{"id":100565,"date":"2025-10-29T17:32:47","date_gmt":"2025-10-29T14:32:47","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=100565"},"modified":"2025-10-29T17:32:47","modified_gmt":"2025-10-29T14:32:47","slug":"astronomii-au-descoperit-un-super-pamant-in-apropierea-noastra-galactica-iar-acesta-ar-putea-fi-vizibil-in-curand","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/astronomii-au-descoperit-un-super-pamant-in-apropierea-noastra-galactica-iar-acesta-ar-putea-fi-vizibil-in-curand\/","title":{"rendered":"Astronomii au descoperit un &#8222;Super P\u0103m\u00e2nt&#8221; \u00een apropierea noastr\u0103 galactic\u0103, iar acesta ar putea fi vizibil \u00een cur\u00e2nd"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/super-Pamant.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-100566\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/super-Pamant.jpg\" alt=\"\" width=\"364\" height=\"275\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/super-Pamant.jpg 364w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/super-Pamant-300x227.jpg 300w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/super-Pamant-200x150.jpg 200w\" sizes=\"auto, (max-width: 364px) 100vw, 364px\" \/><\/a>C\u00e2nd astronomii au \u00eendreptat pentru prima dat\u0103 spectograful <strong>Habitable-Zone Planet Finder<\/strong> (<strong>HPF<\/strong>) c\u0103tre steaua pitic\u0103 ro\u0219ie <strong>GJ 251<\/strong>, ace\u0219tia nu au observat dec\u00e2t mici schimb\u0103ri de culoare. Dup\u0103 mai bine de 20 de ani de m\u0103sur\u0103tori ale vitezei radiale, ei au descoperit ceva care a ie\u0219it \u00een eviden\u021b\u0103: o schimbare lent\u0103, odat\u0103 la 53,6 de zile, \u00een lumina stelei, datorit\u0103 unei planete cu o mas\u0103 de doar 4 ori mai mare dec\u00e2t cea a P\u0103m\u00e2ntului, \u015fi care orbiteaz\u0103 \u00een zona \u00een care apa ar putea r\u0103m\u00e2ne lichid\u0103. Aceast\u0103 planet\u0103, <strong>GJ 251 c<\/strong>, se afl\u0103 la doar 18 ani-lumin\u0103 distan\u021b\u0103, suficient de aproape \u00eenc\u00e2t telescoapele viitoare ar putea s\u0103 o fotografieze.<\/p>\n<p>Steaua gazd\u0103, GJ 251, se afl\u0103 \u00een constela\u0163ia Gemeni \u0219i str\u0103luce\u0219te la mai pu\u021bin de 2% din luminozitatea Soarelui. Este o stea pitic\u0103 M3 &#8211; un astru mic \u0219i rece &#8211; cu o temperatur\u0103 la suprafa\u021b\u0103 apropiat\u0103 de 3340K. Distan\u021ba sa de 5,58 parseci o face una dintre cele mai apropiate \u021binte pentru c\u0103ut\u0103rile de planete. Prima planet\u0103 descoperit\u0103 \u00een jurul ei, <strong>GJ 251 b<\/strong>, era deja cunoscut\u0103 din observa\u021biile anterioare, ea orbit\u00e2nd la fiecare 14 zile. Mai multe observatoare astronomice de pe P\u0103m\u00e2nt au produs aproape o mie de observa\u021bii pe parcursul a dou\u0103 decenii, pentru a fi observat\u0103 \u015fi cea de-a doua planet\u0103.<\/p>\n<p>GJ 251 c are o mas\u0103 minim\u0103 de 3,8 mase terestre \u0219i orbiteaz\u0103 la 0,196 unit\u0103\u021bi astronomice de steaua sa, aproximativ jum\u0103tate din distan\u021ba dintre Mercur \u0219i Soare. Temperatura sa de echilibru este de aproximativ 216 grade Kelvin, similar\u0103 cu cea a lui Marte. \u00cen jurul unei pitice reci precum GJ 251, acea orbit\u0103 se afl\u0103 chiar \u00een interiorul zonei locuibile. Planeta prime\u0219te probabil aproximativ 40% din lumina Soarelui pe care o prime\u0219te P\u0103m\u00e2ntul. Dac\u0103 ar avea o atmosfer\u0103 de ser\u0103 modest\u0103, ar putea exista ap\u0103 lichid\u0103 la suprafa\u021ba sa.<\/p>\n<p>Acest lucru face ca planeta s\u0103 fie valoroas\u0103 din punct de vedere \u0219tiin\u021bific dintr-un motiv pe care pu\u021bine altele \u00eel pot egala. La doar 18 ani-lumin\u0103 distan\u021b\u0103, distan\u021ba sa proiectat\u0103 fa\u021b\u0103 de stea pe cer este de 0,035 secunde de arc. Aceast\u0103 mic\u0103 diferen\u021b\u0103 este suficient de mare pentru ca observatoarele de genera\u021bie urm\u0103toare s\u0103 o poat\u0103 observa.<\/p>\n<p>GJ 251 c se al\u0103tur\u0103 unui grup foarte mic de &#8222;super P\u0103m\u00e2nturi&#8221; cunoscute care orbiteaz\u0103 \u00een zona de temperatur\u0103 potrivit\u0103 \u0219i sunt suficient de aproape pentru a fi studiate direct. Majoritatea exemplelor cunoscute, precum <strong>Proxima Centauri b<\/strong> sau <strong>Wolf 1069 b<\/strong>, se afl\u0103 \u00een emisfera sudic\u0103 sau \u00een jurul unor stele extrem de active, ceea ce complic\u0103 observarea. GJ 251, \u00een schimb, este lini\u0219tit\u0103 din punct de vedere magnetic. V\u00e2rsta sa de aproximativ 6,8 miliarde de ani sugereaz\u0103 c\u0103 orice atmosfer\u0103 ar fi avut timp s\u0103 se stabilizeze.<\/p>\n<p>Nimeni nu a fotografiat \u00eenc\u0103 planeta; dar, c\u00e2nd<strong> &#8222;Telescopul de 30 de Metri&#8221;<\/strong> sau <strong>&#8222;Telescopul Gigant Magellan&#8221;<\/strong> vor \u00eencepe s\u0103 func\u021bioneze la sf\u00e2r\u0219itul acestui deceniu, GJ 251 va fi printre primele lor \u021binte de imagistic\u0103.<\/p>\n<p>Dac\u0103 atmosfera sa poate fi observat\u0103, astronomii vor c\u0103uta amprente spectrale ale vaporilor de ap\u0103, dioxidului de carbon \u0219i metanului. Raporturile acestor gaze ar putea dezv\u0103lui dac\u0103 suprafa\u021ba planetei este \u00eenghe\u021bat\u0103, temperat\u0103 sau \u00eenvelit\u0103 la fel ca planet\u0103 Neptun. Modelele climatice sugereaz\u0103 deja c\u0103 o atmosfer\u0103 sub\u021bire de CO\u2082 ar putea men\u021bine temperaturile medii de suprafa\u021b\u0103 aproape de punctul de \u00eenghe\u021b al apei.<\/p>\n<p>Echipa din spatele studiului \u00ee\u0219i \u00eencheie raportul numind GJ 251 c drept <em>&#8222;cel mai bun candidat actual pentru imagistica direct\u0103 a unei planete terestre poten\u021bial locuibile din emisfera nordic\u0103&#8221;<\/em>. Este o afirma\u021bie modest\u0103, dar una care indic\u0103 urm\u0103torul pas \u00een \u0219tiin\u021ba exoplanetelor: nu doar detectarea lumilor \u00eendep\u0103rtate prin gravita\u021bia lor, ci chiar observarea lor.<\/p>\n<p><strong>Sursa:<\/strong> studiul \u015ftiin\u0163ific <a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/ae0e20\/pdf\" target=\"_blank\" rel=\"noopener\"><strong>&#8222;Discovery of a Nearby Habitable Zone Super-Earth Candidate Amenable to Direct Imaging&#8221; \/ iopscience.iop.org<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e2nd astronomii au \u00eendreptat pentru prima dat\u0103 spectograful Habitable-Zone Planet Finder (HPF) c\u0103tre steaua pitic\u0103 ro\u0219ie GJ 251, ace\u0219tia nu au observat dec\u00e2t mici schimb\u0103ri de culoare. Dup\u0103 mai bine de 20 de ani de m\u0103sur\u0103tori ale vitezei radiale, ei &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Astronomii au descoperit un &#8222;Super P\u0103m\u00e2nt&#8221; \u00een apropierea noastr\u0103 galactic\u0103, iar acesta ar putea fi vizibil \u00een cur\u00e2nd\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/astronomii-au-descoperit-un-super-pamant-in-apropierea-noastra-galactica-iar-acesta-ar-putea-fi-vizibil-in-curand\/#more-100565\" aria-label=\"Cite\u0219te mai multe despre Astronomii au descoperit un &#8222;Super P\u0103m\u00e2nt&#8221; \u00een apropierea noastr\u0103 galactic\u0103, iar acesta ar putea fi vizibil \u00een cur\u00e2nd\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":100566,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[601,7396,102,2502,103,356,3460,20315,20313,20314,1367,20316,952,156,2708,1579,2709,4216,105,732,18197,865,20312,733,8271,17476,434,20311,20310,2358,20309],"class_list":["post-100565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-apa","tag-astronomi","tag-astronomie","tag-atmosfera","tag-constelatie","tag-dioxid-de-carbon","tag-exoplaneta","tag-gj-251","tag-gj-251-b","tag-gj-251-c","tag-gravitatie","tag-hpf","tag-lumina","tag-marte","tag-mercur","tag-metan","tag-neptun","tag-orbita","tag-pamant","tag-planeta","tag-proxima-centauri-b","tag-soare","tag-spectograf","tag-stea","tag-stea-pitica-rosie","tag-super-pamant","tag-telescop","tag-telescopul-de-30-de-metri","tag-telescopul-gigant-magellan","tag-temperatura","tag-wolf-1069-b","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>Astronomii au descoperit un &quot;Super P\u0103m\u00e2nt&quot; \u00een apropierea noastr\u0103 galactic\u0103, iar acesta ar putea fi vizibil \u00een cur\u00e2nd - 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\/astronomii-au-descoperit-un-super-pamant-in-apropierea-noastra-galactica-iar-acesta-ar-putea-fi-vizibil-in-curand\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Astronomii au descoperit un &quot;Super P\u0103m\u00e2nt&quot; \u00een apropierea noastr\u0103 galactic\u0103, iar acesta ar putea fi vizibil \u00een cur\u00e2nd\" \/>\n<meta property=\"og:description\" content=\"C\u00e2nd astronomii au \u00eendreptat pentru prima dat\u0103 spectograful Habitable-Zone Planet Finder (HPF) c\u0103tre steaua pitic\u0103 ro\u0219ie GJ 251, ace\u0219tia nu au observat dec\u00e2t mici schimb\u0103ri de culoare. 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