{"id":593,"date":"2022-03-25T16:40:00","date_gmt":"2022-03-25T14:40:00","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=593"},"modified":"2022-03-24T22:10:05","modified_gmt":"2022-03-24T20:10:05","slug":"lorigen-de-lor-on-es-forma-aquest-material","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/lorigen-de-lor-on-es-forma-aquest-material\/","title":{"rendered":"L\u2019origen de l\u2019or: on es forma aquest material?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">L\u2019or \u00e9s un material molt valu\u00f3s, que \u00e9s utilitzat en una gran varietat d\u2019ind\u00fastries. A la Terra aquest metall s\u2019extreu de mines, trobant-se tamb\u00e9 (en petites quantitats) en alguns rius. No obstant, l\u2019or no ha aparegut del no res a la Terra. Aix\u00ed doncs, d\u2019on prov\u00e9 l\u2019or que existeix a la Terra?<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Explosions de supernova<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">Les estrelles aconsegueixen la seva energia al fusionar els elements que es troben al seu interior, i en aquest proc\u00e9s en formen de m\u00e9s pesants. Per exemple, les estrelles comencen a fusionar hidrogen, i el converteixen en heli (que llavors es torna a fusionar). No obstant, a l\u2019arribar al ferro, aquest proc\u00e9s ja no genera energia, sin\u00f3 que en consumeix. \u00c9s en aquest moment que l\u2019estrella col\u00b7lapsa sota el seu propi pes, i explota en forma de <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/supernoves\/\" target=\"_blank\" rel=\"noreferrer noopener\">supernova<\/a><\/strong> (que pot brillar m\u00e9s que una gal\u00e0xia sencera).<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Molts textos asseguren que \u00e9s en aquestes explosions quan es formen els elements m\u00e9s pesants, com l\u2019or o l\u2019urani. Malgrat aix\u00f2, les simulacions fetes de supernoves no mostren que es produeixin aquests materials. Aix\u00f2 va representar un problema, ja que les supernoves eren l\u2019\u00fanic fenomen en qu\u00e8 pod\u00edem pensar per produir aquests elements.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Col\u00b7lisions d\u2019estrelles de neutrons<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">Gr\u00e0cies a aquesta problem\u00e0tica plantejada, va sorgir una nova idea de com es podria formar l\u2019or (i altres elements m\u00e9s pesants) a l\u2019univers.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Les <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/459\/\" target=\"_blank\" rel=\"noreferrer noopener\">estrelles de neutrons<\/a><\/strong> s\u00f3n restes estel\u00b7lars d\u2019estrelles massives, estan formades principalment per neutrons, i tenen una enorme densitat (una cullerada de caf\u00e8 del material d\u2019aquests cossos podria pesar tant com el Mont Everest). Aquestes restes estel\u00b7lars poden trobar-se en parella, orbitant al voltant d\u2019un centre com\u00fa. En aquests casos, i despr\u00e9s de milers de milions d\u2019anys, les dues estrelles de neutrons poden col\u00b7lisionar brutalment.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Com mostren les simulacions fetes d\u2019aquests sistemes, en els instants de la col\u00b7lisi\u00f3 (i mitjan\u00e7ant un proc\u00e9s pel qual, a trav\u00e9s de bombardejar un element amb neutrons, aquest pot acabar per convertir-se en un element molt pesant) \u00e9s on es creen l\u2019or, l\u2019urani, i molts altres elements pesants que veiem a l\u2019univers.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Per tant, l\u2019or, plat\u00ed i molts altres materials que avui en dia s\u2019extreuen de les mines terrestres, es van formar, fa milers de milions d\u2019anys, en col\u00b7lisions d\u2019estrelles de neutrons.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>Entrades Similars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/459\/\">Qu\u00e8 s\u00f3n les estrelles de neutrons? Formaci\u00f3 i caracter\u00edstiques<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/supernoves\/\">Supernoves<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/com-sabem-que-lunivers-sesta-expandint\/\">Com sabem que l\u2019univers s\u2019est\u00e0 expandint?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-constant-cosmologica-el-major-error-deinstein\/\">La constant cosmol\u00f2gica: el major error d\u2019Einstein<\/a><\/p>\n\n\n\n<p><strong>Entrades Populars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/perque-la-lluna-nomes-ens-ensenya-una-cara\/\">Perqu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/stephenson-2-18-lestrella-mes-gran-coneguda-a-lunivers\/\">Stephenson 2-18, l\u2019estrella m\u00e9s gran coneguda a l\u2019univers<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/lexplotacio-minera-al-cinturo-dasteroides-una-font-de-recursos\/\">L\u2019explotaci\u00f3 minera al cintur\u00f3 d\u2019asteroides, una font de recursos<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-brossa-espacial-un-gran-problema\/\">La brossa espacial, un gran problema<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/com-es-van-extingir-els-dinosaures\/\">Com es van extingir els dinosaures?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/que-passaria-si-la-terra-deixes-de-rotar\/\">Qu\u00e8 passaria si la Terra deix\u00e9s de rotar?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-missio-a-venus-de-la-sonda-venus-express-per-la-esa\/\">La missi\u00f3 a Venus de la sonda Venus Express per la ESA<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quins-son-els-requisits-per-a-ser-un-planeta\/\">Quins s\u00f3n els requisits per a ser un planeta?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/perque-no-es-poden-sentir-sons-a-lespai\/\">Perqu\u00e8 no es poden sentir sons a l\u2019espai?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quina-mida-i-forma-tindrien-els-extraterrestres\/\">Quina mida i forma tindrien els extraterrestres?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/les-unitats-de-mesura-que-fem-servir-en-astronomia\/\">Les unitats de mesura que fem servir en astronomia<\/a><\/p>\n\n\n\n<p><strong>Entrades Recents:<\/strong><\/p>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/com-viatjar-al-futur-sense-violar-les-lleis-de-la-fisica\/\">Com Viatjar al Futur Sense Violar les Lleis de la F\u00edsica<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-la-gravetat\/\">Qu\u00e8 \u00e9s la gravetat?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-hi-ha-mes-materia-que-antimateria-a-lunivers\/\">Per qu\u00e8 hi ha m\u00e9s mat\u00e8ria que antimat\u00e8ria a l\u2019univers?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-lantimateria\/\">Qu\u00e8 \u00e9s l\u2019antimat\u00e8ria?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-els-centres-de-les-galaxies-contenen-forats-negres\/\">Per qu\u00e8 els centres de les gal\u00e0xies contenen forats negres?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>L\u2019or \u00e9s un material molt valu\u00f3s, que \u00e9s utilitzat en una gran varietat d\u2019ind\u00fastries. A la Terra aquest metall s\u2019extreu de mines, trobant-se tamb\u00e9 (en<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/lorigen-de-lor-on-es-forma-aquest-material\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":""},"categories":[1,6],"tags":[13,463,41,71,550,551,548,230,549,33],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/03\/Origen_Or.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":913,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-forma-lor\/","url_meta":{"origin":593,"position":0},"title":"Com es forma l\u2019or?","author":"Ferran","date":"14 de maig de 2023","format":false,"excerpt":"L\u2019or \u00e9s un metall preci\u00f3s molt valorat per la humanitat. Durant milers d\u2019anys els homes han buscat alguna manera de convertir materials en or, sense \u00e8xit. Gr\u00e0cies als aven\u00e7os cient\u00edfics i tecnol\u00f2gics, avui en dia coneixem els mecanismes pels quals es crea l\u2019or a l\u2019univers. L\u2019origen de l\u2019or Des de\u2026","rel":"","context":"A &quot;Univers&quot;","block_context":{"text":"Univers","link":"https:\/\/www.cosmoespai.com\/cat\/category\/univers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Or.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Or.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Or.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Or.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":918,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-formen-els-elements-de-la-taula-periodica\/","url_meta":{"origin":593,"position":1},"title":"Com es formen els elements de la taula peri\u00f2dica?","author":"Ferran","date":"21 de maig de 2023","format":false,"excerpt":"La taula peri\u00f2dica agrupa tots els elements coneguts de l\u2019univers. Dels 118 elements que existeixen a l\u2019univers, nom\u00e9s 94 es creen de manera natural. En aquest article veurem d\u2019on venen tots els elements de la taula peri\u00f2dica, des dels m\u00e9s lleugers fins als m\u00e9s pesats. La creaci\u00f3 dels primers elements\u2026","rel":"","context":"A &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/www.cosmoespai.com\/cat\/category\/general\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Elements_TaulaPeri\u00f2dica.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Elements_TaulaPeri\u00f2dica.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Elements_TaulaPeri\u00f2dica.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Formaci\u00f3_Elements_TaulaPeri\u00f2dica.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":74,"url":"https:\/\/www.cosmoespai.com\/cat\/quins-son-els-elements-originaris-del-big-bang\/","url_meta":{"origin":593,"position":2},"title":"Quins s\u00f3n els elements originaris del Big Bang?","author":"Ferran","date":"19 de maig de 2020","format":false,"excerpt":"El nostre univers i tot el que coneixem, es va formar despr\u00e9s del Big Bang, la gran expansi\u00f3 que va donar origen al nostre univers i tot el que veiem avui en dia, com poden ser les estrelles, gal\u00e0xies i planetes. El Big Bang es va produir fa uns 13.800\u2026","rel":"","context":"A &quot;Univers&quot;","block_context":{"text":"Univers","link":"https:\/\/www.cosmoespai.com\/cat\/category\/univers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Elements_BigBang.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Elements_BigBang.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Elements_BigBang.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Elements_BigBang.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":78,"url":"https:\/\/www.cosmoespai.com\/cat\/supernoves\/","url_meta":{"origin":593,"position":3},"title":"Supernoves","author":"Ferran","date":"26 de maig de 2020","format":false,"excerpt":"A l\u2019univers, les estrelles evolucionen de manera diferent segons el seu tipus. Algunes estrelles, com pot ser el nostre Sol, moriran de manera tranquil\u00b7la i sense explotar, acabaran els seus dies com a nanes blanques d\u2019uns 5.000 kil\u00f2metres de radi. Per\u00f2, altres, com les gegants blaves, acabaran en una explosi\u00f3\u2026","rel":"","context":"A &quot;Estrelles&quot;","block_context":{"text":"Estrelles","link":"https:\/\/www.cosmoespai.com\/cat\/category\/estrelles\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Supernova.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Supernova.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Supernova.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Supernova.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":768,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-formen-els-forats-negres\/","url_meta":{"origin":593,"position":4},"title":"Com es formen els forats negres?","author":"Ferran","date":"23 d'octubre de 2022","format":false,"excerpt":"Els forats negres s\u00f3n uns dels objectes m\u00e9s intrigants i misteriosos del cosmos. Aquests cossos s\u00f3n un lloc a l\u2019espai on la gravetat \u00e9s tan forta que ni tan sols la llum en pot escapar. Com que res pot anar m\u00e9s r\u00e0pid que la llum, aix\u00f2 vol dir que no\u2026","rel":"","context":"A &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/www.cosmoespai.com\/cat\/category\/general\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Formaci\u00f3_ForatsNegres.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Formaci\u00f3_ForatsNegres.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Formaci\u00f3_ForatsNegres.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Formaci\u00f3_ForatsNegres.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":908,"url":"https:\/\/www.cosmoespai.com\/cat\/com-produeixen-energia-les-estrelles\/","url_meta":{"origin":593,"position":5},"title":"Com produeixen energia les estrelles?","author":"Ferran","date":"7 de maig de 2023","format":false,"excerpt":"El Sol, la nostra estrella m\u00e9s propera, \u00e9s essencial per la pres\u00e8ncia de vida a la Terra, gr\u00e0cies a la llum i calor que emet. L\u2019univers est\u00e0 poblat per bilions d\u2019estrelles, que il\u00b7luminen el nostre cel de nit, i amb les quals podem obtenir unes imatges impressionants del cosmos. Per\u00f2,\u2026","rel":"","context":"A &quot;Estrelles&quot;","block_context":{"text":"Estrelles","link":"https:\/\/www.cosmoespai.com\/cat\/category\/estrelles\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Energia_Estrelles.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Energia_Estrelles.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Energia_Estrelles.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/05\/Energia_Estrelles.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/593"}],"collection":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/comments?post=593"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/593\/revisions"}],"predecessor-version":[{"id":596,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/593\/revisions\/596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/595"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}