie qu&#8217;il ne laisse passer que 1\/100.000e du rayonnement solaire. Il est adaptable sur tout instrument dont le diam\u00e8tre du tube varie entre 10 et 17 centim\u00e8tres. Pour des diam\u00e8tres allant de 16 \u00e0 23 centim\u00e8tres, il existe le mod\u00e8le <a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/filtre-solaire-astf140-pour-telescope-stelescope-130-ou-equivalent\/\" target=\"_blank\" rel=\"noopener\">ASTF 140<\/a>. Ces filtres sont parfaits pour observer les taches sans danger. Ils vous accompagneront jusqu&#8217;au prochain maximum solaire et m\u00eame au del\u00e0.<\/p>\n<p><iframe loading=\"lazy\" title=\"Granulation et tache solaire\" width=\"474\" height=\"356\" src=\"https:\/\/www.youtube.com\/embed\/KS7dm3xZNZg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/09\/26\/uy-scuti-la-supergeante-1-700-fois-plus-grande-que-le-soleil\/\" target=\"_blank\" rel=\"noopener\">UY Scuti, la superg\u00e9ante 1.700 fois plus grande que le Soleil<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/06\/26\/solarigraphe-revele-soleil-dun-solstice-a-lautre\/\" target=\"_blank\" rel=\"noopener\">Un solarigraphe r\u00e9v\u00e8le le Soleil d&#8217;un solstice \u00e0 l&#8217;autre<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/04\/27\/un-soleil-omega-se-leve-sur-la-mer-mediterranee\/\" target=\"_blank\" rel=\"noopener\">Un &#8220;Soleil Om\u00e9ga&#8221; se l\u00e8ve sur la M\u00e9diterran\u00e9e<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Vous avez envie de suivre l&#8217;\u00e9volution de l&#8217;activit\u00e9 solaire ? Voici quelques conseils pour observer les taches du Soleil en toute s\u00e9curit\u00e9.\u00a0 De l&#8217;acn\u00e9 sur le Soleil : L\u2019activit\u00e9 solaire se mesure en d\u00e9nombrant les taches que l&#8217;on observe sur notre \u00e9toile. Une tache est une zone sombre car moins chaude que le gaz qui &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/03\/28\/comment-observer-lactivite-solaire-en-toute-securite\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Comment observer l&#8217;activit\u00e9 solaire en toute s\u00e9curit\u00e9<\/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":15015,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[97,845,261],"class_list":["post-15014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-soleil","tag-stelvision","tag-tache-solaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comment observer l&#039;activit\u00e9 solaire en toute s\u00e9curit\u00e9<\/title>\n<meta name=\"description\" content=\"Vous avez envie de suivre l&#039;\u00e9volution de l&#039;activit\u00e9 solaire ? 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