{"id":647,"date":"2022-06-10T21:30:24","date_gmt":"2022-06-10T19:30:24","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=647"},"modified":"2022-06-10T21:30:24","modified_gmt":"2022-06-10T19:30:24","slug":"on-se-situa-el-limit-del-sistema-solar","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/on-se-situa-el-limit-del-sistema-solar\/","title":{"rendered":"On se situa el l\u00edmit del sistema solar?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">El nostre sistema solar est\u00e0 compost pel Sol, 8 planetes que l\u2019orbiten, molts m\u00e9s planetes nans, i dos cinturons d\u2019asteroides. Com passa amb moltes preguntes en l\u2019\u00e0mbit de la ci\u00e8ncia, la resposta \u00e9s m\u00e9s complicada del que sembla, i no sempre hi ha una resposta \u00fanica.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>M\u00e9s enll\u00e0 de la influ\u00e8ncia magn\u00e8tica del sol: l\u2019heliopausa<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">La radiaci\u00f3 que emet el Sol, coneguda com vent solar, compost per plasma i material ionitzat, viatja a trav\u00e9s de l\u2019espai a una velocitat gegantesca. Aquesta radiaci\u00f3 desapareix aproximadament a uns 17 000 milions de kil\u00f2metres de la Terra. L\u2019interior d\u2019aquesta zona es coneix com heliosfera, i, dins d\u2019ella, es considera que un objecte es troba sota la influ\u00e8ncia magn\u00e8tica del Sol.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">El l\u00edmit on s\u2019acaba l\u2019heliosfera es coneix com heliopausa. La NASA considera que les sondes que creuin l\u2019heliopausa es troben en el medi interestel\u00b7lar. Per exemple, la sonda Voyager 1, l\u2019objecte m\u00e9s lluny\u00e0 creat per l\u2019home, va creuar aquesta franja al 2013, i molts medis de comunicaci\u00f3 van afirmar que havia sortit del sistema solar.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">No obstant, aix\u00f2 no \u00e9s del tot exacte, ja que, m\u00e9s enll\u00e0 de l\u2019\u00f2rbita de Nept\u00fa i del cintur\u00f3 de Kuiper (un cintur\u00f3 format per una enorme quantitat d\u2019asteroides i cometes) es troba el n\u00favol d\u2019Oort. Aquest \u00abn\u00favol\u00bb \u00e9s una esfera que envolta completament el sistema solar, formada per bilions d\u2019asteroides, cometes i altres cossos. S\u2019est\u00e9n fins a uns dos anys llum de dist\u00e0ncia.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>L\u2019atracci\u00f3 gravitat\u00f2ria del Sol<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">Aquests bilions de cossos que formen el n\u00favol d\u2019Oort orbiten el Sol, i, per tant, estan subjectes a la seva atracci\u00f3 gravitat\u00f2ria. La sonda Voyager encara tardar\u00e0 uns 300 anys en arribar al comen\u00e7ament del n\u00favol d\u2019Oort, i passaran uns 30 000 anys m\u00e9s fins que el travessi al complet.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Com veiem, aquests objectes encara es troben sota la influ\u00e8ncia de la gravetat del Sol, i podr\u00edem considerar que el n\u00favol d\u2019Oort forma part del sistema solar.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Per tant, d\u2019una banda podem afirmar que el l\u00edmit del sistema solar es troba a l\u2019heliopausa, i, de l\u2019altra, que el sistema solar continua fins al final del n\u00favol d\u2019Oort. Tot dep\u00e8n del que vulguem tenir en compte, i, en conseq\u00fc\u00e8ncia, no hi ha una resposta \u00fanica.<\/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\/quina-edat-te-la-terra\/\">Quina edat t\u00e9 la Terra?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/qui-va-mesurar-la-circumferencia-de-la-terra-per-primer-cop\/\">Qui va mesurar la circumfer\u00e8ncia de la Terra per primer cop?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/on-comenca-lespai\/\">On comen\u00e7a l\u2019espai?<\/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><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>El nostre sistema solar est\u00e0 compost pel Sol, 8 planetes que l\u2019orbiten, molts m\u00e9s planetes nans, i dos cinturons d\u2019asteroides. Com passa amb moltes preguntes<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/on-se-situa-el-limit-del-sistema-solar\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":649,"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":[1,3],"tags":[20,381,579,582,581,580,585,481,45,583,382,584],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Final_SistemaSolar.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":676,"url":"https:\/\/www.cosmoespai.com\/cat\/de-que-esta-compost-el-vent-solar\/","url_meta":{"origin":647,"position":0},"title":"De qu\u00e8 est\u00e0 compost el vent solar?","author":"Ferran","date":"10 de juliol de 2022","format":false,"excerpt":"El vent solar \u00e9s un continu corrent de part\u00edcules molt energ\u00e8tiques provinent, com el seu nom indica, de la nostra estrella. A la Terra, el vent solar \u00e9s el responsable de la formaci\u00f3 de les aurores boreals, per\u00f2 pot tenir efectes perjudicials en els sat\u00e8l\u00b7lits que orbiten la Terra. La\u2026","rel":"","context":"A &quot;Sol&quot;","block_context":{"text":"Sol","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/sol\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Composici\u00f3_VentSolar.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Composici\u00f3_VentSolar.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Composici\u00f3_VentSolar.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Composici\u00f3_VentSolar.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":664,"url":"https:\/\/www.cosmoespai.com\/cat\/la-formacio-de-les-aurores-boreals-que-son\/","url_meta":{"origin":647,"position":1},"title":"La formaci\u00f3 de les aurores boreals. Qu\u00e8 s\u00f3n?","author":"Ferran","date":"26 de juny de 2022","format":false,"excerpt":"La humanitat sempre ha estat fascinada per les aurores boreals, uns incre\u00efbles espectacles de llum que il\u00b7luminen amb els seus colors el cel nocturn. Aquests esdeveniments tenen lloc fonamentalment als pols de la Terra: al Pol Nord s'anomenen aurores boreals, i quan tenen lloc al Pol Sud s\u2019anomenen aurores australs.\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\/06\/Aurores_Boreals.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Aurores_Boreals.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Aurores_Boreals.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Aurores_Boreals.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":249,"url":"https:\/\/www.cosmoespai.com\/cat\/els-tipus-de-planetes-que-hi-ha-al-sistema-solar-i-les-seves-caracteristiques\/","url_meta":{"origin":647,"position":2},"title":"Els tipus de planetes que hi ha al sistema solar i les seves caracter\u00edstiques","author":"Ferran","date":"22 de gener de 2021","format":false,"excerpt":"El sistema solar, a les afores del bra\u00e7 d\u2019Ori\u00f3 de la Via L\u00e0ctia, la nostra gal\u00e0xia, \u00e9s el sistema estel\u00b7lar on hi ha la Terra. Al sistema solar hi ha 8 planetes principals, els quals es divideixen en dos tipus diferents de planetes, existint un tercer tipus de diferents caracter\u00edstiques\u2026","rel":"","context":"A &quot;Sistema Solar&quot;","block_context":{"text":"Sistema Solar","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/01\/Tipus_Planetes.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/01\/Tipus_Planetes.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/01\/Tipus_Planetes.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/01\/Tipus_Planetes.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":409,"url":"https:\/\/www.cosmoespai.com\/cat\/es-possible-la-vida-al-voltant-de-nanes-vermelles\/","url_meta":{"origin":647,"position":3},"title":"\u00c9s possible la vida al voltant de nanes vermelles?","author":"Ferran","date":"23 de juliol de 2021","format":false,"excerpt":"El nostre univers est\u00e0 poblat per molts tipus d\u2019estrelles. Cada tipus d\u2019estrella t\u00e9 un color diferent, i la seva vida varia des d\u2019uns quants milions d\u2019anys fins a bilions o trilions d\u2019anys. Per tant, el millor lloc on buscar vida seria al voltant de les estrelles m\u00e9s longeves, on la\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\/2021\/07\/Vida_NanesVermelles.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/07\/Vida_NanesVermelles.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/07\/Vida_NanesVermelles.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/07\/Vida_NanesVermelles.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":317,"url":"https:\/\/www.cosmoespai.com\/cat\/quan-dura-un-dia-als-planetes-exteriors\/","url_meta":{"origin":647,"position":4},"title":"Quan dura un dia als planetes exteriors?","author":"Ferran","date":"3 de maig de 2021","format":false,"excerpt":"No tots els dies, als planetes del sistema solar, tenen la mateixa duraci\u00f3, ja que un dia correspon al temps que tarda un planeta en fer un gir complet sobre el seu eix. Tots els planetes tenen una duraci\u00f3 del dia diferent a la nostra, i la duraci\u00f3 del seu\u2026","rel":"","context":"A &quot;Sistema Solar&quot;","block_context":{"text":"Sistema Solar","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Duraci\u00f3Dies_Planetes_Exteriors.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Duraci\u00f3Dies_Planetes_Exteriors.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Duraci\u00f3Dies_Planetes_Exteriors.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Duraci\u00f3Dies_Planetes_Exteriors.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":687,"url":"https:\/\/www.cosmoespai.com\/cat\/els-efectes-del-vent-solar-a-la-terra\/","url_meta":{"origin":647,"position":5},"title":"Els efectes del vent solar a la Terra","author":"Ferran","date":"16 de juliol de 2022","format":false,"excerpt":"El vent solar \u00e9s un flux continu de part\u00edcules, majorit\u00e0riament protons i electrons amb molta energia, que prov\u00e9 de la capa m\u00e9s superficial del Sol, la corona. Aquestes part\u00edcules viatgen a una velocitat d\u2019entre 400 i 900 kil\u00f2metres per segon, i afecten a tots els cossos del sistema solar. La\u2026","rel":"","context":"A &quot;Sol&quot;","block_context":{"text":"Sol","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/sol\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Efectes_VentSolar.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Efectes_VentSolar.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Efectes_VentSolar.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/07\/Efectes_VentSolar.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/647"}],"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=647"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/647\/revisions"}],"predecessor-version":[{"id":650,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/647\/revisions\/650"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/649"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}