{"id":939,"date":"2023-06-11T23:44:56","date_gmt":"2023-06-11T21:44:56","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=939"},"modified":"2023-06-11T23:44:56","modified_gmt":"2023-06-11T21:44:56","slug":"per-que-els-centres-de-les-galaxies-contenen-forats-negres","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/per-que-els-centres-de-les-galaxies-contenen-forats-negres\/","title":{"rendered":"Per qu\u00e8 els centres de les gal\u00e0xies contenen forats negres?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">Des dels anys 60 se sap que la majoria de les gal\u00e0xies contenen un forat negre al seu centre. Aquests forats negres tenen masses de l\u2019ordre de milions de vegades la massa del Sol, i s\u2019anomenen forats negres supermassius.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Els primers forats negres d\u2019aquest tipus es van descobrir gr\u00e0cies als qu\u00e0sars. Aquests cossos s\u00f3n nuclis de gal\u00e0xies molt llunyanes que emeten tanta llum, que l\u2019\u00fanica manera d\u2019explicar tal font d\u2019energia \u00e9s l\u2019exist\u00e8ncia de forats negres absorbint ingents quantitats de mat\u00e8ria.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Des de llavors, estudis d\u2019\u00f2rbites estel\u00b7lars han mostrat que fins i tot en gal\u00e0xies relativament tranquil\u00b7les com la nostra Via L\u00e0ctia, on no hi ha molta activitat, resideixen forats negres de milions de vegades la massa del Sol. Per exemple, el forat negre del nostre centre gal\u00e0ctic, a uns 26.000 anys llum, s\u2019anomena <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/sagitari-a-el-forat-negre-del-centre-de-la-via-lactia\/\" data-type=\"post\" data-id=\"871\" target=\"_blank\" rel=\"noreferrer noopener\">Sagitari A*<\/a><\/strong>, i la seva massa equival a 4 milions de vegades la del Sol.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Tot i aix\u00f2, l\u2019origen de tots aquests forats negres supermassius segueix sense estar clar. Una de les possibilitats \u00e9s que es van crear en el col\u00b7lapse gravitatori d\u2019enormes n\u00favols de gas, a partir dels quals tamb\u00e9 es van formar les gal\u00e0xies.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Tamb\u00e9 \u00e9s possible que provinguin de la fusi\u00f3 de molts forats negres de mides inferiors. Una altra explicaci\u00f3 \u00e9s que simplement un forat negre hagi anat creixent al llarg de milers de milions d\u2019anys, absorbint estrelles i altres cossos celestes que l\u2019orbiten.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Entrades Similars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/sagitari-a-el-forat-negre-del-centre-de-la-via-lactia\/\">Sagitari A*: el forat negre del centre de la Via L\u00e0ctia<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quantes-estrelles-hi-ha-a-la-via-lactia\/\">Quantes estrelles hi ha a la Via L\u00e0ctia?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-formacio-duna-galaxia-com-te-lloc-aquest-proces\/\">La formaci\u00f3 d\u2019una gal\u00e0xia. Com t\u00e9 lloc aquest proc\u00e9s?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-nostra-galaxia-la-via-lactia\/\">La nostra gal\u00e0xia: la Via L\u00e0ctia<\/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>Des dels anys 60 se sap que la majoria de les gal\u00e0xies contenen un forat negre al seu centre. Aquests forats negres tenen masses de<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-els-centres-de-les-galaxies-contenen-forats-negres\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":941,"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":[8,1,6],"tags":[384,654,71,194,10,230,298,657,55],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/06\/PerQue_GalaxiesTenenForatsNegres.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":768,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-formen-els-forats-negres\/","url_meta":{"origin":939,"position":0},"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":871,"url":"https:\/\/www.cosmoespai.com\/cat\/sagitari-a-el-forat-negre-del-centre-de-la-via-lactia\/","url_meta":{"origin":939,"position":1},"title":"Sagitari A*: el forat negre del centre de la Via L\u00e0ctia","author":"Ferran","date":"12 de mar\u00e7 de 2023","format":false,"excerpt":"Sagitari A*, pronunciat \u00abSagitari A estrella\u00bb i abreviat Sgr A*, \u00e9s un forat negre supermassiu que es troba al centre de la nostra gal\u00e0xia, la Via L\u00e0ctia. \u00c9s una font d\u2019ones r\u00e0dio molt compacta i brillant. Durant molt de temps s\u2019havia suposat que es tractava d\u2019un forat negre, per\u00f2 aix\u00f2\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\/03\/SagitariA.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/SagitariA.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/SagitariA.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/SagitariA.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":772,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-detecten-els-forats-negres\/","url_meta":{"origin":939,"position":2},"title":"Com es detecten els forats negres?","author":"Ferran","date":"27 d'octubre de 2022","format":false,"excerpt":"Els forats negres s\u00f3n uns dels cossos m\u00e9s intrigants del cosmos, ja que s\u00f3n llocs a l\u2019espai amb una gravetat tan intensa que ni tan sols la llum en pot escapar. Normalment es formen quan una estrella supermassiva col\u00b7lapsa sobre ella mateixa. Aix\u00f2 dona lloc a forats negres de massa\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\/Deteccio_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\/Deteccio_ForatsNegres.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Deteccio_ForatsNegres.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Deteccio_ForatsNegres.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":862,"url":"https:\/\/www.cosmoespai.com\/cat\/que-es-lhoritzo-desdeveniments-dun-forat-negre\/","url_meta":{"origin":939,"position":3},"title":"Qu\u00e8 \u00e9s l\u2019horitz\u00f3 d\u2019esdeveniments d\u2019un forat negre?","author":"Ferran","date":"26 de febrer de 2023","format":false,"excerpt":"Un dels termes que m\u00e9s es mencionen al parlar de forats negres \u00e9s l\u2019horitz\u00f3 d\u2019esdeveniments. Aquesta \u00e9s una de les parts m\u00e9s importants que formen un forat negre, i representa el l\u00edmit a partir del qual la gravetat es torna tan intensa que esdev\u00e9 impossible escapar del forat negre, fins\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\/02\/Horitz\u00f3_Esdeveniments.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/02\/Horitz\u00f3_Esdeveniments.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/02\/Horitz\u00f3_Esdeveniments.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/02\/Horitz\u00f3_Esdeveniments.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":876,"url":"https:\/\/www.cosmoespai.com\/cat\/la-radiacio-hawking-i-els-forats-negres\/","url_meta":{"origin":939,"position":4},"title":"La radiaci\u00f3 Hawking i els forats negres","author":"Ferran","date":"19 de mar\u00e7 de 2023","format":false,"excerpt":"Stephen Hawking va ser un dels f\u00edsics te\u00f2rics m\u00e9s importants de l\u2019\u00faltim segle. Un dels descobriments m\u00e9s importants que va realitzar durant la seva carrera va ser l\u2019anomenada radiaci\u00f3 Hawking. Aquesta radiaci\u00f3 \u00e9s la responsable de que els forats negres emetin energia, i, en conseq\u00fc\u00e8ncia, s\u2019evaporin de mica en mica.\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\/03\/RadiacioHawking.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/RadiacioHawking.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/RadiacioHawking.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/03\/RadiacioHawking.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":895,"url":"https:\/\/www.cosmoespai.com\/cat\/existeixen-els-forats-negres-no-rotatoris\/","url_meta":{"origin":939,"position":5},"title":"Existeixen els forats negres no rotatoris?","author":"Ferran","date":"15 d'abril de 2023","format":false,"excerpt":"Els forats negres s\u00f3n un dels cossos m\u00e9s fascinants i misteriosos de l\u2019univers. S\u00f3n regions de l\u2019espai amb una densitat tan elevada que ni tan sols la llum en pot escapar. Per molt que els forats negres semblin cossos molt complexos i diferents entre ells, la veritat \u00e9s 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\/2023\/04\/ForatsNegres_No_Rotatoris.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/04\/ForatsNegres_No_Rotatoris.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/04\/ForatsNegres_No_Rotatoris.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/04\/ForatsNegres_No_Rotatoris.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/939"}],"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=939"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/939\/revisions"}],"predecessor-version":[{"id":942,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/939\/revisions\/942"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/941"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=939"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=939"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=939"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}