{"id":38806,"date":"2024-06-21T06:00:00","date_gmt":"2024-06-21T04:00:00","guid":{"rendered":"https:\/\/omnesmag.com\/?p=38806"},"modified":"2024-06-21T10:35:25","modified_gmt":"2024-06-21T08:35:25","slug":"scienziati-cattolici-jorge-juan","status":"publish","type":"post","link":"https:\/\/www.omnesmag.com\/it\/actualidad\/cientificos-catolicos-jorge-juan\/","title":{"rendered":"Scienziati cattolici: George John, autore del pi\u00f9 bel trattato navale d'Europa"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Jorge Juan y Santacilia (5 gennaio 1713 - 21 giugno 1773) fu un uomo di mare spagnolo che si distinse come scienziato, ingegnere navale e funzionario pubblico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rimase orfano all'et\u00e0 di tre anni e lo zio si occup\u00f2 della sua educazione. All'et\u00e0 di 12 anni fu inviato a Malta, dove fu ammesso come paggio del Gran Maestro dell'Ordine. All'et\u00e0 di 16 anni fu ammesso come cavaliere a pieno titolo, il che implicava il voto perpetuo di celibato.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tornato in Spagna, entr\u00f2 nell'Accademia dei Guardiamarina di Cadice, dove dimostr\u00f2 un grande talento per la matematica e partecip\u00f2 ad azioni militari, come la presa di Orano. Appena diplomato, fu scelto insieme a un altro giovane marinaio, Antonio de Ulloa, come membro della spedizione geodetica con cui l'Accademia delle Scienze di Parigi voleva determinare la forma della Terra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si trattava di decidere tra le due teorie rivali della gravitazione proposte da Cartesio e Newton. La prima attribuiva la gravit\u00e0 all'effetto di vortici di materia sottile che riempivano lo spazio e prevedeva una Terra allungata dai poli, mentre la seconda la spiegava come un'azione a distanza che agisce attraverso il vuoto e sosteneva che la Terra sarebbe stata dilatata dall'equatore e appiattita dai poli.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La spedizione dur\u00f2 quasi dieci anni e conferm\u00f2 definitivamente la teoria di Newton. George John ne scrisse in un libro, <em>Osservazioni astronomiche e fisiche nei regni del Per\u00f9, <\/em>che lo port\u00f2 alla nomina a membro dell'Accademia delle Scienze di Parigi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per il resto della sua vita Jorge Juan lavor\u00f2 instancabilmente al servizio della corona spagnola: introdusse nuove tecniche di costruzione navale, modernizz\u00f2 cantieri, miniere e arsenali, riform\u00f2 l'insegnamento dell'Accademia dei guardiamarina, fond\u00f2 il Reale Osservatorio Astronomico di Madrid. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Infine, in tarda et\u00e0, scrisse il miglior trattato di costruzione navale e di navigazione dell'epoca: la <em>Esame marittimo,<\/em> che fu studiato in tutta Europa, e per la prima volta applic\u00f2 la fisica newtoniana e il calcolo differenziale e integrale alla progettazione navale.<\/p>","protected":false},"excerpt":{"rendered":"<p>Jorge Juan y Santacilia (5 de enero de 1713 \u2013 21 de junio de 1773) fue un marino espa\u00f1ol, que destac\u00f3 como cient\u00edfico, ingeniero naval y servidor p\u00fablico. Qued\u00f3 hu\u00e9rfano a los tres a\u00f1os y su t\u00edo se hizo cargo de su educaci\u00f3n. Con s\u00f3lo 12 a\u00f1os lo envi\u00f3 a Malta, donde fue admitido como [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":38813,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[36,39],"tags":[1333],"class_list":["post-38806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","category-cultura","tag-cientificos-catolicos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cient\u00edficos cat\u00f3licos: Jorge Juan<\/title>\n<meta name=\"description\" content=\"Jorge Juan y Santacilia ha pasado a la historia por ser, entre otras cosas, el fundador el Real Observatorio Astron\u00f3mico de Madrid.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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