{"id":2427,"date":"2016-11-14T23:48:20","date_gmt":"2016-11-14T22:48:20","guid":{"rendered":"http:\/\/agora.xtec.cat\/institutcanplanas\/?p=2427"},"modified":"2016-11-15T18:56:50","modified_gmt":"2016-11-15T17:56:50","slug":"la-mare-de-totes-les-superllunes","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/institutcanplanas\/portada\/la-mare-de-totes-les-superllunes\/","title":{"rendered":"La mare de totes les superllunes"},"content":{"rendered":"<p>Aquest dilluns, 14 de novembre del 2016, \u00e9s un dia assenyalat, tenim l&#8217;oportunitat de veure <a href=\"http:\/\/www.elperiodico.cat\/ca\/noticias\/ciencia\/per-que-tan-especial-superlluna-daquest-dilluns-5625127\"><strong>la Lluna m\u00e9s gran i brillant<\/strong><\/a> des del 25 de gener de 1948.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/xQQK2qI7YnKGClCbO_j_brWnCil7rc1m4gc3921LX475MH81oMBCuqLYC8lbN82FdzqloOWD0B-ks0jOE4_2_wyD3WAjgA-6NZm2-2lSQkLP18DgZlELKGGZzQRMJe5Ja_YDnct2ThIkvLW29Vk78rtdEOfwOObB8QpCEdJgdyAmexbn2zQCSudtEIh98_rjf-vD8YjxLwyA_pZIiyjjSFCnMSYTEtWstyYIUbHAZKpwe4T0g4gRzKr3P1RD0blHmJSoWFCUAPgvmPQs9j3KIefjgM-5d0QhI-n1cO60R9Bq2sjCqs530H_qUpTy_iRG3tdYxZ2uI78EwvaiG8JEKg1VS_rIAo3q2ugUfonp8Rqf5bB2BOPd4v_RwCCaKNrPciLukUch6biQvDGmHdoinXjevHguABnhDNWI6ww-yAsWwj2mzxqZuR7uQZ486Mn5I6bB9THYYyxShpcQKmhTK-0iSZNsYUvIKi1qJ_RBN3njBQaBmcU9kq2C4lFWIYW8qUnFSxfv9I5a7b4_M6u3wLHz3yNR9BaWfrmGvWjm1bVdxoFf080WowjTR2YxcUDDjKOiHi-mXMHIJrntwM_l_HuNLhp51MCJAbGklrNeC50wfQne=w338-h254-no\" \/><\/p>\n<p><!--more--><\/p>\n<p>Les \u00f2rbites dels astres no s\u00f3n circulars sin\u00f3 el\u00b7l\u00edptiques. La Lluna, en el seu viatge al voltant de la Terra, t\u00e9 un m\u00e0xim acostament de 356.500 km (perigeu) i un m\u00e0xim allunyament de 406.000 km (apogeu). I la Terra, en el seu viatge al voltant del Sol, s&#8217;acosta un m\u00e0xim de 147 milions de quil\u00f2metres i s&#8217;allunya un m\u00e0xim de 152. Reunim coincid\u00e8ncies i considerem la situaci\u00f3 en qu\u00e8 s&#8217;arriba al perigeu molt a prop del moment en qu\u00e8 s&#8217;alineen el Sol, la Lluna i la Terra. La difer\u00e8ncia ser\u00e0 avui de tot just dues hores, i per aix\u00f2 la Lluna plena es veur\u00e0 un 14% m\u00e9s gran i fins a un 30% m\u00e9s brillant del que \u00e9s habitual. A m\u00e9s, en aquell instant la Lluna estar\u00e0 a 147.985.477 km del Sol, \u00e9s a dir, tamb\u00e9 molt a prop del seu m\u00e0xim acostament a l&#8217;estrella, una ajuda suplement\u00e0ria per a un pleniluni esplendor\u00f3s (a les 00.00 la il\u00b7luminaci\u00f3 ser\u00e0 del 99,4%). Fins aqu\u00ed les millors condicions per a l&#8217;objecte observat. Per\u00f2 un simple nuvolet pot arru\u00efnar la festa, aix\u00ed que tamb\u00e9 conv\u00e9 optimitzar les condicions del subjecte observador.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/lh3.googleusercontent.com\/nZwCNn4WXxrOcQhEveWpH6OYOJz1Excbh78ucFs4ov4epw6fEsnYiloAKjVwRXYWyLqV6h52vrMmZxEnNjKisH0V72Xk1zlncSHX4e_KctZ0g6-qgx9er5XYQXEfSt69LOzOsmQi1X1YtgesHIC8DFvZPHadJBqs8wMVRYvgMnjNUZpFX-I9YPMIgdQJrwIesiuJRHIwXimxNWi8KF4pgaii0A8UAMiPD1hBVqSeuoIYqv-Ykr8SZW77d4cBVayeHq3SOMH55nHbfx8AKFRv7-_2z-5n2rO8XlHegLSRMsxzsIcGTkMRo7u1pMDLVedrqyCAudiQfesNHqwxBuYXushwCXhbOBW9OvbvNLrbM-UXnFuq3S0ivBEKDoxdJz07T-FNHj3yAvc1O1wuOc5SwZoWoxRGH5lSCiPWxEMEgC_4o-Nig-nJcFrkCJQg5glztX5am5MKGmG3L1LtFm3lys9oFkO5cFN5wg0Ewo9YofFLcwCHLt0hWejafiRWE1rHl9ocZ0311qTzk8Jiw-voRK-lQJnkqWUpbWXmhTIBh6-gbeGmNro6x4-7Wsp-EGGMH8QVIKsMIicLjVyJMedTA01wsO2nJrlJ4LLS84CcMRxDvQSN=w223-h297-no\" width=\"341\" height=\"454\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aquest dilluns, 14 de novembre del 2016, \u00e9s un dia assenyalat, tenim l&#8217;oportunitat de veure la Lluna m\u00e9s gran i brillant des del 25 de gener de 1948.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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