{"id":925,"date":"2004-11-15T14:00:00","date_gmt":"2004-11-15T13:00:00","guid":{"rendered":"https:\/\/kids.esa.int\/star_birth\/"},"modified":"2026-10-08T00:33:50","modified_gmt":"2026-10-07T22:33:50","slug":"star_birth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/ro\/star_birth\/","title":{"rendered":"Na\u0219terea unei stele"},"content":{"rendered":"
\n

La fel ca oamenii, stelele se nasc, \u00eemb\u0103tr\u00e2nesc \u0219i mor. Locul \u00een care se nasc este reprezentat de nori uria\u0219i \u0219i reci de gaz \u0219i praf, cunoscu\u021bi sub numele de \u2018nebuloase\u2019. Cea mai faimoas\u0103 dintre acestea este Nebuloasa Orion, care este abia vizibil\u0103 cu ochiul liber.<\/p>\n<\/div>\n

Aceste nori \u00eencep s\u0103 se mic\u0219oreze sub efectul propriei gravita\u021bii. Pe m\u0103sur\u0103 ce norul se mic\u0219oreaz\u0103, se fragmenteaz\u0103 \u00een aglomer\u0103ri. Fiecare aglomerare ajunge, \u00een cele din urm\u0103, s\u0103 fie at\u00e2t de fierbinte \u0219i de dens\u0103 \u00eenc\u00e2t \u00eencep s\u0103 aib\u0103 loc reac\u021bii nucleare. C\u00e2nd temperatura ajunge la 10 milioane de grade Celsius, aglomerarea devine o nou\u0103 stea.<\/p>\n

Dup\u0103 na\u0219tere, majoritatea stelelor tinere se afl\u0103 \u00een centrul unui disc plat format din gaz \u0219i praf. Cea mai mare parte a acestui material este \u00een cele din urm\u0103 \u00eempr\u0103\u0219tiat\u0103 de radia\u021bia stelei. \u00cenainte ca acest lucru s\u0103 se \u00eent\u00e2mple, se pot forma planete \u00een jurul stelei centrale.<\/p>\n

\"Star-forming
Nor \u00eentunecat \u00een care se formeaz\u0103 stele, surprins de ISO<\/figcaption><\/figure>\n

Observatoarele \u00een infraro\u0219u sunt capabile s\u0103 detecteze c\u0103ldura emanat\u0103 de stelele invizibile care se formeaz\u0103 \u00een interiorul acestor nori. Unul dintre cele mai performante dintre acestea este observatorul spa\u021bial Herschel al ESA, lansat \u00een mai 2009. Herschel va petrece cel pu\u021bin trei ani studiind norii de praf \u00een care se nasc stelele \u2013 mari \u0219i mici.<\/p>","protected":false},"excerpt":{"rendered":"

Like people, stars are born, they grow old and they die. Their birth places are huge, cold clouds of gas and dust, known as ‘nebulas’. The most famous of these […]<\/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\/2004\/01\/nearby_galaxy_ngc_1569_is_a_hotbed_of_star_birth_activity2\/17880180-2-eng-GB\/Nearby_galaxy_NGC_1569_is_a_hotbed_of_star_birth_activity.jpg","esa_banner_description":"Nearby galaxy NGC 1569 is a 'hotbed' of star birth activity","esa_banner_credit":"ESA, NASA and Peter Anders (G\u00f6ttingen University Galaxy Evolution Group, Germany)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/01\/Nearby_galaxy_NGC_1569_is_a_hotbed_of_star_birth_activity2","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-925","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\/ro\/wp-json\/wp\/v2\/posts\/925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/comments?post=925"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/925\/revisions"}],"predecessor-version":[{"id":4742,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/925\/revisions\/4742"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/media?parent=925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/categories?post=925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/tags?post=925"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/panel?post=925"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/language?post=925"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/age?post=925"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/duration?post=925"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/resource_type?post=925"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/audience?post=925"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/wf_post_folders?post=925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}