{"id":18149,"date":"2023-07-30T15:25:31","date_gmt":"2023-07-30T15:25:31","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=18149"},"modified":"2023-08-19T09:40:04","modified_gmt":"2023-08-19T09:40:04","slug":"eruption-surprise-de-la-comete-12p-pons-brooks","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/07\/30\/eruption-surprise-de-la-comete-12p-pons-brooks\/","title":{"rendered":"\u00c9ruption surprise de la com\u00e8te 12P\/Pons-Brooks"},"content":{"rendered":"<p><strong>Attendue au printemps 2024, la com\u00e8te 12P\/Pons-Brooks est devenue beaucoup plus brillante le temps d&#8217;une forte \u00e9ruption.\u00a0<\/strong><\/p>\n<h5>Une com\u00e8te \u00e0 moiti\u00e9 fran\u00e7aise :<\/h5>\n<p>La com\u00e8te 12P\/Pons- Brooks a \u00e9t\u00e9 rep\u00e9r\u00e9e le 12 juillet 1812 par Jean-Louis Pons. Cet astronome fran\u00e7ais est c\u00e9l\u00e8bre pour ses d\u00e9couvertes com\u00e9taires. N\u00e9 en 1761, Pons grandit dans une modeste famille au milieu de ses dix fr\u00e8res et s\u0153urs. En 1789, il devient le concierge de l\u2019<a href=\"https:\/\/www.marseille.fr\/culture\/patrimoine-culturel\/observatoire-de-marseille\" target=\"_blank\" rel=\"noopener\">Observatoire de Marseille<\/a>. Analphab\u00e8te mais passionn\u00e9 d\u2019astronomie, il d\u00e9niche sa premi\u00e8re com\u00e8te en 1801 avec une lunette de sa fabrication. Il suit parall\u00e8lement des cours d\u2019astronomie \u00e0 l\u2019observatoire. Son excellente vue et sa t\u00e9nacit\u00e9 vont lui permettre de d\u00e9couvrir 37 astres chevelus en 26 ans !<\/p>\n<figure id=\"attachment_18151\" aria-describedby=\"caption-attachment-18151\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4.jpg\" rel=\"lightbox[18149]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18151\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4-450x254.jpg\" alt=\"\" width=\"450\" height=\"254\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4-450x254.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4-1024x578.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4-768x434.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons4.jpg 1080w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18151\" class=\"wp-caption-text\">Dessins de la com\u00e8te Pons-Brooks lors de son passage de 1884. \u00a9 Henry Cooper Wilson<\/figcaption><\/figure>\n<p>La com\u00e8te de Pons a \u00e9t\u00e9 red\u00e9couverte en 1883 par l&#8217;astronome am\u00e9ricain William Robert Brooks, d&#8217;o\u00f9 son double nom. Il s&#8217;agit d&#8217;une com\u00e8te p\u00e9riodique qui revient nous voir tous les 71 ans environ. Certains de ses pr\u00e9c\u00e9dents passages on \u00e9t\u00e9 observ\u00e9s depuis l&#8217;an 1385, mais sa p\u00e9riodicit\u00e9 n&#8217;a \u00e9t\u00e9 \u00e9tablie qu&#8217;au XIXe si\u00e8cle.<!--more--><\/p>\n<h5>\u00c9ruption surprise :<\/h5>\n<p>12P\/Pons-Brooks passera au plus pr\u00e8s du Soleil (120 millions de kilom\u00e8tres) le 21 avril 2024. Treize jours plus t\u00f4t, elle devrait \u00eatre observable pendant les quelques minutes d&#8217;obscurit\u00e9 de la prochaine <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/06\/08\/lamerique-se-prepare-pour-sa-prochaine-grande-eclipse\/\" target=\"_blank\" rel=\"noopener\">Grande \u00e9clipse am\u00e9ricaine<\/a>. Mais alors qu&#8217;elle est encore \u00e0 3,5 <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-unite-astronomique-63\/\" target=\"_blank\" rel=\"noopener\">Unit\u00e9s Astronomiques<\/a>, son \u00e9clat est pass\u00e9 de la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> 17 \u00e0 la magnitude 12, ce qui l&#8217;a rendue cent fois plus brillante !<\/p>\n<figure id=\"attachment_18154\" aria-describedby=\"caption-attachment-18154\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3.jpg\" rel=\"lightbox[18149]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-18154 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons3.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18154\" class=\"wp-caption-text\">Variation d&#8217;\u00e9clat de la com\u00e8te 12P. Images Shinichi Watanabe, graphique Fran\u00e7ois Kugel<\/figcaption><\/figure>\n<p>Les sursauts d\u2019\u00e9clat observ\u00e9s sur certaines com\u00e8tes pourrait s&#8217;expliquer par le cryovolcanisme. Sous l\u2019action du Soleil, la surface de la com\u00e8te fondrait par endroits, lib\u00e9rant brutalement d\u2019\u00e9normes quantit\u00e9s de gaz et de poussi\u00e8re. Des \u00e9ruptions r\u00e9guli\u00e8res qui expliqueraient les brusques augmentations de luminosit\u00e9, comme celles enregistr\u00e9es par exemple sur <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/04\/12\/eruption-de-glace-en-direct-sur-la-comete-29p-s-w\/\" target=\"_blank\" rel=\"noopener\">29P\/S-W<\/a>.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5.jpg\" rel=\"lightbox[18149]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-18155\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5-450x393.jpg\" alt=\"\" width=\"450\" height=\"393\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5-450x393.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5-1024x893.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5-768x670.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/07\/pons5.jpg 1096w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Pour en savoir plus, vous pouvez consulter les articles de <a href=\"https:\/\/skyandtelescope.org\/astronomy-news\/see-comet-12p-pons-brooks-in-outburst\/\" target=\"_blank\" rel=\"noopener\"><em>Sky and Telescope<\/em><\/a>, <a href=\"https:\/\/www.astronomy.com\/observing\/comet-pons-brooks-just-had-an-outburst-heres-how-to-find-it\/\" target=\"_blank\" rel=\"noopener\"><em>Astronomy<\/em><\/a> et les images de la com\u00e8te sur la page de <a href=\"http:\/\/www.aerith.net\/comet\/catalog\/0012P\/2024-pictures.html\" target=\"_blank\" rel=\"noopener\">Seiichi Yoshida<\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/02\/07\/lexplosion-dune-comete-aurait-decime-des-peuples-amerindiens\/\" target=\"_blank\" rel=\"noopener\">L\u2019explosion d\u2019une com\u00e8te aurait d\u00e9cim\u00e9 des peuples Am\u00e9rindiens<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/12\/28\/dans-le-ciel-de-la-palma-la-comete-leonard-fait-son-show\/\" target=\"_blank\" rel=\"noopener\">Dans le ciel de La Palma, la com\u00e8te Leonard fait son show<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/12\/23\/en-avril-1066-le-retour-de-la-comete-de-halley-fut-exceptionnel\/\" target=\"_blank\" rel=\"noopener\">En 1066, le passage de la com\u00e8te de Halley fut exceptionnel<\/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>Attendue au printemps 2024, la com\u00e8te 12P\/Pons-Brooks est devenue beaucoup plus brillante le temps d&#8217;une forte \u00e9ruption.\u00a0 Une com\u00e8te \u00e0 moiti\u00e9 fran\u00e7aise : La com\u00e8te 12P\/Pons- Brooks a \u00e9t\u00e9 rep\u00e9r\u00e9e le 12 juillet 1812 par Jean-Louis Pons. Cet astronome fran\u00e7ais est c\u00e9l\u00e8bre pour ses d\u00e9couvertes com\u00e9taires. N\u00e9 en 1761, Pons grandit dans une modeste famille &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/07\/30\/eruption-surprise-de-la-comete-12p-pons-brooks\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c9ruption surprise 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":18150,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3436,591],"class_list":["post-18149","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-comete-12p-pons-brooks","tag-cryovolcanisme"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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