{"id":143,"date":"2009-06-12T19:35:00","date_gmt":"2009-06-12T17:35:00","guid":{"rendered":"https:\/\/treva.cat\/2009\/06\/12\/lespatlla-del-gegant\/"},"modified":"2022-11-25T09:15:22","modified_gmt":"2022-11-25T07:15:22","slug":"lespatlla-del-gegant","status":"publish","type":"post","link":"https:\/\/treva.cat\/es\/lespatlla-del-gegant\/","title":{"rendered":"El hombro del gigante"},"content":{"rendered":"Tot i viure sota un cel lum\u00ednicament contaminat, des de petit m&#8217;han cridat l&#8217;atenci\u00f3 els astres. Crec que els homes necessitem que se&#8217;ns recordi sistem\u00e0ticament que no som el centre del univers i un bany de petitesa no ve mai malament en un m\u00f3n ple de prepot\u00e8ncia. I l&#8217;univers et posa al teu lloc en un instant. I si he de destacar un sol astre que em cridi l&#8217;atenci\u00f3 us diria que se&#8217;ns dubte \u00e9s Betelgeuse. La super-gegant vermella que domina els cels d&#8217;hivern des de la seva posici\u00f3 privilegiada per sobre i a la  dreta del cintur\u00f3 d&#8217;Ori\u00f3, la refer\u00e8ncia m\u00e9s clara que podem trobar al cel nocturn despr\u00e9s de la lluna  i de l&#8217;Ossa Major.   Voleu saber alguns detalls d&#8217;aquest astre tant especial? <ul><li>Potser \u00e9s l&#8217;estel del que podem percebre m\u00e9s clarament i sense ajuda de cap instrument \u00f2ptic la seva tonalitat ataronjada.<\/li><li>Ara estem veient la llum que va generar l&#8217;astre quan Cervantes es traslladava de Valladolid a Madrid fruit de l&#8217;\u00e8xit de la primera part del Quixot. O sigui, est\u00e0 a uns 400 anys-llum de dist\u00e0ncia. A m\u00e9s, s&#8217;allunya de nosaltres a 20 km\/s.<\/li><li>La seva energia supera a la del sol de manera gaireb\u00e9 insultant. \u00c9s una estrella variable. Combina \u00e8poques d&#8217;esplendor, amb altres de languidesa, per\u00f2 quan est\u00e0 en hores baixes brilla 7.600 vegades m\u00e9s que el nostre sol. En plena forma, arriba a multiplicar la lluminositat del sol en 14.000 cops.<\/li><li>La seva variabilitat \u00e9s deguda a que palpita com un cor. Quan est\u00e0 contreta i petitona, tindria un di\u00e0metre com la \u00f2rbita de Mart (900 vegades m\u00e9s gran que el nostre sol),i \u00e9s quan resulta m\u00e9s brillant. Quan s&#8217;expandeix arribaria a tenir el di\u00e0metre de l&#8217;\u00f2rbita de J\u00fapiter (1.500 vegades el di\u00e0metre del sol).<\/li><\/ul>I malgrat aix\u00f2, Betelgeuse s&#8217;est\u00e0 morint. I des de aqu\u00ed baix sembla immutable, omnipotent, la reina de l&#8217;univers. Ni els astres m\u00e9s admirables del cel s\u00f3n per sempre.  M\u00e9s informaci\u00f3: <a href=\"http:\/\/www.astronomos.org\/articulistas\/Lonnie\/Betelgeuse.htm\">http:\/\/www.astronomos.org\/articulistas\/Lonnie\/Betelgeuse.htm<\/a><a href=\"http:\/\/en.wikipedia.org\/wiki\/Orion_(constellation)\">http:\/\/en.wikipedia.org\/wiki\/Orion_(constellation)<\/a><a href=\"http:\/\/en.wikipedia.org\/wiki\/File:Orion_3008_huge.jpg\">http:\/\/en.wikipedia.org\/wiki\/File:Orion_3008_huge.jpg<\/a><a href=\"http:\/\/www.celfosc.org\/\">http:\/\/www.celfosc.org\/<\/a>\n<p><a href=\"https:\/\/www.skyatnightmagazine.com\/advice\/skills\/orion-constellation-best-targets-observe\/\">https:\/\/www.skyatnightmagazine.com\/advice\/skills\/orion-constellation-best-targets-observe\/<\/a><\/p>\n<p><a\u00a0href=\"https: www.skyatnightmagazine.com=\"\" advice=\"\" skills=\"\" orion-constellation-best-targets-observe=\"\" \"=\"\"><br><\/a\u00a0href=\"https:><\/p>","protected":false},"excerpt":{"rendered":"<p>Betelgeuse, l&#8217;estrella vermella d&#8217;Ori\u00f2<\/p>","protected":false},"author":1,"featured_media":749,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[92],"tags":[],"class_list":["post-143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-efectes-secundaris"],"_links":{"self":[{"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/posts\/143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/comments?post=143"}],"version-history":[{"count":3,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/posts\/143\/revisions"}],"predecessor-version":[{"id":751,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/posts\/143\/revisions\/751"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/media\/749"}],"wp:attachment":[{"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/media?parent=143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/categories?post=143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/treva.cat\/es\/wp-json\/wp\/v2\/tags?post=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}