{"id":790,"date":"2022-11-20T22:49:05","date_gmt":"2022-11-20T20:49:05","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=790"},"modified":"2022-11-20T22:49:05","modified_gmt":"2022-11-20T20:49:05","slug":"quants-planetes-existeixen-a-lunivers","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/quants-planetes-existeixen-a-lunivers\/","title":{"rendered":"Quants planetes existeixen a l\u2019univers?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">La Terra forma part del sistema solar. L\u2019estrella d\u2019aquest sistema \u00e9s el Sol, i aquest est\u00e0 orbitat per 8 planetes (Mercuri, <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/venus-el-planeta-besso-de-la-terra\/\">Venus<\/a><\/strong>, La Terra, Mart, J\u00fapiter, Saturn, Ur\u00e0, i Nept\u00fa). L\u2019univers est\u00e0 format per un n\u00famero inimaginable de gal\u00e0xies, que contenen, cada una d\u2019elles, milers de milions d\u2019estrelles. Per\u00f2, quants planetes hi ha a l\u2019univers?<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Detecci\u00f3 d\u2019exoplanetes<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">S\u2019anomenen exoplanetes tots els planetes que es trobin fora del sistema solar. Al llarg de les \u00faltimes d\u00e8cades, les t\u00e8cniques de detecci\u00f3 d\u2019exoplanetes s\u2019han anat perfeccionant, fins al punt d\u2019enviar varis telescopis a l\u2019espai amb l\u2019objectiu de detectar planetes al voltant d\u2019altres estrelles.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">El telescopi Kepler, que va funcionar des del 2009 fins al 2018, va observar una \u00e0rea de l\u2019espai contenint unes 150.000 estrelles, en busca de nous planetes. En total, va arribar a detectar m\u00e9s de 2700 exoplanetes, i 2000 m\u00e9s per confirmar.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Gr\u00e0cies a aquests resultats, els astr\u00f2noms han estat capa\u00e7os d\u2019obtenir un n\u00famero aproximat de planetes per estrella, que avui en dia \u00e9s d\u2019aproximadament un planeta per estrella.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Per suposat, hi ha estrelles que no tenen cap planeta en \u00f2rbita, i altres que en tenen molts, com per exemple el Sol.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>El n\u00famero de planetes a l\u2019univers<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">El sistema solar forma part d\u2019una gal\u00e0xia anomenada Via L\u00e0ctia, que forma part d\u2019un grup m\u00e9s gran de gal\u00e0xies anomenat Grup Local. Aquestes estructures gal\u00e0ctiques es van fent m\u00e9s grans fins arribar al superc\u00famuls, que poden contenir milers de milions de gal\u00e0xies.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">En total, es creu que a l\u2019univers existeixen aproximadament 2 bilions de gal\u00e0xies, formades, cada una d\u2019elles, per desenes de milers de milions d\u2019estrelles, i cadascuna d\u2019aquestes estrelles amb algun planeta orbitant-la. Per tant, podem veure que el n\u00famero de planetes al nostre univers \u00e9s extraordin\u00e0riament elevat.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">En total, es calcula que a l\u2019univers <strong>podrien existir m\u00e9s de 20.000 trilions de planetes<\/strong> (un 2 seguit de 23 zeros).<\/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\/com-es-formen-els-planetes\/\">Com es formen els planetes?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/que-es-la-zona-habitable-duna-estrella\/\">Qu\u00e8 \u00e9s la zona habitable d\u2019una estrella?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/els-tipus-de-planetes-que-hi-ha-al-sistema-solar-i-les-seves-caracteristiques\/\">Els tipus de planetes que hi ha al sistema solar i les seves caracter\u00edstiques<\/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><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>La Terra forma part del sistema solar. L\u2019estrella d\u2019aquest sistema \u00e9s el Sol, i aquest est\u00e0 orbitat per 8 planetes (Mercuri, Venus, La Terra, Mart,<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/quants-planetes-existeixen-a-lunivers\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":792,"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":[658,6],"tags":[367,31,667,664,9,666,231,665,55],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/11\/Planetes_Univers.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":821,"url":"https:\/\/www.cosmoespai.com\/cat\/quants-exoplanetes-hem-detectat-fins-avui\/","url_meta":{"origin":790,"position":0},"title":"Quants exoplanetes hem detectat fins avui?","author":"Ferran","date":"24 de desembre de 2022","format":false,"excerpt":"Un exoplaneta (tamb\u00e9 anomenat planeta extrasolar) \u00e9s un planeta que es troba m\u00e9s enll\u00e0 del sistema solar. A causa de les grans dist\u00e0ncies que ens separen de la resta d\u2019estrelles, i conseg\u00fcentment d\u2019altres planetes, fa que la detecci\u00f3 de planetes extrasolars sigui molt complicada. Per aquest motiu, la gran majoria\u2026","rel":"","context":"A &quot;Planetes&quot;","block_context":{"text":"Planetes","link":"https:\/\/www.cosmoespai.com\/cat\/category\/planetes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Planetes_Descoberts.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Planetes_Descoberts.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Planetes_Descoberts.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Planetes_Descoberts.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":795,"url":"https:\/\/www.cosmoespai.com\/cat\/el-metode-del-transit-la-millor-manera-per-descobrir-exoplanetes\/","url_meta":{"origin":790,"position":1},"title":"El m\u00e8tode del tr\u00e0nsit: la millor manera per descobrir exoplanetes","author":"Ferran","date":"27 de novembre de 2022","format":false,"excerpt":"La cerca de planetes m\u00e9s enll\u00e0 del sistema solar va comen\u00e7ar fa tan sols unes d\u00e8cades, i al novembre de 2022, el n\u00famero d\u2019exoplanetes descoberts (planetes que es troben fora del sistema solar) ja supera els 5.250. Avui en dia s\u2019utilitzen v\u00e0ries t\u00e8cniques per poder detectar exoplanetes. La m\u00e9s utilitzada\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\/11\/Transit_Exoplanetes.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/11\/Transit_Exoplanetes.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/11\/Transit_Exoplanetes.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/11\/Transit_Exoplanetes.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":816,"url":"https:\/\/www.cosmoespai.com\/cat\/que-es-el-metode-de-deteccio-directa-dexoplanetes\/","url_meta":{"origin":790,"position":2},"title":"Qu\u00e8 \u00e9s el m\u00e8tode de detecci\u00f3 directa d\u2019exoplanetes?","author":"Ferran","date":"19 de desembre de 2022","format":false,"excerpt":"Dels diversos m\u00e8todes que existeixen per observar exoplanetes, la detecci\u00f3 directa pot semblar que sigui el sistema m\u00e9s senzill, per\u00f2, en realitat, \u00e9s el m\u00e9s complicat des del punt de vista t\u00e8cnic. Per aquest motiu, els m\u00e8todes m\u00e9s utilitzats per la detecci\u00f3 de planetes extrasolars s\u00f3n m\u00e8todes de detecci\u00f3 indirectes,\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\/12\/DeteccioDirecta_Exoplanetes.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/DeteccioDirecta_Exoplanetes.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/DeteccioDirecta_Exoplanetes.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/DeteccioDirecta_Exoplanetes.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":807,"url":"https:\/\/www.cosmoespai.com\/cat\/deteccio-dexoplanetes-el-metode-de-la-velocitat-radial\/","url_meta":{"origin":790,"position":3},"title":"Detecci\u00f3 d\u2019exoplanetes: el m\u00e8tode de la velocitat radial","author":"Ferran","date":"6 de desembre de 2022","format":false,"excerpt":"La detecci\u00f3 d\u2019exoplanetes s\u2019ha desenvolupat en gran mesura durant les \u00faltimes d\u00e8cades. Des de la primera detecci\u00f3 d\u2019un exoplaneta al 1994, s\u2019han anat posant en pr\u00e0ctica diversos m\u00e8todes per descobrir exoplanetes. A causa de les enormes dificultats per observar planetes directament, quasi totes les deteccions d\u2019exoplanetes s\u2019han efectuat mitjan\u00e7ant m\u00e8todes\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\/12\/Velocitat_Radialexoplanetes.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Velocitat_Radialexoplanetes.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Velocitat_Radialexoplanetes.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Velocitat_Radialexoplanetes.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":801,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-detecten-les-atmosferes-dels-exoplanetes\/","url_meta":{"origin":790,"position":4},"title":"Com es detecten les atmosferes dels exoplanetes?","author":"Ferran","date":"4 de desembre de 2022","format":false,"excerpt":"Els m\u00e8todes per detectar exoplanetes (planetes que es troben fora del sistema solar) s\u00f3n varis, i la t\u00e8cnica utilitzada varia enormement en cada cas. Gr\u00e0cies a noves tecnologies s\u2019han detectat fins a dia d\u2019avui m\u00e9s de 5.200 exoplanetes. No obstant, el nombre de planetes dels quals hem pogut analitzar la\u2026","rel":"","context":"A &quot;Planetes&quot;","block_context":{"text":"Planetes","link":"https:\/\/www.cosmoespai.com\/cat\/category\/planetes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Deteccio_Atmosfera.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Deteccio_Atmosfera.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Deteccio_Atmosfera.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/12\/Deteccio_Atmosfera.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":228,"url":"https:\/\/www.cosmoespai.com\/cat\/un-planeta-que-esta-format-per-diamants\/","url_meta":{"origin":790,"position":5},"title":"Un planeta que est\u00e0 format per diamants","author":"Ferran","date":"25 de desembre de 2020","format":false,"excerpt":"El descobriment d\u2019exoplanetes est\u00e0 molt desenvolupat es comparaci\u00f3 de fa uns anys. Cada dia es descobreixen nous exoplanetes orbitant estrelles molt llunyanes a la nostra, i que no s\u2019assemblen gaire als que orbiten el Sol. Tot i aix\u00ed, al 2011, un equip de cient\u00edfics va descobrir un planeta format principalment\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\/Planeta_Diamants.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\/Planeta_Diamants.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/12\/Planeta_Diamants.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/12\/Planeta_Diamants.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/790"}],"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=790"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/790\/revisions"}],"predecessor-version":[{"id":793,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/790\/revisions\/793"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/792"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}