{"id":69661,"date":"2020-05-27T19:01:19","date_gmt":"2020-05-27T16:01:19","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=69661"},"modified":"2020-05-27T19:01:19","modified_gmt":"2020-05-27T16:01:19","slug":"un-nou-studiu-astronomic-socant-arata-ca-soarele-si-pamantul-nu-ar-fi-existat-daca-o-galaxie-pitica-vecina-sagetatorul-nu-s-ar-fi-ciocnit-cu-galaxia-noastra-calea-lactee","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/un-nou-studiu-astronomic-socant-arata-ca-soarele-si-pamantul-nu-ar-fi-existat-daca-o-galaxie-pitica-vecina-sagetatorul-nu-s-ar-fi-ciocnit-cu-galaxia-noastra-calea-lactee\/","title":{"rendered":"Un nou studiu astronomic \u015focant arat\u0103 c\u0103 Soarele \u015fi P\u0103m\u00e2ntul nu ar fi existat dac\u0103 o galaxie pitic\u0103 vecin\u0103, S\u0103get\u0103torul, nu s-ar fi ciocnit cu galaxia noastr\u0103, Calea Lactee"},"content":{"rendered":"<figure id=\"attachment_69663\" aria-describedby=\"caption-attachment-69663\" style=\"width: 353px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/Sagetatorul-Calea-Lactee.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-69663\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/Sagetatorul-Calea-Lactee.jpg\" alt=\"\" width=\"363\" height=\"258\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/Sagetatorul-Calea-Lactee.jpg 363w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/Sagetatorul-Calea-Lactee-300x213.jpg 300w\" sizes=\"auto, (max-width: 363px) 100vw, 363px\" \/><\/a><figcaption id=\"caption-attachment-69663\" class=\"wp-caption-text\"><strong>Imagine:<\/strong> Agentia Spatiala Europeana<\/figcaption><\/figure>\n<p>Formarea Soarelui, a sistemului Solar \u0219i apari\u021bia ulterioar\u0103 a vie\u021bii pe P\u0103m\u00e2nt poate fi o consecin\u021b\u0103 a unei coliziuni \u00eentre galaxia noastr\u0103, Calea Lactee \u0219i o galaxie mai mic\u0103 numit\u0103 S\u0103get\u0103torul, descoperit\u0103 \u00een anii 1990, care orbiteaz\u0103 galaxia \u00een care noi tr\u0103im.<\/p>\n<p>Astronomii \u0219tiau c\u0103 S\u0103get\u0103torul intr\u0103 \u00een coliziune \u00een mod repetat cu discul C\u0103ii Lactee, deoarece orbita sa \u00een jurul centrului galaxiei noastre galaxiei se \u00eent\u0103re\u0219te ca urmare a for\u021belor gravita\u021bionale. Studii anterioare au sugerat c\u0103 S\u0103get\u0103torul, o a\u0219a-numit\u0103 galaxie pitic\u0103, a avut un efect mare asupra modului \u00een care stelele se mi\u0219c\u0103 \u00een Calea Lactee. Unii chiar sus\u021bin c\u0103 structura \u00een spiral\u0103 a C\u0103ii Lactee (care e de 10.000 de ori mai masiv\u0103 dec\u00e2t vecina sa) ar putea fi rezultatul a cel pu\u021bin trei coliziuni cunoscute cu S\u0103get\u0103torul \u00een ultimele 6 miliarde de ani.<\/p>\n<p>Un nou studiu, bazat pe datele culese de sonda spa\u0163ial\u0103 Gaia a Agen\u0163iei Spa\u0163iale Europene, a dezv\u0103luit pentru prima dat\u0103 c\u0103 influen\u021ba S\u0103get\u0103torului asupra C\u0103ii Lactee poate fi \u0219i mai substan\u021bial\u0103. Efectele provocate de aceste ciocniri par s\u0103 fi declan\u0219at etapele majore \u00een formarea stelelor, dintre care o etap\u0103 coincide aproximativ cu momentul form\u0103rii Soarelui, \u00een urm\u0103 cu circa 4,7 miliarde de ani.<\/p>\n<figure id=\"attachment_69662\" aria-describedby=\"caption-attachment-69662\" style=\"width: 530px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/impact-Calea-LACTEE-Sagetatorul.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-69662\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/impact-Calea-LACTEE-Sagetatorul.jpg\" alt=\"\" width=\"540\" height=\"303\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/impact-Calea-LACTEE-Sagetatorul.jpg 540w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2020\/05\/impact-Calea-LACTEE-Sagetatorul-300x168.jpg 300w\" sizes=\"auto, (max-width: 540px) 100vw, 540px\" \/><\/a><figcaption id=\"caption-attachment-69662\" class=\"wp-caption-text\">Impactul Sagetatorului cu Calea Lactee &#8211; S<em><strong>ursa:<\/strong><\/em> Agentia Spatiala Europeana<\/figcaption><\/figure>\n<p>Tomas Ruiz-Lara, cercet\u0103tor de astrofizic\u0103 la Institutul de Astrofizic\u0103 de Canarias (IAC) din Tenerife, Spania, autor principal al noului studiu publicat \u00een revista <em>&#8222;Nature Astronomy&#8221;<\/em> explic\u0103: <em>\u201eLa \u00eenceput avem o galaxie, Calea Lactee, care este relativ lini\u0219tit\u0103. Dup\u0103 o epoc\u0103 ini\u021bial\u0103 violent\u0103 de formare a stelelor, Calea Lactee a ajuns la o stare echilibrat\u0103 \u00een care stelele se formau constant. Dintr-o dat\u0103, galaxia S\u0103get\u0103torul a intrat \u00een coliziune \u0219i a perturbat echilibrul, determin\u00e2nd ca tot gazul \u0219i praful care \u00eenc\u0103 mai erau \u00een interiorul galaxiei mai mari s\u0103 se agite, asemenea unor unduiri pe ap\u0103. \u00cen unele zone ale C\u0103ii Lactee, aceste unduiri au dus la concentra\u021bii mai mari de praf \u0219i gaz. Densitatea ridicat\u0103 a materialului din zonele respective au determinat apoi la formarea de stele noi&#8221;<\/em>.<\/p>\n<p>De fapt, e posibil ca nici Soarele \u0219i planetele sale n-ar fi existat dac\u0103 galaxia pitic\u0103 S\u0103get\u0103torul, atras\u0103 de puterea gravita\u021bional\u0103 a C\u0103ii Lactee, nu ar fi p\u0103truns prin discul galaxiei noastre. Cercet\u0103torii nu sunt siguri dac\u0103 astfel s-a format Soarele, dar e posibil, deoarece v\u00e2rsta Soarelui coincide cu stelele formate \u00een urma efectului &#8222;S\u0103get\u0103torul&#8221;.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Formarea Soarelui, a sistemului Solar \u0219i apari\u021bia ulterioar\u0103 a vie\u021bii pe P\u0103m\u00e2nt poate fi o consecin\u021b\u0103 a unei coliziuni \u00eentre galaxia noastr\u0103, Calea Lactee \u0219i o galaxie mai mic\u0103 numit\u0103 S\u0103get\u0103torul, descoperit\u0103 \u00een anii 1990, care orbiteaz\u0103 galaxia \u00een care &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Un nou studiu astronomic \u015focant arat\u0103 c\u0103 Soarele \u015fi P\u0103m\u00e2ntul nu ar fi existat dac\u0103 o galaxie pitic\u0103 vecin\u0103, S\u0103get\u0103torul, nu s-ar fi ciocnit cu galaxia noastr\u0103, Calea Lactee\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/un-nou-studiu-astronomic-socant-arata-ca-soarele-si-pamantul-nu-ar-fi-existat-daca-o-galaxie-pitica-vecina-sagetatorul-nu-s-ar-fi-ciocnit-cu-galaxia-noastra-calea-lactee\/#more-69661\" aria-label=\"Cite\u0219te mai multe despre Un nou studiu astronomic \u015focant arat\u0103 c\u0103 Soarele \u015fi P\u0103m\u00e2ntul nu ar fi existat dac\u0103 o galaxie pitic\u0103 vecin\u0103, S\u0103get\u0103torul, nu s-ar fi ciocnit cu galaxia noastr\u0103, Calea Lactee\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":69663,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[3922,7396,102,1405,3174,433,2693,1367,4216,105,732,6987,2364,9237,3417,865,318,3175,2250,366],"class_list":["post-69661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-agentia-spatiala-europeana","tag-astronomi","tag-astronomie","tag-calea-lactee","tag-gaia","tag-galaxie","tag-gaze","tag-gravitatie","tag-orbita","tag-pamant","tag-planeta","tag-praf","tag-revista","tag-sagetatorul","tag-sistem-solar","tag-soare","tag-spania","tag-stele","tag-universitate","tag-viata","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Un nou studiu astronomic \u015focant arat\u0103 c\u0103 Soarele \u015fi P\u0103m\u00e2ntul nu ar fi existat dac\u0103 o galaxie pitic\u0103 vecin\u0103, S\u0103get\u0103torul, nu s-ar fi ciocnit cu galaxia noastr\u0103, Calea Lactee - Secretele lui Lovendal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lovendal.ro\/wp52\/un-nou-studiu-astronomic-socant-arata-ca-soarele-si-pamantul-nu-ar-fi-existat-daca-o-galaxie-pitica-vecina-sagetatorul-nu-s-ar-fi-ciocnit-cu-galaxia-noastra-calea-lactee\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un nou studiu astronomic \u015focant arat\u0103 c\u0103 Soarele \u015fi P\u0103m\u00e2ntul nu ar fi existat dac\u0103 o galaxie pitic\u0103 vecin\u0103, S\u0103get\u0103torul, nu s-ar fi ciocnit cu galaxia noastr\u0103, Calea Lactee\" \/>\n<meta property=\"og:description\" content=\"Formarea Soarelui, a sistemului Solar \u0219i apari\u021bia ulterioar\u0103 a vie\u021bii pe P\u0103m\u00e2nt poate fi o consecin\u021b\u0103 a unei coliziuni \u00eentre galaxia noastr\u0103, Calea Lactee \u0219i o galaxie mai mic\u0103 numit\u0103 S\u0103get\u0103torul, descoperit\u0103 \u00een anii 1990, care orbiteaz\u0103 galaxia \u00een care ... 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