{"id":759,"date":"2022-10-09T21:35:23","date_gmt":"2022-10-09T19:35:23","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=759"},"modified":"2022-10-09T21:35:23","modified_gmt":"2022-10-09T19:35:23","slug":"quina-es-lestrella-mes-propera-a-la-terra","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/quina-es-lestrella-mes-propera-a-la-terra\/","title":{"rendered":"Quina \u00e9s l\u2019estrella m\u00e9s propera a la Terra?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">\u00d2bviament, l\u2019estrella m\u00e9s propera a la Terra \u00e9s l\u2019estrella central del nostre sistema solar: el Sol. La nostra estrella pertany a la categoria de <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/quins-tipus-destels-hi-ha\/\" target=\"_blank\" rel=\"noreferrer noopener\">nana groga<\/a><\/strong>, i existeix des de fa 5.000 milions d\u2019anys. Sense el Sol no existiria vida a la Terra. L\u2019estrella es troba a 150 milions de kil\u00f2metres de la Terra, que corresponen a una dist\u00e0ncia de 8,5 minuts llum (la llum tarda 8 minuts i 30 segons en rec\u00f3rrer la dist\u00e0ncia que separa la Terra del Sol).<\/p>\n\n\n\n<p class=\"has-text-align-justify\">No obstant, a part del Sol, hi ha moltes altres estrelles que es troben a prop (en termes astron\u00f2mics) del nostre planeta. La m\u00e9s propera de totes elles \u00e9s Proxima Centauri, una<strong> <a href=\"http:\/\/www.cosmoespai.com\/cat\/quins-tipus-destels-hi-ha\/\" target=\"_blank\" rel=\"noreferrer noopener\">nana vermella<\/a><\/strong> que pertany al sistema estel\u00b7lar d\u2019Alfa Centauri.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Proxima Centauri i el seu sistema estel\u00b7lar<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">Com he dit, a part del Sol, l\u2019estrella m\u00e9s propera a la Terra \u00e9s Proxima Centauri, anomenada a vegades Alfa Centauri C. Aquesta estrella va ser descoberta l\u2019any 1915 per l\u2019astr\u00f2nom escoc\u00e8s Robert Innes.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Proxima Centauri es troba a una dist\u00e0ncia de 4,24 anys llum (40,1 bilions de kil\u00f2metres) de nosaltres, una dist\u00e0ncia molt curta en termes astron\u00f2mics. Aix\u00f2 vol dir que la seva llum tarda 4,24 anys en arribar-nos, pel que, en realitat, estem veient l\u2019estrella tal com era en el passat (aix\u00f2 passa amb tots els cossos de l\u2019univers).<\/p>\n\n\n\n<p class=\"has-text-align-justify\">A m\u00e9s, des del 2016 sabem que Proxima Centauri t\u00e9 un planeta, segurament roc\u00f3s, que l\u2019orbita. Segons el grup de cient\u00edfics que el van descobrir, el planeta podria gaudir de temperatures moderades.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Finalment, Proxima Centauri pertany a un sistema de 3 estrelles que orbiten les unes al voltant de les altres. Les dues estrelles principals d\u2019aquest sistema, Alfa Centauri A i Alfa Centauri B, es troben a 4,37 anys llum de la Terra. La tercera estrella \u00e9s la que es troba m\u00e9s a prop de la Terra: Proxima Centauri.<\/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\/es-possible-la-vida-al-voltant-de-nanes-vermelles\/\">\u00c9s possible la vida al voltant de nanes vermelles?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quins-tipus-destels-hi-ha\/\">Quins tipus d\u2019estels hi ha?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/per-que-les-estrelles-no-tenen-totes-el-mateix-color\/\">Per qu\u00e8 les estrelles no tenen totes el mateix color?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/com-neixen-les-estrelles\/\">Com neixen les estrelles?<\/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>\u00d2bviament, l\u2019estrella m\u00e9s propera a la Terra \u00e9s l\u2019estrella central del nostre sistema solar: el Sol. La nostra estrella pertany a la categoria de nana<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/quina-es-lestrella-mes-propera-a-la-terra\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":761,"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":[5,1],"tags":[642,512,283,643,31,644,645,45,93],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Estrella_PropTerra.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":763,"url":"https:\/\/www.cosmoespai.com\/cat\/quan-tardariem-en-arribar-a-lestrella-mes-propera\/","url_meta":{"origin":759,"position":0},"title":"Quan tardar\u00edem en arribar a l\u2019estrella m\u00e9s propera?","author":"Ferran","date":"15 d'octubre de 2022","format":false,"excerpt":"Deixant de banda el Sol, l\u2019estrella m\u00e9s propera a la Terra \u00e9s Proxima Centauri. Aquesta estrella pertany a un sistema estel\u00b7lar anomenat Alfa Centauri, format per 3 estrelles que orbiten les unes al voltant de les altres. De totes elles, Proxima Centauri \u00e9s la m\u00e9s propera a la Terra, a\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\/2022\/10\/Viatjar_EstrellaPropera.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\/Viatjar_EstrellaPropera.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Viatjar_EstrellaPropera.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/10\/Viatjar_EstrellaPropera.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":293,"url":"https:\/\/www.cosmoespai.com\/cat\/les-unitats-de-mesura-que-fem-servir-en-astronomia\/","url_meta":{"origin":759,"position":1},"title":"Les unitats de mesura que fem servir en astronomia","author":"Ferran","date":"2 d'abril de 2021","format":false,"excerpt":"Les dist\u00e0ncies a l\u2019univers s\u00f3n tan grans, que ni tan sols les mesures m\u00e9s grans que utilitzem al Sistema Internacional, ens serveixen per a poder expressar les dist\u00e0ncies amb n\u00fameros que siguin raonablement manejables. Per poder fer-nos una idea d\u2019aquestes enormes dist\u00e0ncies hem de rec\u00f3rrer a noves mesures. L\u2019espai \u00e9s\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\/2021\/03\/Dist\u00e0ncies_Univers.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Dist\u00e0ncies_Univers.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Dist\u00e0ncies_Univers.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Dist\u00e0ncies_Univers.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":214,"url":"https:\/\/www.cosmoespai.com\/cat\/quantes-estrelles-hi-ha-a-la-via-lactia\/","url_meta":{"origin":759,"position":2},"title":"Quantes estrelles hi ha a la Via L\u00e0ctia?","author":"Ferran","date":"28 de novembre de 2020","format":false,"excerpt":"La Via L\u00e0ctia \u00e9s la nostra gal\u00e0xia, on es troba el sistema solar, que est\u00e0 format per 8 planetes i les seves llunes. Tot i aix\u00ed, el sistema solar nom\u00e9s est\u00e0 format per una estrella, de petita mida, entre milers de milions d\u2019altres estrelles que hi ha a la Via\u2026","rel":"","context":"A &quot;Gal\u00e0xies&quot;","block_context":{"text":"Gal\u00e0xies","link":"https:\/\/www.cosmoespai.com\/cat\/category\/galaxies\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/11\/Estrelles_Via_L\u00e0ctia.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/11\/Estrelles_Via_L\u00e0ctia.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/11\/Estrelles_Via_L\u00e0ctia.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/11\/Estrelles_Via_L\u00e0ctia.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":759,"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":60,"url":"https:\/\/www.cosmoespai.com\/cat\/quins-tipus-destels-hi-ha\/","url_meta":{"origin":759,"position":4},"title":"Quins tipus d\u2019estels hi ha?","author":"Ferran","date":"7 de maig de 2020","format":false,"excerpt":"Els estels a l\u2019univers es classifiquen en diferents tipus, des de supergegants fins a nans. Nans vermells Els estels m\u00e9s nombrosos a l\u2019univers s\u00f3n els nans vermells, que representen el 80% d\u2019ells, i, com el seu nom indica, s\u00f3n vermells, aix\u00ed com els m\u00e9s petits de tots. Aquests estels, malgrat\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\/Tipos_Estrelles.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\/Tipos_Estrelles.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Tipos_Estrelles.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/05\/Tipos_Estrelles.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":225,"url":"https:\/\/www.cosmoespai.com\/cat\/j1407b-un-planeta-que-te-uns-anells-200-vegades-mes-grans-que-els-de-saturn\/","url_meta":{"origin":759,"position":5},"title":"J1407b, un planeta que t\u00e9 uns anells 200 vegades m\u00e9s grans que els de Saturn","author":"Ferran","date":"18 de desembre de 2020","format":false,"excerpt":"Tos hem sentit a parlar dels anells de Saturn, que s\u00f3n els m\u00e9s grans del sistema solar, i que es poden observar f\u00e0cilment mitjan\u00e7ant un telescopi des de la Terra. No obstant, al 2015 es va descobrir el primer planeta m\u00e9s enll\u00e0 del sistema solar en posseir anells: J1407b. J1407b\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\/12\/Anells_J1407b.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/12\/Anells_J1407b.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/12\/Anells_J1407b.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/12\/Anells_J1407b.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/759"}],"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=759"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/759\/revisions"}],"predecessor-version":[{"id":762,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/759\/revisions\/762"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/761"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}