{"id":1119,"date":"2004-11-15T13:46:00","date_gmt":"2004-11-15T12:46:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_birth_of_galaxies\/"},"modified":"2026-10-08T00:36:12","modified_gmt":"2026-10-07T22:36:12","slug":"the_birth_of_galaxies","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/es\/the_birth_of_galaxies\/","title":{"rendered":"El nacimiento de las galaxias"},"content":{"rendered":"
\n

No podemos ver nada de lo que ocurri\u00f3 durante los primeros 300 000 a\u00f1os del Universo. Los cient\u00edficos intentan averiguarlo a partir de sus conocimientos sobre las part\u00edculas at\u00f3micas y de modelos inform\u00e1ticos.<\/p>\n<\/div>\n

La \u00fanica evidencia directa del propio Big Bang es un d\u00e9bil resplandor en el espacio. Los veh\u00edculos espaciales y telescopios en globos lo ven como un patr\u00f3n desigual de gas ligeramente o m\u00e1s caliente o m\u00e1s fr\u00edo, que nos rodea por completo. Estas ondulaciones tambi\u00e9n muestran los lugares donde las nubes de hidr\u00f3geno eran un poco m\u00e1s densas.<\/p>\n

A lo largo de millones de a\u00f1os, las \u00e1reas densas atrajeron materia porque ten\u00edan m\u00e1s gravedad. Finalmente, cerca de 100 millones de a\u00f1os despu\u00e9s del Big Bang, el gas se calent\u00f3 y alcanz\u00f3 una densidad suficiente como para dar origen a las primeras estrellas.<\/p>\n

Las nuevas estrellas nac\u00edan a una velocidad 10 veces mayor que en el Universo actual. Los grandes c\u00famulos de estrellas pronto se convirtieron en las primeras galaxias.<\/p>\n

\"Hubble's
La c\u00e1mara m\u00e1s nueva del Hubble observa un foco de formaci\u00f3n estelar<\/figcaption><\/figure>\n

El Telecospio Espacial Hubble y potentes telescopios terrestres ahora est\u00e1n comenzando a encontrar galaxias creadas cerca de un bill\u00f3n de a\u00f1os despu\u00e9s del Big Bang. Estas peque\u00f1as galaxias estaban mucho m\u00e1s cerca las unas de las otras que las galaxias de hoy en d\u00eda. Eran comunes las colisiones. Como dos llamas aproxim\u00e1ndose la una a la otra, se fusionaron para crear galaxias de mayor tama\u00f1o. Nuestra galaxia, la V\u00eda L\u00e1ctea, naci\u00f3 de este modo.<\/p>","protected":false},"excerpt":{"rendered":"

We cannot see anything that happened during the first 300  000 years of the Universe. Scientists try to work it out from their knowledge of atomic particles and from computer […]<\/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\/05\/artist_s_impression_of_the_birth_of_our_galaxy2\/17907421-2-eng-GB\/Artist_s_impression_of_the_birth_of_our_Galaxy.jpg","esa_banner_description":"Artist's impression of the birth of our Galaxy","esa_banner_credit":"NASA and Adolf Schaller","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/05\/Artist_s_impression_of_the_birth_of_our_Galaxy2","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":[10,11,19],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1119","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-story-of-the-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1119","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=1119"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1119\/revisions"}],"predecessor-version":[{"id":4856,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/posts\/1119\/revisions\/4856"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/media?parent=1119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/categories?post=1119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/tags?post=1119"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/panel?post=1119"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/language?post=1119"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/age?post=1119"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/duration?post=1119"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/resource_type?post=1119"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/audience?post=1119"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/es\/wp-json\/wp\/v2\/wf_post_folders?post=1119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}