{"id":19145,"date":"2024-03-14T18:01:40","date_gmt":"2024-03-14T18:01:40","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=19145"},"modified":"2024-03-16T16:19:28","modified_gmt":"2024-03-16T16:19:28","slug":"splendeurs-dans-le-sillage-de-la-comete-12p-pons-brooks","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/03\/14\/splendeurs-dans-le-sillage-de-la-comete-12p-pons-brooks\/","title":{"rendered":"Splendeurs dans le sillage de la com\u00e8te 12P\/Pons-Brooks"},"content":{"rendered":"<p><strong>Chaque nuit, la queue de la com\u00e8te 12P\/Pons-Brooks se d\u00e9cline en de multiples variations. Un r\u00e9gal pour les astrophotographes.<\/strong><\/p>\n<h5>Progr\u00e8s fulgurants :<\/h5>\n<p>Le spectacle aurait fait r\u00eav\u00e9 Louis Thollon, qui observait et dessinait d\u00e9j\u00e0 la com\u00e8te 12P\/Pons-Brooks en 1884 \u00e0 l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/20\/la-grande-lunette-de-lobservatoire-de-nice\/\" target=\"_blank\" rel=\"noopener\">Observatoire de Nice<\/a>. Cet astronome fran\u00e7ais ne pouvait pas imaginer ce que l&#8217;on serait capable de photographier 140 ans plus tard :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19148\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1-423x450.jpg\" alt=\"\" width=\"423\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1-423x450.jpg 423w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1-962x1024.jpg 962w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1-768x817.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet1.jpg 1015w\" sizes=\"auto, (max-width: 423px) 100vw, 423px\" \/><\/a><\/p>\n<p>Il aura suffi \u00e0 la com\u00e8te de parcourir deux fois son orbite pour que notre vision des astres chevelus change radicalement. Gr\u00e2ce aux progr\u00e8s foudroyants de la photographie astronomique, les com\u00e8tes nous offrent des d\u00e9tails insoup\u00e7onn\u00e9s :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19152\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet2_3.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Depuis <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\">Galil\u00e9e<\/a>, les astronomes avaient appris \u00e0 dessiner les astres pour garder une trace de leurs observations. Certains \u00e9taient pass\u00e9s ma\u00eetres dans l&#8217;art de &#8220;croquer&#8221; les crat\u00e8res lunaires et les surfaces plan\u00e9taires. Mais comment repr\u00e9senter l&#8217;invisible (ou presque) ? Car c&#8217;est bien le probl\u00e8me que l&#8217;on rencontre avec les queues de gaz des com\u00e8tes (appel\u00e9es aussi queues ioniques), particuli\u00e8rement t\u00e9nues.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19153\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet4-3.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p><!--more--><\/p>\n<h5>Le r\u00f4le du vent solaire :<\/h5>\n<p>Rappelons qu&#8217;une com\u00e8te est un agglom\u00e9rat de poussi\u00e8res et de glaces d&#8217;eau. En s&#8217;approchant du Soleil, la com\u00e8te voit sa surface se sublimer. Les glaces d&#8217;eau qui la composent passe directement de l&#8217;\u00e9tat solide \u00e0 l&#8217;\u00e9tat gazeux, propulsant dans l&#8217;espace les poussi\u00e8res. Ces derni\u00e8res vont former une queue de poussi\u00e8re (blanche), repouss\u00e9e par la pression de radiation solaire.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19154\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3-1024x613.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet8_3.jpg 1501w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>De leur c\u00f4t\u00e9, les mol\u00e9cules de gaz qui se sont \u00e9chapp\u00e9es de l&#8217;astre chevelu vont \u00e9mettre une lumi\u00e8re bleut\u00e9e en raison d&#8217;un ph\u00e9nom\u00e8ne de fluorescence. Cette queue ionique qui s&#8217;\u00e9tire tr\u00e8s loin derri\u00e8re le noyau de la com\u00e8te subit les effets du champ magn\u00e9tique solaire. Les variations de ce champ magn\u00e9tique modifient en permanence l&#8217;aspect de la queue ionique. C&#8217;est ce spectacle qu&#8217;immortalisent chaque nuit les meilleurs astrophotographes.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19155\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3-450x269.jpg\" alt=\"\" width=\"450\" height=\"269\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3-450x269.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3-1024x612.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3-768x459.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet9_3.jpg 1505w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Des images de toute beaut\u00e9 propos\u00e9es par <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=1368587510695631&amp;set=a.574935243394199\" target=\"_blank\" rel=\"noopener\">Daniel Nimmervoll<\/a>, <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=7275496505864524&amp;set=a.970759783004926\" target=\"_blank\" rel=\"noopener\">Michael J\u00e4ger<\/a>, <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=10161462068478881&amp;set=a.103660903880\" target=\"_blank\" rel=\"noopener\">Benoit De Mulder<\/a>, <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=10224953325605298&amp;set=pcb.10161139490434140\" target=\"_blank\" rel=\"noopener\">Rocco Scarnecchia<\/a> ou encore <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=1960508671035369&amp;set=a.464469083972676\" target=\"_blank\" rel=\"noopener\">Steed Yu<\/a>. De quoi nous faire r\u00eaver, \u00e0 d\u00e9faut de pouvoir l&#8217;observer dans un t\u00e9lescope !<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3.jpg\" rel=\"lightbox[19145]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-19159\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/03\/comet11_3.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/03\/10\/comete-12p-pons-brooks-nos-conseils-pour-lobserver\/\" target=\"_blank\" rel=\"noopener\">Com\u00e8te 12P\/Pons-Brooks : nos conseils pour l&#8217;observer<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/02\/12\/la-comete-12p-pons-brooks-devoile-ses-charmes\/\" target=\"_blank\" rel=\"noopener\">La com\u00e8te 12P\/Pons-Brooks d\u00e9voile ses charmes<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/09\/02\/la-comete-nishimura-assaillie-par-le-vent-solaire\/\" target=\"_blank\" rel=\"noopener\">La com\u00e8te Nishimura assaillie par le vent solaire<\/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>Chaque nuit, la queue de la com\u00e8te 12P\/Pons-Brooks se d\u00e9cline en de multiples variations. Un r\u00e9gal pour les astrophotographes. Progr\u00e8s fulgurants : Le spectacle aurait fait r\u00eav\u00e9 Louis Thollon, qui observait et dessinait d\u00e9j\u00e0 la com\u00e8te 12P\/Pons-Brooks en 1884 \u00e0 l&#8217;Observatoire de Nice. Cet astronome fran\u00e7ais ne pouvait pas imaginer ce que l&#8217;on serait capable &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/03\/14\/splendeurs-dans-le-sillage-de-la-comete-12p-pons-brooks\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Splendeurs dans le sillage de la com\u00e8te 12P\/Pons-Brooks<\/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":19146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3436],"class_list":["post-19145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-comete-12p-pons-brooks"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Splendeurs dans le sillage de la com\u00e8te 12P\/Pons-Brooks<\/title>\n<meta name=\"description\" content=\"Chaque nuit, la queue de la com\u00e8te 12P\/Pons-Brooks se d\u00e9cline en de multiples variations. 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