{"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\/it\/star_birth\/","title":{"rendered":"La nascita delle stelle"},"content":{"rendered":"<div class=\"lede\">\n<p>Proprio come le persone, le stelle nascono, invecchiano e muoiono. Il luogo in cui nascono \u00e8 costituito da enormi e fredde nubi di gas e polvere, note come \u2018nebulose\u2019. La pi\u00f9 famosa tra queste \u00e8 la nebulosa di Orione, appena visibile ad occhio nudo.<\/p>\n<\/div>\n<p>Man mano che la nube diventa pi\u00fa piccola, si divide in ammassi, ognuno dei quali, alla fine, diventa cos\u00ec caldo e denso da dare inizio a reazioni nucleari. Quando la temperatura raggiunge 10 milioni di gradi centigradi, l'ammasso diventa una nuova stella.<\/p>\n<p>Dopo la nascita la maggior parte delle giovani stelle si trova al centro di un disco piatto di gas e polveri. La maggior parte di questo materiale viene prima o poi espulso dalle radiazioni stellari. Prima che questo accada, si possono formare pianeti attorno alla stella centrale.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA\/ISO, CEA Saclay and ISOCAM Consortium\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/1998\/01\/Star-forming_dark_cloud_imaged_by_ISO2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/1998\/01\/star-forming_dark_cloud_imaged_by_iso2\/17863159-3-eng-GB\/Star-forming_dark_cloud_imaged_by_ISO.jpg\" alt=\"Star-forming dark cloud imaged by ISO\"><figcaption>Nube oscura in cui si formano stelle, ripresa dall\u2019ISO<\/figcaption><\/figure>\n<p>Gli osservatori a infrarossi sono in grado di rilevare il calore proveniente dalle stelle invisibili che si stanno formando all\u2019interno di tali nubi. Uno dei pi\u00f9 potenti tra questi \u00e8 l\u2019osservatorio spaziale Herschel dell\u2019ESA, lanciato nel maggio 2009. Herschel trascorrer\u00e0 almeno tre anni a studiare le nubi polverose in cui nascono le stelle, grandi e piccole.<\/p>","protected":false},"excerpt":{"rendered":"<p>Like people, stars are born, they grow old and they die. Their birth places are huge, cold clouds of gas and dust, known as &#8216;nebulas&#8217;. The most famous of these [&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\/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\/it\/wp-json\/wp\/v2\/posts\/925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/comments?post=925"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/posts\/925\/revisions"}],"predecessor-version":[{"id":4742,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/posts\/925\/revisions\/4742"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/media?parent=925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/categories?post=925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/tags?post=925"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/panel?post=925"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/language?post=925"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/age?post=925"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/duration?post=925"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/resource_type?post=925"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/audience?post=925"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/it\/wp-json\/wp\/v2\/wf_post_folders?post=925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}