{"id":163,"date":"2020-09-09T19:24:43","date_gmt":"2020-09-09T17:24:43","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=163"},"modified":"2020-09-09T19:24:43","modified_gmt":"2020-09-09T17:24:43","slug":"perque-la-lluna-nomes-ens-ensenya-una-cara","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/perque-la-lluna-nomes-ens-ensenya-una-cara\/","title":{"rendered":"Perqu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">La Lluna ens il\u00b7lumina durant la nit, i \u00e9s l\u2019origen de molts mites, per\u00f2 si la observem durant un temps, ens adonem que sempre ens ensenya la mateixa cara en qualsevol \u00e8poca de l\u2019any. Per\u00f2, per qu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?<\/p>\n\n\n\n<p class=\"has-text-align-justify\">La Lluna sempre ens ensenya el mateix paisatge. Sempre li veiem els mateixos <strong>cr\u00e0ters<\/strong>, mars i casquets polars. Aix\u00f2 ens pot portar a concloure que la Lluna no gira sobre el seu eix i que per aix\u00f2 sempre ens ensenya la mateixa cara.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">En realitat la Lluna s\u00ed que gira sobre el seu eix, com qualsevol altre cos a l\u2019univers. La ra\u00f3 per la qual la Lluna nom\u00e9s ens ensenya una cara \u00e9s ben simple. El que passa \u00e9s que la Lluna gira sobre el seu eix i orbita al voltant de la Terra en el mateix interval de temps: 27 dies, 7 hores i 43 minuts. Com que la Lluna tarda el mateix en girar sobre el seu eix i fer una volta a la Terra, nom\u00e9s ens ensenya una de les seves cares (o hemisferi), deixant un hemisferi ocult des de la vista terrestre. Aquesta cara que no es pot veure des de la Terra la coneixem com a <strong>la cara fosca de la Lluna<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Aquest fenomen \u00e9s conseq\u00fc\u00e8ncia de la interacci\u00f3 gravitat\u00f2ria m\u00fatua entre la Terra i la Lluna, que ha provocat que despr\u00e9s de milions d\u2019anys des de la <strong>formaci\u00f3 de la Lluna<\/strong> s\u2019hagin acabat sincronitzant els dos moviments.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">A vegades, des de la Terra, es pot veure un 18% de la cara fosca de la Lluna. L\u2019altre 82% restant no es va fotografiar fins al 1959 per la sonda sovi\u00e8tica Luna 3.<\/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\/2020\/08\/26\/la-cara-fosca-de-la-lluna-que-es-el-que-shi-amaga\/\" target=\"_blank\" rel=\"noreferrer noopener\">La cara fosca de la Lluna. Qu\u00e8 \u00e9s el que s&#8217;hi amaga?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/07\/27\/els-efectes-de-la-lluna-sobre-la-terra\/\" target=\"_blank\" rel=\"noreferrer noopener\">Els efectes de la Lluna sobre la Terra.<\/a><\/p>\n\n\n\n<p><strong>Entrades Populars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/08\/19\/com-seria-viure-a-mart\/\" target=\"_blank\" rel=\"noreferrer noopener\">Com seria viure a Mart?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/07\/06\/quina-estructura-tenen-els-atoms\/\" target=\"_blank\" rel=\"noreferrer noopener\">Quina estructura tenen els \u00e0toms?<\/a><\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/09\/03\/els-anells-de-saturn-la-seva-composicio-i-exploracio\/\" target=\"_blank\">Els anells de Saturn, la seva composici\u00f3 i exploraci\u00f3.<\/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 Lluna ens il\u00b7lumina durant la nit, i \u00e9s l\u2019origen de molts mites, per\u00f2 si la observem durant un temps, ens adonem que sempre ens<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/perque-la-lluna-nomes-ens-ensenya-una-cara\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":164,"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":[69],"tags":[124,116,73],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/09\/Perq_Luna_EnsenyaUna_Cara.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":150,"url":"https:\/\/www.cosmoespai.com\/cat\/la-cara-fosca-de-la-lluna-que-es-el-que-shi-amaga\/","url_meta":{"origin":163,"position":0},"title":"La cara fosca de la Lluna. Qu\u00e8 \u00e9s el que s\u2019hi amaga?","author":"Ferran","date":"26 d'agost de 2020","format":false,"excerpt":"La Lluna, per bonica que sigui, sempre ens ensenya la mateixa cara. Si observes la Lluna durant un temps, t\u2019acabes fixant en que sempre veiem la mateixa cara, el paisatge no canvia. La cara que no es veu des de la Terra s\u2019anomena la cara fosca de la Lluna, tot\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":119,"url":"https:\/\/www.cosmoespai.com\/cat\/els-efectes-de-la-lluna-sobre-la-terra\/","url_meta":{"origin":163,"position":1},"title":"Els efectes de la Lluna sobre la Terra","author":"Ferran","date":"27 de juliol de 2020","format":false,"excerpt":"La Terra i la Lluna formen una parella inseparable. Sota l\u2019efecte d\u2019una for\u00e7a anomenada gravetat, la Terra atreu la Lluna, per\u00f2 la Lluna tamb\u00e9 atreu a la Terra, afectant sobretot als oceans. Aix\u00f2 \u00e9s el que provoca les marees. La Lluna i les marees Dues vegades per dia, el nivell\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/07\/Efectes_Lluna.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/07\/Efectes_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/07\/Efectes_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/07\/Efectes_Lluna.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":303,"url":"https:\/\/www.cosmoespai.com\/cat\/per-que-la-lluna-sallunya-de-la-terra\/","url_meta":{"origin":163,"position":2},"title":"Per qu\u00e8 la Lluna s\u2019allunya de la Terra?","author":"Ferran","date":"3 de maig de 2021","format":false,"excerpt":"Fa milions d\u2019anys, la Lluna estava 18 vegades m\u00e9s a prop de la Terra del que ho est\u00e0 en els nostres dies, i la seva mida aparent al cel era molt m\u00e9s gran de la que observem actualment. Avui en dia sabem que la Lluna s\u2019allunya de nosaltres a una\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.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\/Allunyament_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.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":163,"position":3},"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":308,"url":"https:\/\/www.cosmoespai.com\/cat\/quan-dura-un-dia-als-planetes-interiors\/","url_meta":{"origin":163,"position":4},"title":"Quan dura un dia als planetes interiors?","author":"Ferran","date":"3 de maig de 2021","format":false,"excerpt":"Tots sabem que un dia a la Terra dura 24 hores, i que un any consta de 365 dies (o 366 en un any de trasp\u00e0s), per\u00f2 cal tenir en compte que \u00e9s una mesura molt relativa. La duraci\u00f3 dels dies \u00e9s el resultat del temps que tarda un planeta\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_Interiors.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_Interiors.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Duraci\u00f3Dies_Planetes_Interiors.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_Interiors.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":163,"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\/163"}],"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=163"}],"version-history":[{"count":1,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/163\/revisions"}],"predecessor-version":[{"id":165,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/163\/revisions\/165"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/164"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}