{"id":1101,"date":"2005-12-09T13:07:00","date_gmt":"2005-12-09T12:07:00","guid":{"rendered":"https:\/\/kids.esa.int\/moons_and_rings\/"},"modified":"2026-10-08T00:36:01","modified_gmt":"2026-10-07T22:36:01","slug":"moons_and_rings","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/es\/moons_and_rings\/","title":{"rendered":"Lunas y anillos"},"content":{"rendered":"<div class=\"lede\">\n<p>Todos los planetas giran alrededor del Sol en sentido antihorario \u2014visto desde arriba del polo norte de la Tierra\u2014. Su a\u00f1o \u2014el tiempo que tardan en completar una \u00f3rbita\u2014 var\u00eda en funci\u00f3n de su distancia al Sol. Un a\u00f1o en Mercurio dura solo 88 d\u00edas terrestres, por lo que alguien nacido all\u00ed tendr\u00eda cuatro veces m\u00e1s cumplea\u00f1os que nosotros en la Tierra. Por el contrario, un a\u00f1o en Plut\u00f3n equivale a 248 de nuestros a\u00f1os. \u00a1Alguien nacido en Plut\u00f3n nunca celebrar\u00eda un cumplea\u00f1os!<\/p>\n<\/div>\n<p>Venus y Mercurio no tienen sat\u00e9lites naturales, pero los seis planetas restantes tienen lunas que giran en torno a ellos. La cantidad total registrada hasta la fecha es de 162. La mayor\u00eda de las lunas son muy peque\u00f1as y dif\u00edciles de ver, incluso con telescopios potentes. En la actualidad el r\u00e9cord lo tiene J\u00fapiter, con 63 sat\u00e9lites conocidos. Entre ellos hay cuatro con dimensiones de planeta; Gan\u00edmedes (el sat\u00e9lite m\u00e1s grande del Sistema Solar), Calisto, Europa e \u00cdo.<\/p>\n<p>La fuerte gravedad de los dem\u00e1s gigantes gaseosos tambi\u00e9n ha atra\u00eddo a un gran n\u00famero de sat\u00e9lites: Saturno tiene 31, Urano 27 y Neptuno 13. Tanto la Tierra como Plut\u00f3n tienen una luna grande que orbita a su alrededor.<\/p>\n<p>Los cuatro planetas m\u00e1s grandes \u2014J\u00fapiter, Saturno, Urano y Neptuno\u2014 tambi\u00e9n tienen anillos. Est\u00e1n formados por fragmentos de hielo y roca cuyo tama\u00f1o var\u00eda desde el de una monta\u00f1a hasta el del humo de un cigarrillo. Los anillos podr\u00edan ser restos de una luna que se desintegr\u00f3, o fragmentos que se han desprendido de lunas cercanas.<\/p>","protected":false},"excerpt":{"rendered":"<p>All of the planets travel around the Sun in a counter-clockwise direction \u2013 as seen from above Earth\u2019s north pole. Their year &#8211; the time they take to complete one [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2005\/04\/jupiter_s_moon_europa2\/17905460-2-eng-GB\/Jupiter_s_moon_Europa.jpg","esa_banner_description":"Jupiter's moon, Europa","esa_banner_credit":"NASA\/DLR","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/04\/Jupiter_s_moon_Europa2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,12],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1101","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/comments?post=1101"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1101\/revisions"}],"predecessor-version":[{"id":2244,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1101\/revisions\/2244"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/media?parent=1101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/categories?post=1101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/tags?post=1101"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/panel?post=1101"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/language?post=1101"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/age?post=1101"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/duration?post=1101"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/resource_type?post=1101"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/audience?post=1101"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/wf_post_folders?post=1101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}