{"id":195,"date":"2021-12-02T12:44:42","date_gmt":"2021-12-02T11:44:42","guid":{"rendered":"https:\/\/kids.esa.int\/galaxies\/"},"modified":"2026-10-08T00:25:21","modified_gmt":"2026-10-07T22:25:21","slug":"galaxies","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/es\/galaxies\/","title":{"rendered":"Galaxias"},"content":{"rendered":"
\n

Casi todas las estrellas pertenecen a grupos gigantescos llamados galaxias. El Sol es una de las, por lo menos, 100.000 millones de estrellas que existen en nuestra galaxia, la V\u00eda L\u00e1ctea. Y hay cientos de miles de millones de galaxias en el Universo.<\/p>\n<\/div>\n

Donde sea que miremos en el cielo hay galaxias de diferentes formas y tama\u00f1os. Algunas son espirales, con brazos curvados alrededor de un brillante n\u00facleo central.<\/p>\n

Algunas tienen una barra de estrellas que atraviesan su centro, con brazos que parten de cada extremo de la barra. Otras no tienen una forma reconocible. Las galaxias de mayor tama\u00f1o se asemejan a bolas aplastadas. Contienen hasta 10 millones de millones de estrellas, pero muy poco gas o polvo. Casi todas las galaxias tienen en el centro un agujero negro de enorme tama\u00f1o.<\/p>\n

\"When
Cuando las galaxias chocan, como lo demuestran las galaxias Antenas<\/figcaption><\/figure>\n

Las galaxias nacieron s\u00f3lo unos cientos de millones de a\u00f1os despu\u00e9s de que se cre\u00f3 el Universo. En ese pasado remoto de hace unos 13 mil millones de a\u00f1os, las galaxias eran peque\u00f1as y estaban mucho m\u00e1s juntas. Eran comunes las colisiones y, a medida que las galaxias chocaban entre s\u00ed, fueron aumentando de tama\u00f1o y cambiando sus formas.<\/p>\n

Desde entonces el Universo ha estado en expansi\u00f3n. Casi todas las galaxias se separan a gran velocidad, excepto en los c\u00famulos de galaxias, donde danzan unas alrededor de las otras.<\/p>","protected":false},"excerpt":{"rendered":"

Nearly all stars belong to gigantic groups known as galaxies. The Sun is one of at least 100 billion stars in our galaxy, the Milky Way. And there are billions […]<\/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\/2003\/04\/spiral_galaxy_ngc_12322\/17874740-2-eng-GB\/Spiral_galaxy_NGC_1232.jpg","esa_banner_description":"Spiral galaxy NGC 1232","esa_banner_credit":"Spaceweek International","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Spiral_galaxy_NGC_12322","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":[10,11,21],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-195","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-stars-and-galaxies","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/195","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=195"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/195\/revisions"}],"predecessor-version":[{"id":4351,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/195\/revisions\/4351"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/media?parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/categories?post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/tags?post=195"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/panel?post=195"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/language?post=195"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/age?post=195"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/duration?post=195"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/resource_type?post=195"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/audience?post=195"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/wf_post_folders?post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}