{"id":103065,"date":"2026-08-02T23:32:37","date_gmt":"2026-08-02T20:32:37","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=103065"},"modified":"2026-08-02T23:32:37","modified_gmt":"2026-08-02T20:32:37","slug":"telescopul-spatial-james-webb-a-descoperit-apa-semigrea-pe-o-exoplaneta-situata-la-700-de-ani-lumina-distanta-fata-de-noi","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/telescopul-spatial-james-webb-a-descoperit-apa-semigrea-pe-o-exoplaneta-situata-la-700-de-ani-lumina-distanta-fata-de-noi\/","title":{"rendered":"Telescopul spa\u0163ial James Webb a descoperit ap\u0103 semigrea pe o exoplanet\u0103 situat\u0103 la 700 de ani-lumin\u0103 distan\u0163\u0103 fa\u0163\u0103 de noi"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2026\/08\/apa-exoplaneta.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-103066\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2026\/08\/apa-exoplaneta.jpg\" alt=\"\" width=\"359\" height=\"287\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2026\/08\/apa-exoplaneta.jpg 359w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2026\/08\/apa-exoplaneta-300x240.jpg 300w\" sizes=\"auto, (max-width: 359px) 100vw, 359px\" \/><\/a>O semn\u0103tur\u0103 chimic\u0103 rar\u0103 a fost detectat\u0103 \u00een atmosfera unei lumi extraterestre aflate la aproximativ 700 de ani-lumin\u0103 distan\u021b\u0103, gra\u021bie <strong>Telescopului Spa\u021bial James Webb<\/strong> (<strong>JWST<\/strong>). Cercet\u0103torii au identificat <strong>ap\u0103 semigrea<\/strong> (<strong>HDO<\/strong>) pe exoplaneta <strong>WASP-39b<\/strong>. Vestea vine \u00een contextul \u00een care astronomii continu\u0103 s\u0103 utilizeze un instrument revolu\u021bionr \u00een infraro\u0219u de pe JWST, pentru a sonda atmosfere \u00eendep\u0103rtate, inaugur\u00e2nd o nou\u0103 er\u0103 \u00een cercetarea exoplanetelor. De\u0219i telescopul exploreaz\u0103 \u00een mod curent cele mai vechi ere ale Universului, este din ce \u00een ce mai mult \u00eens\u0103rcinat cu o c\u0103utare a apei &#8211; cerin\u021ba fundamental\u0103 pentru apari\u021bia vie\u021bii a\u0219a cum o cunoa\u0219tem.<\/p>\n<p>Totu\u0219i, echipa din spatele acestui ultim studiu nu a c\u0103utat doar apa standard (<strong>H2O<\/strong>). Ei au c\u0103utat izotopi specifici ai apei. Ace\u0219tia sunt variante diverse ale moleculei de ap\u0103 care difer\u0103 prin num\u0103rul de neutroni. Apa semigrea, cunoscut\u0103 chimic sub numele de HDO, este \u00een esen\u021b\u0103 o molecul\u0103 standard de ap\u0103 cu o u\u0219oar\u0103 modificare. Unul dintre cei doi atomi de hidrogen ai s\u0103i este un izotop al deuteriului, f\u0103cut pu\u021bin mai greu prin ad\u0103ugarea unui neutron, \u00een timp ce cel\u0103lalt atom de hidrogen men\u021bine un singur proton \u0219i un electron standard. Prin determinarea raportului deuteriu-hidrogen (D\/H) din apa din atmosfera planetei WASP-39b, cercet\u0103torii pot deduce detalii critice despre formarea planetei.<\/p>\n<p>Cercet\u0103torii au comparat modelele atmosferice predefinite cu datele reale JWST, lu\u00e2nd \u00een considerare variabile precum temperatura, acoperirea cu nori, opacitatea atmosferic\u0103 \u0219i abunden\u021bele moleculare. Rezultatele au indicat c\u0103 raportul D\/H dedus pentru WASP-39b este semnificativ crescut \u00een compara\u021bie cu gigan\u021bii gazo\u0219i ai sistemului solar. Acest raport ridicat ar putea fi determinat de un proces cunoscut sub numele de evadare atmosferic\u0103. Deoarece apa mai grea are o greutate molecular\u0103 pu\u021bin mai mare, este mai pu\u021bin probabil s\u0103 scape \u00een spa\u021biu dec\u00e2t apa obi\u0219nuit\u0103. Moleculele mai u\u0219oare se infiltreaz\u0103 adesea din corpuri mai mici, puternic iradiate, c\u0103rora le lipse\u0219te atrac\u021bia gravita\u021bional\u0103 pentru a le re\u021bine.<\/p>\n<p>Av\u00e2nd \u00een vedere c\u0103 WASP-39b este o planet\u0103 gigant\u0103 gazoas\u0103 fierbinte, cu gravita\u021bie redus\u0103, este logic c\u0103 ar putea s\u0103-\u0219i elibereze apa obi\u0219nuit\u0103 destul de rapid. Amestecarea atmosferic\u0103 \u0219i reac\u021biile chimice determinate de lumin\u0103 ar fi putut, de asemenea, contribui la raportul observat. Alternativ, raportul ridicat ar putea sugera un istoric diferit al form\u0103rii. WASP-39b s-ar fi putut forma \u00een zonele mai reci \u0219i mai \u00eendep\u0103rtate ale sistemului s\u0103u stelar, mo\u0219tenind material bogat \u00een ap\u0103.<\/p>\n<p>Este esen\u021bial de men\u021bionat c\u0103 WASP-39b \u00een sine nu este un candidat pentru via\u021b\u0103. Av\u00e2nd temperaturi de 1.000 de grade Celsius, este un mediu dur \u0219i nu un model de locuibilitate. Cu toate acestea, aceast\u0103 detectare reu\u0219it\u0103 demonstreaz\u0103 c\u0103 urm\u0103rirea acestor markeri chimici complec\u0219i este posibil\u0103.<\/p>\n<p><strong>Sursa:<\/strong> studiul \u015ftiin\u0163ific <a href=\"https:\/\/arxiv.org\/abs\/2607.19579\" target=\"_blank\" rel=\"noopener\"><strong>&#8222;Atmospheric retrieval evidence for water isotopologue HDO on exoplanet WASP-39b&#8221; \/ arxiv.org<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O semn\u0103tur\u0103 chimic\u0103 rar\u0103 a fost detectat\u0103 \u00een atmosfera unei lumi extraterestre aflate la aproximativ 700 de ani-lumin\u0103 distan\u021b\u0103, gra\u021bie Telescopului Spa\u021bial James Webb (JWST). Cercet\u0103torii au identificat ap\u0103 semigrea (HDO) pe exoplaneta WASP-39b. Vestea vine \u00een contextul \u00een care &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Telescopul spa\u0163ial James Webb a descoperit ap\u0103 semigrea pe o exoplanet\u0103 situat\u0103 la 700 de ani-lumin\u0103 distan\u0163\u0103 fa\u0163\u0103 de noi\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/telescopul-spatial-james-webb-a-descoperit-apa-semigrea-pe-o-exoplaneta-situata-la-700-de-ani-lumina-distanta-fata-de-noi\/#more-103065\" aria-label=\"Cite\u0219te mai multe despre Telescopul spa\u0163ial James Webb a descoperit ap\u0103 semigrea pe o exoplanet\u0103 situat\u0103 la 700 de ani-lumin\u0103 distan\u0163\u0103 fa\u0163\u0103 de noi\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":103066,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[601,20652,102,2502,3460,1367,4570,3595,3417,17432,20651],"class_list":["post-103065","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-apa","tag-apa-semigrea","tag-astronomie","tag-atmosfera","tag-exoplaneta","tag-gravitatie","tag-infrarosu","tag-molecule","tag-sistem-solar","tag-telescopul-james-webb","tag-wasp-39b","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>Telescopul spa\u0163ial James Webb a descoperit ap\u0103 semigrea pe o exoplanet\u0103 situat\u0103 la 700 de ani-lumin\u0103 distan\u0163\u0103 fa\u0163\u0103 de noi - 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\/telescopul-spatial-james-webb-a-descoperit-apa-semigrea-pe-o-exoplaneta-situata-la-700-de-ani-lumina-distanta-fata-de-noi\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Telescopul spa\u0163ial James Webb a descoperit ap\u0103 semigrea pe o exoplanet\u0103 situat\u0103 la 700 de ani-lumin\u0103 distan\u0163\u0103 fa\u0163\u0103 de noi\" \/>\n<meta property=\"og:description\" content=\"O semn\u0103tur\u0103 chimic\u0103 rar\u0103 a fost detectat\u0103 \u00een atmosfera unei lumi extraterestre aflate la aproximativ 700 de ani-lumin\u0103 distan\u021b\u0103, gra\u021bie Telescopului Spa\u021bial James Webb (JWST). 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Cercet\u0103torii au identificat ap\u0103 semigrea (HDO) pe exoplaneta WASP-39b. Vestea vine \u00een contextul \u00een care ... 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