{"id":79224,"date":"2022-02-23T18:55:12","date_gmt":"2022-02-23T16:55:12","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=79224"},"modified":"2022-02-23T18:55:12","modified_gmt":"2022-02-23T16:55:12","slug":"noul-telescop-spatial-nasa-james-webb-ar-putea-detecta-viata-extraterestra-de-pe-exoplanetele-din-galaxia-noastra","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/noul-telescop-spatial-nasa-james-webb-ar-putea-detecta-viata-extraterestra-de-pe-exoplanetele-din-galaxia-noastra\/","title":{"rendered":"Noul telescop spa\u0163ial NASA James Webb ar putea detecta via\u0163\u0103 extraterestr\u0103 de pe exoplanetele din galaxia noastr\u0103"},"content":{"rendered":"<figure id=\"attachment_79225\" aria-describedby=\"caption-attachment-79225\" style=\"width: 325px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/02\/exoplaneta-3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-79225 size-full\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/02\/exoplaneta-3.jpg\" alt=\"\" width=\"335\" height=\"249\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/02\/exoplaneta-3.jpg 335w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/02\/exoplaneta-3-300x223.jpg 300w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/02\/exoplaneta-3-200x150.jpg 200w\" sizes=\"auto, (max-width: 335px) 100vw, 335px\" \/><\/a><figcaption id=\"caption-attachment-79225\" class=\"wp-caption-text\"><em><strong>Imagine:<\/strong><\/em> <a href=\"https:\/\/www.maxpixel.net\/Planet-Space-Exoplanet-Discovery-Sci-fi-6034210\" target=\"_blank\" rel=\"noopener\"><strong>maxpixel.net<\/strong><\/a> (Commons Creative &#8211; free)<\/figcaption><\/figure>\n<p>Telescopul spa\u021bial NASA James Webb (JWST), lansat \u00een decembrie 2021, se afl\u0103 acum \u00een proces de aliniere a oglinzilor sale pentru preg\u0103tirea func\u021bion\u0103rii. \u00cen c\u00e2teva luni, cel mai puternic telescop spa\u021bial construit vreodat\u0103 \u00ee\u0219i va pune ochii pe stele. Astronomii sper\u0103 c\u0103 ceea ce vede JWST va schimba modul \u00een care \u00een\u021belegem Universul nostru, a\u0219a cum a f\u0103cut telescopul spa\u021bial Hubble.<\/p>\n<p>O capacitate tentant\u0103 pe care JWST o ofer\u0103, pe care Hubble nu a putut-o, este oportunitatea de a vizualiza \u00een mod direct planetele care orbiteaz\u0103 \u00een jurul stelelor \u00eendep\u0103rtate \u0219i de a detecta semnele de via\u021b\u0103.<\/p>\n<p>Posibilitatea detect\u0103rii de la distan\u021b\u0103 a biosemn\u0103turilor a fost un subiect fierbinte \u00een ultimii ani. \u00cen propriul nostru sistem solar, recenta descoperire a fosfinei \u00een atmosfera lui Venus a st\u00e2rnit specula\u021bii c\u0103 substan\u021ba chimic\u0103 ar putea fi creat\u0103 de o form\u0103 de via\u021b\u0103 microbian\u0103. \u00cen mod similar, exper\u021bii \u00een teledetec\u021bie au propus c\u0103 via\u021ba vegetal\u0103 &#8211; care folose\u0219te fotosinteza pentru energie &#8211; ar putea fi detectat\u0103 \u00een unde infraro\u0219ii, deoarece clorofila absoarbe lumina vizibil\u0103, dar se arat\u0103 str\u0103lucitor \u00een infraro\u0219ii. O fotografie cu un singur pixel a unei planete \u00eendep\u0103rtate ar putea con\u021bine suficiente informa\u021bii pentru a ne spune dac\u0103 exist\u0103 via\u021b\u0103 biologic\u0103, pe baza informa\u021biilor stocate \u00een lungimile de und\u0103 ale luminii care ajung la lentila telescopului.<\/p>\n<p>Dar cum r\u0103m\u00e2ne cu via\u021ba inteligent\u0103? Ar putea JWST s\u0103 detecteze civiliza\u021bii asem\u0103n\u0103toare cu ale noastre? Cum le-am c\u0103uta? Cele mai bune r\u0103spunsuri vin din \u00een\u021belegerea cum arat\u0103 prezen\u021ba umanit\u0103\u021bii pe P\u0103m\u00e2nt din spa\u021biul cosmic. Noi eliber\u0103m c\u0103ldur\u0103 rezidual\u0103 (industrie \u0219i case) \u0219i lumin\u0103 artificial\u0103 noaptea, dar poate cel mai important este c\u0103 producem substan\u021be chimice care ne umplu atmosfera cu compu\u0219i care altfel nu ar fi prezen\u021bi. Ace\u0219ti constituen\u021bi atmosferici artificiali ar putea fi detecta\u0163i de un telescop puternic de c\u0103tre o civiliza\u0163ie extraterestr\u0103 din galaxia noastr\u0103.<\/p>\n<p>O lucrare recent\u0103 disponibil\u0103 pe <a href=\"https:\/\/arxiv.org\/abs\/2202.05858\" target=\"_blank\" rel=\"noopener\"><strong>ArXiv<\/strong><\/a> a examinat posibilitatea utiliz\u0103rii Telescopului spa\u021bial NASA James Webb pentru a c\u0103uta poluan\u021bi industriali \u00een atmosferele exoplanetelor. Lucrarea s-a concentrat \u00een special pe clorofluorocarburile (CFC), care, pe P\u0103m\u00e2nt, sunt produse industrial ca agen\u021bi frigorifici \u0219i agen\u021bi de cur\u0103\u021bare. CFC-urile au creat o gaur\u0103 masiv\u0103 \u00een stratul de ozon al P\u0103m\u00e2ntului \u00een anii 1980, \u00eenainte ca interzicerea interna\u021bional\u0103 a utiliz\u0103rii lor \u00een 1987 s\u0103 contribuie la reducerea nivelului de CFC \u00eenapoi la niveluri mai pu\u021bin d\u0103un\u0103toare. Ace\u0219ti agen\u021bi poluan\u0163i, cu efect de ser\u0103 \u015fi cu timpi lungi de reziden\u021b\u0103 \u00een atmosfer\u0103, dac\u0103 se g\u0103sesc \u00een alt\u0103 parte a galaxiei, sunt aproape siguri c\u0103 vor fi rezultatul unei civiliza\u021bii capabile de industrializare.<\/p>\n<p>Cu alte cuvinte, unele dintre cele mai rele produse secundare ale umanit\u0103\u021bii &#8211; poluarea noastr\u0103 &#8211; ne-ar putea face detectabili. \u0218i \u00eenseamn\u0103 c\u0103 am putea g\u0103si alte specii extraterestre capabile s\u0103 produc\u0103 o poluare asem\u0103n\u0103toare.<\/p>\n<p>\u00cens\u0103, exist\u0103 unele limit\u0103ri ale capabilit\u0103\u021bilor de g\u0103sire a CFC-urilor de c\u0103tre JWST. Dac\u0103 steaua-gazda a unei exoplanete este prea str\u0103lucitoare, ea va diminua semnalul. Un exemplu din apropiere este TRAPPIST-1, o stea pitic\u0103 ro\u0219ie aflat\u0103 la 40 de ani-lumin\u0103 distan\u021b\u0103, cu mai multe planete de dimensiunea P\u0103m\u00e2ntului, orbit\u00e2nd \u00een zona locuibil\u0103. JWST ar putea vedea CFC-uri de pe planetele lui TRAPPIST-1, deoarece steaua slab\u0103 nu va diminua CFC-urile \u00een acela\u0219i mod \u00een care ar face-o o stea str\u0103lucitoare, precum Soarele nostru (o stea de tip G). \u00cen schimb, un telescop asem\u0103n\u0103tor JWST, aflat \u00een sistemul stelar TRAPPIST-1 nu ar putea vedea CFC-urile P\u0103m\u00e2ntului &#8211; Soarele nostru este pur \u0219i simplu prea str\u0103lucitor.<\/p>\n<p><em><strong>Sursa<\/strong><\/em> (traducerea \u015fi adaptarea proprie): studiul de pe <a href=\"https:\/\/arxiv.org\/abs\/2202.05858\" target=\"_blank\" rel=\"noopener\"><strong>ArXiv<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Telescopul spa\u021bial NASA James Webb (JWST), lansat \u00een decembrie 2021, se afl\u0103 acum \u00een proces de aliniere a oglinzilor sale pentru preg\u0103tirea func\u021bion\u0103rii. \u00cen c\u00e2teva luni, cel mai puternic telescop spa\u021bial construit vreodat\u0103 \u00ee\u0219i va pune ochii pe stele. Astronomii &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Noul telescop spa\u0163ial NASA James Webb ar putea detecta via\u0163\u0103 extraterestr\u0103 de pe exoplanetele din galaxia noastr\u0103\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/noul-telescop-spatial-nasa-james-webb-ar-putea-detecta-viata-extraterestra-de-pe-exoplanetele-din-galaxia-noastra\/#more-79224\" aria-label=\"Cite\u0219te mai multe despre Noul telescop spa\u0163ial NASA James Webb ar putea detecta via\u0163\u0103 extraterestr\u0103 de pe exoplanetele din galaxia noastr\u0103\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":79225,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[102,2502,2671,3460,51,15,2826,433,4157,952,3725,105,732,354,3417,865,733,434,5025,17432,1087,1029,366],"class_list":["post-79224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-astronomie","tag-atmosfera","tag-caldura","tag-exoplaneta","tag-extraterestri","tag-fotografie","tag-fotosinteza","tag-galaxie","tag-infrarosii","tag-lumina","tag-ozon","tag-pamant","tag-planeta","tag-poluare","tag-sistem-solar","tag-soare","tag-stea","tag-telescop","tag-telescopul-hubble","tag-telescopul-james-webb","tag-univers","tag-venus","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>Noul telescop spa\u0163ial NASA James Webb ar putea detecta via\u0163\u0103 extraterestr\u0103 de pe exoplanetele din galaxia noastr\u0103 - 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\/noul-telescop-spatial-nasa-james-webb-ar-putea-detecta-viata-extraterestra-de-pe-exoplanetele-din-galaxia-noastra\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Noul telescop spa\u0163ial NASA James Webb ar putea detecta via\u0163\u0103 extraterestr\u0103 de pe exoplanetele din galaxia noastr\u0103\" \/>\n<meta property=\"og:description\" content=\"Telescopul spa\u021bial NASA James Webb (JWST), lansat \u00een decembrie 2021, se afl\u0103 acum \u00een proces de aliniere a oglinzilor sale pentru preg\u0103tirea func\u021bion\u0103rii. \u00cen c\u00e2teva luni, cel mai puternic telescop spa\u021bial construit vreodat\u0103 \u00ee\u0219i va pune ochii pe stele. 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Astronomii ... 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