{"id":22836,"date":"2026-06-06T20:20:07","date_gmt":"2026-06-06T20:20:07","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22836"},"modified":"2026-06-06T20:22:52","modified_gmt":"2026-06-06T20:22:52","slug":"deces-de-alan-hale-co-decouvreur-de-la-comete-hale-bopp","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/06\/deces-de-alan-hale-co-decouvreur-de-la-comete-hale-bopp\/","title":{"rendered":"Co-d\u00e9couvreur de la com\u00e8te Hale-Bopp, Alan Hale est d\u00e9c\u00e9d\u00e9"},"content":{"rendered":"<p><strong>Alan Hale est d\u00e9c\u00e9d\u00e9 le 6 juin 2026. Avec Thomas Bopp, ils avaient d\u00e9couvert la c\u00e9l\u00e8bre com\u00e8te Hale-Bopp en juillet 1995.<\/strong><\/p>\n<h5>Une com\u00e8te pour l&#8217;\u00e9ternit\u00e9 :<\/h5>\n<p>Si le nom de Alan Hale est bien connu des astronomes, c&#8217;est parce que cet am\u00e9ricain a co-d\u00e9couvert l&#8217;une des plus brillantes com\u00e8tes du XXe si\u00e8cle, C\/1995 O1, la nuit du 22 au 23 juillet 1995. \u00c0 l&#8217;\u00e9poque, il est d\u00e9j\u00e0 un passionn\u00e9 de com\u00e8tes : il en a observ\u00e9 pr\u00e8s de deux cents, la premi\u00e8re en 1970. C&#8217;est pour assouvir sa passion qu&#8217;il s&#8217;est install\u00e9 \u00e0 <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Cloudcroft\" target=\"_blank\" rel=\"noopener\">Cloudcroft<\/a>, au Nouveau-Mexique. Perch\u00e9 \u00e0 2.500 m\u00e8tres d&#8217;altitude, l&#8217;endroit est r\u00e9put\u00e9 pour son ciel particuli\u00e8rement noir. Le soir du 22 juillet 1995, il a d\u00e9cid\u00e9 d&#8217;observer <a href=\"https:\/\/fr.wikipedia.org\/wiki\/6P\/d%27Arrest\" target=\"_blank\" rel=\"noopener\">6P\/d&#8217;Arrest<\/a>. Il s&#8217;agit d&#8217;une com\u00e8te p\u00e9riodique d\u00e9couverte en 1851 par l&#8217;astronome prussien <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Heinrich_Louis_d%27Arrest\" target=\"_blank\" rel=\"noopener\">Heinrich Louis d&#8217;Arrest<\/a>. En attendant que l&#8217;astre chevelu se l\u00e8ve, l&#8217;astronome d\u00e9cide de pointer son t\u00e9lescope en direction de la<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Sagittaire_(constellation)\" target=\"_blank\" rel=\"noopener\"> constellation du Sagittaire<\/a> :<\/p>\n<figure id=\"attachment_22838\" aria-describedby=\"caption-attachment-22838\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2.jpg\" rel=\"lightbox[22836]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-22838 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2-450x381.jpg\" alt=\"\" width=\"450\" height=\"381\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2-450x381.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2-1024x866.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2-768x650.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb2.jpg 1064w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-22838\" class=\"wp-caption-text\">Alan Hale aux c\u00f4t\u00e9s du t\u00e9lescope avec lequel il a d\u00e9couvert C\/1995 O1. Cr\u00e9dit Karen Lowe<\/figcaption><\/figure>\n<p>On dit que le hasard n&#8217;existe pas. Qu&#8217;est ce qui l&#8217;a pouss\u00e9 \u00e0 viser l&#8217;amas globulaire <a href=\"https:\/\/fr.wikipedia.org\/wiki\/M70_(amas_globulaire)\" target=\"_blank\" rel=\"noopener\">Messier 70<\/a> ? On ne le saura jamais. Dans cette portion du Sagittaire, les objets n\u00e9buleux ne manquent pas. Mais l&#8217;homme connait le ciel sur le bout du doigt, et la consultation de ses atlas c\u00e9lestes n&#8217;y change rien. Il y a bel et bien une petite tache floue inconnue \u00e0 proximit\u00e9 de cet amas !<!--more--><\/p>\n<h5>De l&#8217;ombre \u00e0 la lumi\u00e8re :<\/h5>\n<p>Alan Hale c&#8217;est qu&#8217;il faut faire vite. Il mesure donc la position de l&#8217;objet et transmet l&#8217;information dans un courriel adress\u00e9 au Minor Planet Center (<a href=\"https:\/\/www.minorplanetcenter.net\/\" target=\"_blank\" rel=\"noopener\">MPC<\/a>). Sans se douter que cinq cents kilom\u00e8tres \u00e0 l&#8217;ouest, du c\u00f4t\u00e9 de <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Phoenix_(Arizona)\" target=\"_blank\" rel=\"noopener\">Phoenix<\/a>, un autre amateur, <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Thomas_Bopp\" target=\"_blank\" rel=\"noopener\">Thomas Bopp<\/a>, vit les m\u00eames \u00e9motions. La d\u00e9couverte de C\/1995 O1 (Hale-Bopp) est annonc\u00e9e officiellement dans la journ\u00e9e du 23 juillet 1995 :<\/p>\n<figure id=\"attachment_22839\" aria-describedby=\"caption-attachment-22839\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3.jpg\" rel=\"lightbox[22836]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-22839 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3-450x450.jpg\" alt=\"\" width=\"450\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3-450x450.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3-150x150.jpg 150w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3-768x768.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/06\/hb3.jpg 900w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-22839\" class=\"wp-caption-text\">C\/1995 O1 photographi\u00e9e le 4 avril 1997 avec une chambre de Schmidt (diam\u00e8tre 225 millim\u00e8tres, ouverture f\/2) et une exposition de dix minutes sur Kodak Panther 400. Cr\u00e9dit Johannes-Kepler-Observatory<\/figcaption><\/figure>\n<p>La com\u00e8te devient visible \u00e0 l&#8217;oeil nu de mai 1996 \u00e0 d\u00e9cembre 1997, un record. Elle est m\u00eame observable en plein jour durant <a href=\"https:\/\/fr.wikipedia.org\/wiki\/%C3%89clipse_solaire_du_9_mars_1997\" target=\"_blank\" rel=\"noopener\">l&#8217;\u00e9clipse totale du 9 mars 1997<\/a>. Le mois suivant, lors du p\u00e9rih\u00e9lie, la t\u00eate de la com\u00e8te brille avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de -1 sur l&#8217;horizon Nord-Ouest apr\u00e8s le coucher du Soleil ! Pour Alan Hale et Thomas Bopp, ce fut la cons\u00e9cration et leur vie en fut transform\u00e9e. Alan pu enfin d\u00e9velopper son institut et vivre confortablement de sa passion pour les com\u00e8tes. Il en a ensuite observ\u00e9 plus de 700, avec toujours le m\u00eame t\u00e9lescope qui lui a servi pour d\u00e9couvrir C\/1995 O1. Il vient donc de rejoindre les \u00e9toiles, ou l&#8217;attend Thomas Bopp, d\u00e9c\u00e9d\u00e9 en 2018.<\/p>\n<p><em>Texte extrait de mon article &#8220;Hale-Bopp, histoire d&#8217;une incroyable d\u00e9couverte&#8221;, paru dans le n\u00b0137 de la revue <a href=\"https:\/\/astrosurf-magazine.com\/\" target=\"_blank\" rel=\"noopener\">Astrosurf Magazine<\/a>.<\/em><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/07\/23\/la-grande-comete-hale-bopp-etait-decouverte-il-y-a-30-ans\/\" target=\"_blank\" rel=\"noopener\">La grande com\u00e8te Hale-Bopp \u00e9tait d\u00e9couverte il y a 30 ans<\/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<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/10\/17\/des-cryovolcans-responsables-des-sursauts-de-la-comete-29p-s-w\/\" target=\"_blank\" rel=\"noopener\">Des cryovolcans \u00e0 l\u2019origine des sursauts de la com\u00e8te 29P\/S-W<\/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>Alan Hale est d\u00e9c\u00e9d\u00e9 le 6 juin 2026. Avec Thomas Bopp, ils avaient d\u00e9couvert la c\u00e9l\u00e8bre com\u00e8te Hale-Bopp en juillet 1995. Une com\u00e8te pour l&#8217;\u00e9ternit\u00e9 : Si le nom de Alan Hale est bien connu des astronomes, c&#8217;est parce que cet am\u00e9ricain a co-d\u00e9couvert l&#8217;une des plus brillantes com\u00e8tes du XXe si\u00e8cle, C\/1995 O1, la &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/06\/deces-de-alan-hale-co-decouvreur-de-la-comete-hale-bopp\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Co-d\u00e9couvreur de la com\u00e8te Hale-Bopp, Alan Hale est d\u00e9c\u00e9d\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":22837,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3356,1169,1395,3781],"class_list":["post-22836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-alan-hale","tag-c1995-o1","tag-comete-hale-bopp","tag-thomas-bopp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Co-d\u00e9couvreur de la com\u00e8te Hale-Bopp, Alan Hale est d\u00e9c\u00e9d\u00e9<\/title>\n<meta name=\"description\" content=\"Alan Hale est d\u00e9c\u00e9d\u00e9 le 6 juin 2026. 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