{"id":166,"date":"2018-11-20T20:49:39","date_gmt":"2018-11-20T19:49:39","guid":{"rendered":"https:\/\/astrogarrotxa.wordpress.com\/?p=166"},"modified":"2019-06-13T08:07:52","modified_gmt":"2019-06-13T06:07:52","slug":"una-superterra-a-lestrella-de-barnard","status":"publish","type":"post","link":"https:\/\/www.astrogarrotxa.cat\/?p=166","title":{"rendered":"Una superterra a l&#8217;estrella de Barnard"},"content":{"rendered":"<div class=\"art-postmetadataheader\">\n<h2 class=\"art-postheader\"><a href=\"http:\/\/astrosabadell.org\/ca\/inici\/noticies\/1503-una-superterra-a-l-estrella-de-barnard\">Una superterra a l&#8217;estrella de Barnard<\/a><\/h2>\n<\/div>\n<div class=\"art-postcontent clearfix\">\n<div class=\"art-article\">\n<p>15 novembre 2018<\/p>\n<p><img decoding=\"async\" class=\"alignright\" src=\"http:\/\/astrosabadell.org\/images\/Categories\/inici\/noticies\/noticia_superterra2.jpg\" alt=\"noticia superterra2\" \/>Un equip liderat per Ignasi Ribas (Institut d&#8217;Estudis Espacials de Catalunya) i Guillem Anglada (Universitat Queen Mary de Londres) han trobat, despr\u00e9s d&#8217;un curos an\u00e0lisi, que hi ha un 99% de possibilitats que hi hagi un exoplaneta a l&#8217;estrella de Barnard. \u00c9s l&#8217;estrella m\u00e9s r\u00e0pida del cel nocturn, situada a tan sols 6 anys llum de dist\u00e0ncia. L&#8217;exoplaneta, anomenat Barnard b, t\u00e9 una massa d\u2019almenys 3,2 vegades la Terra, una superterra, amb una \u00f2rbita de 233 dies de per\u00edode. S&#8217;han utilitzat dades d&#8217;un gran conjunt de telescopis. \u00c9s un m\u00f3n gelat i d\u00e8bilment il\u2022luminat; nom\u00e9s rep un 2% de l&#8217;energia que la Terra rep del Sol. Est\u00e0 a una dist\u00e0ncia de nom\u00e9s 0,4 vegades la que separa el Sol de la Terra, es troba prop de la l\u00ednia de neu, la regi\u00f3 on compostos vol\u00e0tils com l&#8217;aigua poden condensar-se en gel s\u00f2lid. Aquest m\u00f3n gelat i d&#8217;ombra podria tenir una temperatura de \u2013170 \u00b0C, fent-lo inh\u00f2spit per a la vida tal com la coneixem. Despr\u00e9s del planeta trobat en Proxima Centauri \u00e9s el segon exoplaneta conegut m\u00e9s proper a la Terra. M\u00e9s informaci\u00f3 en l\u2019<a href=\"https:\/\/www.eso.org\/public\/spain\/news\/eso1837\/?lang\" target=\"_blank\" rel=\"noopener noreferrer\">ESO<\/a>.<\/p>\n<p>Not\u00edcia <a id=\"community-tab\" class=\"publisher-nav-color\" href=\"https:\/\/disqus.com\/home\/forums\/lastronomica\/\" name=\"L'Astron\u00f2mica de Sabadell\"><span class=\"community-name\"><strong>L&#8217;Astron\u00f2mica de Sabadell<\/strong><\/span><\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Una superterra a l&#8217;estrella de Barnard 15 novembre 2018 Un equip liderat per Ignasi Ribas (Institut d&#8217;Estudis Espacials de Catalunya) i Guillem Anglada (Universitat Queen Mary de Londres) han trobat, despr\u00e9s d&#8217;un curos an\u00e0lisi, que hi ha un 99% de possibilitats que hi hagi un exoplaneta a l&#8217;estrella de Barnard. \u00c9s l&#8217;estrella m\u00e9s r\u00e0pida del [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-166","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/posts\/166"}],"collection":[{"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=166"}],"version-history":[{"count":1,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/posts\/166\/revisions"}],"predecessor-version":[{"id":328,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=\/wp\/v2\/posts\/166\/revisions\/328"}],"wp:attachment":[{"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astrogarrotxa.cat\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}