{"id":90501,"date":"2024-05-01T07:30:12","date_gmt":"2024-05-01T04:30:12","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=90501"},"modified":"2024-04-30T23:43:12","modified_gmt":"2024-04-30T20:43:12","slug":"marele-anunt-al-existentei-extraterestrilor-va-fi-facut-in-cateva-luni-astronomii-vor-demonstra-in-sfarsit-ca-viata-extraterestra-exista-pe-o-planeta-indepartata-situata-la-120-de-ani-lumina-k2-1","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/marele-anunt-al-existentei-extraterestrilor-va-fi-facut-in-cateva-luni-astronomii-vor-demonstra-in-sfarsit-ca-viata-extraterestra-exista-pe-o-planeta-indepartata-situata-la-120-de-ani-lumina-k2-1\/","title":{"rendered":"Marele anun\u0163 al existen\u0163ei extratere\u015ftrilor va fi f\u0103cut \u00een c\u00e2teva luni: astronomii vor demonstra, \u00een sf\u00e2r\u0219it, c\u0103 via\u021ba extraterestr\u0103 exist\u0103 pe o planet\u0103 \u00eendep\u0103rtat\u0103, situat\u0103 la 120 de ani-lumin\u0103: K2-18 b! S\u0103-i credem?"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2024\/04\/K2-18b-pamant.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-90502\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2024\/04\/K2-18b-pamant.jpg\" alt=\"\" width=\"353\" height=\"213\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2024\/04\/K2-18b-pamant.jpg 353w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2024\/04\/K2-18b-pamant-300x181.jpg 300w\" sizes=\"auto, (max-width: 353px) 100vw, 353px\" \/><\/a>Un astrofizician de la Universitatea din Cambridge a surprins lumea cu declara\u021biile sale. Nikku Madhusudhan crede c\u0103 am g\u0103sit deja via\u021b\u0103 extraterestr\u0103 pe o exoplanet\u0103 numit\u0103 K2-18 b. Dup\u0103 observa\u021biile f\u0103cute, astronomii vor putea demonstra \u00een sf\u00e2r\u0219it c\u0103 via\u021ba extraterestr\u0103 exist\u0103 pe o planet\u0103 \u00eendep\u0103rtat\u0103.<\/p>\n<p>Planeta K2-18b, de peste dou\u0103 ori dimensiunea P\u0103m\u00e2ntului, la 120 de ani-lumin\u0103 distan\u021b\u0103 fa\u0163\u0103 de noi, este situat\u0103 \u00een zona locuibil\u0103 a stelei sale, \u00een constela\u021bia Leului. \u00cen 2023, oamenii de \u0219tiin\u021b\u0103 au detectat sulfur\u0103 de dimetil \u00een atmosfera sa, un compus care poate produce via\u021b\u0103. Acum, pentru a confirma descoperirea, telescopul spa\u021bial James Webb va efectua \u00eendelungate observa\u021bii asupra exoplanetei respective. Deci am putea fi la c\u00e2teva luni distan\u021b\u0103 de un anun\u021b oficial al descoperirii vie\u021bii extraterestre.<\/p>\n<p>Cercet\u0103rile asupra planetei K2-18b sunt conduse de dr. Nikku Madhusudhan, astrofizician la Universitatea din Cambridge. Exoplaneta este una st\u00e2ncoas\u0103, cu o atmosfer\u0103 bogat\u0103 \u00een hidrogen \u0219i oceane de ap\u0103. Dr Madhusudhan a spus \u00eentr-o declara\u021bie: <em>&#8222;Dac\u0103 detect\u0103m sulfura de dimetil (DMS) \u00een K2-18b, practic planeta poate fi locuit\u0103&#8221;.<\/em><\/p>\n<p>K2-18b a fost descoperit\u0103 \u00een 2015. Dar abia \u00een 2019 a fost raportat\u0103 prezen\u021ba vaporilor de ap\u0103 \u00een atmosfera lui K2-18b. Apoi, \u00een 2023, telescopul James Webb a detectat dioxid de carbon \u0219i metan \u00een atmosfera sa. Aceasta sus\u021bine teoria c\u0103 un ocean de ap\u0103 poate exista sub o atmosfer\u0103 bogat\u0103 \u00een hidrogen.<\/p>\n<p>Primele observa\u021bii ale telescopului spa\u0163ial au f\u0103cut posibil\u0103 detectarea unei molecule numit\u0103 sulfur\u0103 de dimetil (DMS), care pe P\u0103m\u00e2nt este produs\u0103 doar de via\u021b\u0103. Majoritatea DMS-urilor din atmosfera P\u0103m\u00e2ntului sunt emise de fitoplanctonuri \u00een mediile marine, suger\u00e2nd un mod similar de via\u021b\u0103 pe planeta \u00eendep\u0103rtat\u0103. Oamenii de \u0219tiin\u021b\u0103 nu au putut s\u0103 se g\u00e2ndeasc\u0103 la niciun proces geologic sau chimic natural care ar putea crea DMS f\u0103r\u0103 organisme vii. Dr. Madhusudhan a spus c\u0103 descoperirea a fost un \u0219oc, dar, deoarece acestea au fost observa\u021bii ini\u021biale, el a putut spune doar cu 50% certitudine c\u0103 DMS a fost prezent \u00een K2-18b.<\/p>\n<p>Vineri, 26 aprilie 2024, telescopul James Webb a efectuat 8 \u200bore de observa\u021bii care ar trebui s\u0103 ofere un r\u0103spuns definitiv, de\u0219i expertul va trebui s\u0103 petreac\u0103 luni \u00eentregi analiz\u00e2nd datele ob\u021binute. James Webb este capabil s\u0103 analizeze compozi\u021bia chimic\u0103 a unei planete \u00eendep\u0103rtate prin captarea luminii de la steaua gazd\u0103 dup\u0103 ce aceasta a trecut prin atmosfera planetei \u00een drum spre P\u0103m\u00e2nt. Gazele din atmosfer\u0103 absorb o parte din lumina stelelor, dar las\u0103 semne revelatoare \u00een spectrul de lumin\u0103 pe care astronomii le pot descifra.<\/p>\n<p>K2-18b este cunoscut ca un &#8222;Super P\u0103m\u00e2nt&#8221; sau &#8222;Sub Neptun&#8221;, deoarece este mai mare dec\u00e2t planeta noastr\u0103, dar mai mic dec\u00e2t Neptun. Dimensiunea mare a lui K2-18b &#8211; cu o raz\u0103 de 2,6 ori mai mare dec\u00e2t cea a P\u0103m\u00e2ntului &#8211; \u00eenseamn\u0103 c\u0103 interiorul planetei con\u021bine probabil o manta mare de ghea\u021b\u0103 de \u00eenalt\u0103 presiune, precum Neptun, dar o atmosfer\u0103 mai sub\u021bire, bogat\u0103 \u00een hidrogen \u0219i o suprafa\u021b\u0103 oceanic\u0103. Subhajit Sarkar, cercet\u0103tor la Universitatea Cardiff, a spus \u00eentr-o declara\u021bie: <em>&#8222;De\u0219i acest tip de planet\u0103 nu exist\u0103 \u00een sistemul nostru solar, Sub Neptunurile sunt cel mai comun tip de planet\u0103 cunoscut p\u00e2n\u0103 acum \u00een galaxie. Am ob\u021binut p\u00e2n\u0103 \u00een prezent cel mai detaliat spectru al unui Sub Neptun din zona locuibil\u0103, ceea ce ne-a permis s\u0103 determin\u0103m moleculele atmosferei sale&#8221;<\/em>. Rezultatele cercet\u0103rii au fost publicate \u00een revista <strong><em>&#8222;The Astrophysical Journal Letters&#8221;<\/em><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un astrofizician de la Universitatea din Cambridge a surprins lumea cu declara\u021biile sale. Nikku Madhusudhan crede c\u0103 am g\u0103sit deja via\u021b\u0103 extraterestr\u0103 pe o exoplanet\u0103 numit\u0103 K2-18 b. Dup\u0103 observa\u021biile f\u0103cute, astronomii vor putea demonstra \u00een sf\u00e2r\u0219it c\u0103 via\u021ba extraterestr\u0103 &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Marele anun\u0163 al existen\u0163ei extratere\u015ftrilor va fi f\u0103cut \u00een c\u00e2teva luni: astronomii vor demonstra, \u00een sf\u00e2r\u0219it, c\u0103 via\u021ba extraterestr\u0103 exist\u0103 pe o planet\u0103 \u00eendep\u0103rtat\u0103, situat\u0103 la 120 de ani-lumin\u0103: K2-18 b! S\u0103-i credem?\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/marele-anunt-al-existentei-extraterestrilor-va-fi-facut-in-cateva-luni-astronomii-vor-demonstra-in-sfarsit-ca-viata-extraterestra-exista-pe-o-planeta-indepartata-situata-la-120-de-ani-lumina-k2-1\/#more-90501\" aria-label=\"Cite\u0219te mai multe despre Marele anun\u0163 al existen\u0163ei extratere\u015ftrilor va fi f\u0103cut \u00een c\u00e2teva luni: astronomii vor demonstra, \u00een sf\u00e2r\u0219it, c\u0103 via\u021ba extraterestr\u0103 exist\u0103 pe o planet\u0103 \u00eendep\u0103rtat\u0103, situat\u0103 la 120 de ani-lumin\u0103: K2-18 b! S\u0103-i credem?\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":90502,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[601,5636,102,2502,463,2537,356,3460,18848,433,2635,18850,952,1579,4218,2709,105,732,2364,18849,17432,2250,366],"class_list":["post-90501","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-apa","tag-astrofizician","tag-astronomie","tag-atmosfera","tag-cambridge","tag-cardiff","tag-dioxid-de-carbon","tag-exoplaneta","tag-fitoplancton","tag-galaxie","tag-hidrogen","tag-k2-18b","tag-lumina","tag-metan","tag-molecula","tag-neptun","tag-pamant","tag-planeta","tag-revista","tag-sulfura-de-dimetil","tag-telescopul-james-webb","tag-universitate","tag-viata","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Marele anun\u0163 al existen\u0163ei extratere\u015ftrilor va fi f\u0103cut \u00een c\u00e2teva luni: astronomii vor demonstra, \u00een sf\u00e2r\u0219it, c\u0103 via\u021ba extraterestr\u0103 exist\u0103 pe o planet\u0103 \u00eendep\u0103rtat\u0103, situat\u0103 la 120 de ani-lumin\u0103: K2-18 b! 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