{"id":77736,"date":"2021-10-31T13:40:19","date_gmt":"2021-10-31T10:40:19","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=77736"},"modified":"2021-10-31T13:40:19","modified_gmt":"2021-10-31T10:40:19","slug":"un-al-doilea-pamant-s-ar-putea-ascunde-in-sistemul-nostru-solar-spune-un-nou-studiu-stiintific-exploziv","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/un-al-doilea-pamant-s-ar-putea-ascunde-in-sistemul-nostru-solar-spune-un-nou-studiu-stiintific-exploziv\/","title":{"rendered":"Un al doilea P\u0103m\u00e2nt s-ar putea ascunde \u00een sistemul nostru solar &#8211; spune un nou studiu \u015ftiin\u0163ific exploziv"},"content":{"rendered":"<figure id=\"attachment_77737\" aria-describedby=\"caption-attachment-77737\" style=\"width: 334px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2021\/10\/planeta-9.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77737\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2021\/10\/planeta-9.jpg\" alt=\"\" width=\"344\" height=\"296\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2021\/10\/planeta-9.jpg 344w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2021\/10\/planeta-9-300x258.jpg 300w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><\/a><figcaption id=\"caption-attachment-77737\" class=\"wp-caption-text\"><em><strong>Imagine:<\/strong><\/em> <a href=\"https:\/\/www.pxfuel.com\/en\/free-photo-opglk\" target=\"_blank\" rel=\"noopener\"><strong>pxfuel.com<\/strong><\/a> (Commons Creative &#8211; free)<\/figcaption><\/figure>\n<p>Cele 8 planete ale nostru sistemului solar nu sunt singurele pe care le-am avut vreodat\u0103, sunt doar supravie\u021buitoarele. Dar asta nu \u00eenseamn\u0103 c\u0103 celelalte planete au fost distruse. P\u0103m\u00e2ntul poate c\u0103 a avut un frate demult pierdut undeva \u00een spa\u021biul interstelar. Cel pu\u021bin o planet\u0103 st\u00e2ncoas\u0103, de aproximativ aceea\u0219i mas\u0103 ca \u015fi Marte, este posibil s\u0103 fi fost \u00eempins\u0103 din sistemul solar timpuriu. Acestea sunt doar c\u00e2teva dintre constat\u0103rile unei lucr\u0103ri \u015ftiin\u0163ifice publicat\u0103 \u00een revista <strong><em>&#8222;Anual Review of Astronomy and Astrophysics&#8221;<\/em><\/strong>.<\/p>\n<p>Ast\u0103zi, planetele din sistemul nostru solar sunt ordonate dup\u0103 m\u0103rime \u0219i compozi\u021bie: cele 4 planete interioare st\u00e2ncoase orbiteaz\u0103 spa\u021biul dintre Soare \u0219i centura de asteroizi (Mercur, Venus, P\u0103m\u00e2nt \u015fi Marte) \u015fi mai avem 4 planete gigantice (Jupiter, Saturn, Uranus \u0219i Neptun) &#8211; care au adunat mase enorme de gaz \u0219i ghea\u021b\u0103 \u00een jurul nucleelor \u200b\u200blor st\u00e2ncoase. Dincolo de Uranus \u0219i Neptun, se afl\u0103 t\u0103r\u00e2mul planetelor pitice, precum Pluto, Eris, Sedna \u0219i vecinii lor chiar mai mici, fie c\u0103 sunt planete pitice sau comete. Dar, parc\u0103 ar lipsi ceva.<\/p>\n<p>Pentru a \u00een\u021belege cum s-a format \u0219i a evoluat sistemul solar, oamenii de \u0219tiin\u021b\u0103 au f\u0103cut simul\u0103ri pe computer, pentru a testa dac\u0103 anumite condi\u021bii sau evenimente ar fi putut produce un sistem solar ca cel pe care \u00eel vedem ast\u0103zi. Iar c\u00e2teva dintre modelele care explic\u0103 cel mai bine sistemul solar modern \u00eencep cu cel pu\u021bin o planet\u0103 \u00een plus \u00eentr-un loc surprinz\u0103tor. Aceste modele sugereaz\u0103 c\u0103 sistemul solar exterior con\u021binea ini\u021bial una sau mai multe planete st\u00e2ncoase, aproximativ de dimensiunea lui Marte sau a P\u0103m\u00e2ntului, \u00een plus fa\u021b\u0103 de gigan\u021bii de gaz \u0219i ghea\u021b\u0103 pe care \u00eei cunoa\u0219tem ast\u0103zi. \u00cen cele din urm\u0103, gravita\u021bia planetelor gigantice au \u00eempins aceste planete st\u00e2ncoase de m\u0103rimea lui Marte departe \u00een sistemul solar, sau le-au aruncat \u00een spa\u021biul interstelar.<\/p>\n<p>Datorit\u0103 modelelor computa\u021bionale, \u0219tim c\u0103 cele patru planete gigantice au orbitat odat\u0103 \u00een jurul Soarelui, la distan\u021be diferite, \u0219i poate chiar \u00eentr-o ordine diferit\u0103, fa\u021b\u0103 de orbitele lor actuale. Pe m\u0103sur\u0103 ce au crescut, gravita\u021bia fiec\u0103rei planete a interac\u021bionat cu celelalte, f\u0103c\u00e2nd planeta Jupiter s\u0103 se apropie de Soare, \u00een timp ce celelalte trei planete au migrat spre exterior. Dar p\u00e2n\u0103 acum, niciun model al migra\u021biei gigan\u021bilor gazo\u015fi nu explic\u0103 modul \u00een care toate obiectele din sistemul solar exterior au ajuns pe orbitele lor actuale. Iar unele dintre planetele pitice \u0219i obiectele mai mici, situate dincolo de Neptun, s-au format mai aproape de centrul sistemului solar \u0219i apoi au fost \u00eempinse \u00een periferia rece de c\u0103tre gigan\u021bii de gaz \u0219i ghea\u021b\u0103.<\/p>\n<p>Orbitele unor obiecte trans-neptuniene nu se apropie niciodat\u0103 de Soare la mai pu\u021bin de 40 UA (1 UA = distan\u021ba dintre P\u0103m\u00e2nt \u0219i Soare). Conform unui cercet\u0103tor al studiului mai sus men\u0163ionat, astrofizicianul Scott Tremaine, simul\u0103rile sale au descoperit c\u0103 \u00een aproximativ jum\u0103tate din cazuri, toate planetele de m\u0103rimea lui Marte din sistemul solar exterior au fost aruncate \u00een spa\u021biul interstelar. Dar, \u00een jum\u0103tatea r\u0103mas\u0103, o planet\u0103 a fost l\u0103sat\u0103 pe o orbit\u0103 similar\u0103 cu cea a obiectelor cere\u015fti din Centura Kuiper (aceasta este centura de materie primordial\u0103 ce \u00eenconjoar\u0103 sistemul solar, extinz\u00e2ndu-se de la orbita planetei Neptun p\u00e2n\u0103 mult \u00een afara sistemului solar). A\u015fadar, planeta 9 este o planet\u0103 asem\u0103n\u0103toare P\u0103m\u00e2ntului, nedescoperit\u0103 \u00eenc\u0103, care poate exista chiar la marginea sistemului nostru solar.<\/p>\n<p>Aceast\u0103 planet\u0103, &#8222;geam\u0103nul P\u0103m\u00e2ntului&#8221;, nu trebuie confundat\u0103 cu celebra &#8222;planet\u0103 X&#8221;, o planet\u0103 ipotetic\u0103 mult mai mare (ca Jupiter-ul), despre care unii oameni de \u0219tiin\u021b\u0103 sugereaz\u0103 c\u0103 ar putea exista \u00een spa\u021biul trans-neptunian.<\/p>\n<p>Observatorul Vera Rubin, c\u00e2nd va \u00eencepe s\u0103 fac\u0103 o topografie a cerului la sf\u00e2r\u0219itul anului 2023, poate fi m\u0103sur\u0103 s\u0103 descopere aceast\u0103 planet\u0103 ascuns\u0103 la marginile sistemului nostru solar. De asemenea, dovezile pot ap\u0103rea \u0219i \u00een datele misiunii spa\u0163iale Gaia a Agen\u021biei Spa\u021biale Europene, dac\u0103 gravita\u021bia planetei nev\u0103zute va modifica lumina stelelor din fundal. Dar, dac\u0103 o planet\u0103 st\u00e2ncoas\u0103 de dimensiuni medii a locuit c\u00e2ndva \u00een sistemul solar exterior, acum r\u0103t\u0103ce\u0219te singur\u0103 \u00een \u00eentuneric \u00een spa\u0163iul planetar \u015fi s-ar putea s\u0103 n-o mai descoperim niciodat\u0103, cu actuala tehnologie&#8230;<\/p>\n<p><em><strong>Sursa<\/strong><\/em> (traducerea \u015fi adaptarea proprie): <a href=\"\/doi\/10.1146\/annurev-astro-120920-010005\" target=\"_blank\" rel=\"noopener\"><strong>studiul \u015ftiin\u0163ific &#8222;Transneptunian Space&#8221; \/ annualreviews.org<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cele 8 planete ale nostru sistemului solar nu sunt singurele pe care le-am avut vreodat\u0103, sunt doar supravie\u021buitoarele. Dar asta nu \u00eenseamn\u0103 c\u0103 celelalte planete au fost distruse. P\u0103m\u00e2ntul poate c\u0103 a avut un frate demult pierdut undeva \u00een spa\u021biul &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Un al doilea P\u0103m\u00e2nt s-ar putea ascunde \u00een sistemul nostru solar &#8211; spune un nou studiu \u015ftiin\u0163ific exploziv\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/un-al-doilea-pamant-s-ar-putea-ascunde-in-sistemul-nostru-solar-spune-un-nou-studiu-stiintific-exploziv\/#more-77736\" aria-label=\"Cite\u0219te mai multe despre Un al doilea P\u0103m\u00e2nt s-ar putea ascunde \u00een sistemul nostru solar &#8211; spune un nou studiu \u015ftiin\u0163ific exploziv\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":77737,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[3922,5636,102,4509,4217,1416,4110,4859,2685,1578,1367,731,952,156,2708,2709,4216,105,732,4858,2922,2364,155,3103,3417,865,3175,2849,1029],"class_list":["post-77736","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-agentia-spatiala-europeana","tag-astrofizician","tag-astronomie","tag-centura-de-asteroizi","tag-centura-kuiper","tag-comete","tag-computer","tag-eris","tag-gaz","tag-gheata","tag-gravitatie","tag-jupiter","tag-lumina","tag-marte","tag-mercur","tag-neptun","tag-orbita","tag-pamant","tag-planeta","tag-planeta-pitica","tag-pluto","tag-revista","tag-saturn","tag-sedna","tag-sistem-solar","tag-soare","tag-stele","tag-uranus","tag-venus","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 al doilea P\u0103m\u00e2nt s-ar putea ascunde \u00een sistemul nostru solar - spune un nou studiu \u015ftiin\u0163ific exploziv - 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-al-doilea-pamant-s-ar-putea-ascunde-in-sistemul-nostru-solar-spune-un-nou-studiu-stiintific-exploziv\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un al doilea P\u0103m\u00e2nt s-ar putea ascunde \u00een sistemul nostru solar - spune un nou studiu \u015ftiin\u0163ific exploziv\" \/>\n<meta property=\"og:description\" content=\"Cele 8 planete ale nostru sistemului solar nu sunt singurele pe care le-am avut vreodat\u0103, sunt doar supravie\u021buitoarele. 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