{"id":83839,"date":"2022-12-22T22:32:06","date_gmt":"2022-12-22T20:32:06","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=83839"},"modified":"2022-12-22T22:32:06","modified_gmt":"2022-12-22T20:32:06","slug":"arrakhis-va-descoperi-tainele-materiei-intunecate-cea-mai-putin-cunoscuta-componenta-din-univers","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/arrakhis-va-descoperi-tainele-materiei-intunecate-cea-mai-putin-cunoscuta-componenta-din-univers\/","title":{"rendered":"Arrakhis va descoperi tainele materiei \u00eentunecate, cea mai pu\u0163in cunoscut\u0103 component\u0103 din Univers"},"content":{"rendered":"<figure id=\"attachment_83840\" aria-describedby=\"caption-attachment-83840\" style=\"width: 358px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/materie-intunecata-7.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-83840\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/materie-intunecata-7.jpg\" alt=\"\" width=\"368\" height=\"246\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/materie-intunecata-7.jpg 368w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/12\/materie-intunecata-7-300x201.jpg 300w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><\/a><figcaption id=\"caption-attachment-83840\" class=\"wp-caption-text\"><strong>Imagine:<\/strong> <a href=\"https:\/\/www.flickr.com\/photos\/mualphachi\/20908548189\" target=\"_blank\" rel=\"noopener\"><strong>flickr.com<\/strong><\/a> (Commons Creative &#8211; free)<\/figcaption><\/figure>\n<p>Agen\u021bia Spa\u021bial\u0103 European\u0103 (ESA) a anun\u021bat recent o nou\u0103 misiune a programului s\u0103u \u0219tiin\u021bific: un mic telescop care orbiteaz\u0103 \u00een jurul P\u0103m\u00e2ntului, numit Arrakhis. Dar, de\u0219i numele s\u0103u este inspirat din romanul SF <strong><em>&#8222;Dune&#8221;<\/em><\/strong>, el nu va c\u0103uta viermi de nisip sau alte lucruri pe o planet\u0103 pustie, ci va \u00eencerca s\u0103 urm\u0103reasc\u0103 una dintre cele mai evazive \u0219i mai misterioase substan\u021be din Univers: materia \u00eentunecat\u0103. Acesta este termenul dat materiei ipotetice invizibile despre care se crede c\u0103 este mai abundent\u0103 dec\u00e2t materia normal\u0103 \u0219i are un efect gravita\u021bional similar asupra mediului cosmic.<\/p>\n<p>Deoarece materia \u00eentunecat\u0103 \u00eenc\u0103 scap\u0103 de detectare, misiunea va viza surse de lumin\u0103 care sunt sensibile la ea. Oamenii de \u015ftiin\u0163\u0103 se a\u0219teapt\u0103 ca materia normal\u0103 &#8211; cea care emite lumin\u0103, cum ar fi stelele din galaxii &#8211; s\u0103 se mi\u0219te \u00een principal sub influen\u021ba materiei \u00eentunecate, care este mai abundent\u0103. Cercet\u0103torii cred c\u0103 galaxii \u00eentregi sunt mutate dintr-o parte \u00een alta de materia \u00eentunecat\u0103, ca ni\u0219te faruri r\u0103sp\u00e2ndite pe un ocean invizibil. Naviga\u021bia lor este \u00eens\u0103 aleatorie, deoarece se crede c\u0103 materia \u00eentunecat\u0103 este distribuit\u0103 neuniform \u00een Univers, form\u00e2nd o &#8222;p\u00e2nz\u0103 cosmic\u0103&#8221; pe distan\u021be mari \u0219i av\u00e2nd un aspect mai aglomerat la scara galaxiilor. Unele dintre aceste aglomer\u0103ri ar trebui s\u0103 fie populate cu galaxii mici numite galaxii pitice, \u00een timp ce altele ar fi formate \u00een \u00eentregime din materie \u00eentunecat\u0103.<\/p>\n<p>Exist\u0103, de asemenea, resturi r\u0103mase de la acele galaxii pitice care se aventureaz\u0103 prea aproape de galaxiile gazd\u0103 pe care le orbiteaz\u0103. Pe m\u0103sur\u0103 ce materia \u00eentunecat\u0103 din jur sf\u00e2\u0219ie aceste galaxii prin &#8222;maree gravita\u021bionale&#8221;, ele \u00eencep s\u0103 se desprind\u0103 \u00een fluxuri lungi de stele care se \u00eenf\u0103\u0219oar\u0103 \u00een zone vaste de spa\u021biu. Aceste v\u0103luri sub\u021biri de lumin\u0103 sunt o alt\u0103 leg\u0103tur\u0103 cu nev\u0103zutul. Num\u0103r\u00e2nd \u0219i m\u0103sur\u00e2nd formele lor, putem deduce din ce tip de particule de materie \u00eentunecat\u0103 este f\u0103cut\u0103 &#8211; \u0219i \u00een cele din urm\u0103 care model cosmologic este cel mai precis.<\/p>\n<p>\u00cen modelul standard cosmologic, se presupune c\u0103 particulele de materie \u00eentunecat\u0103 sunt grele \u0219i se mi\u0219c\u0103 lent. Acest lucru implic\u0103 faptul c\u0103 galaxia Calea Lactee con\u021bine sute de aglomer\u0103ri de materie \u00eentunecat\u0103, dintre care unele vor con\u021bine galaxii pitice. Un alt model presupune c\u0103 particulele materiei \u00eentunecate sunt mult mai u\u0219oare \u0219i mai rapide, ceea ce \u00eenseamn\u0103 mai pu\u021bine aglomera\u021bii pentru \u00eenceput.<\/p>\n<p>Observa\u021biile cosmice ne pot oferi un indiciu final asupra modelului potrivit, dar pentru a ajunge acolo, avem nevoie mai \u00eent\u00e2i de un recens\u0103m\u00e2nt precis al galaxiilor pitice care orbiteaz\u0103 Calea Lactee. Dar problema este c\u0103 vedem doar c\u00e2teva zeci de galaxii pitice \u00een jurul nostru, ceea ce este foarte derutant. Ar putea \u00eensemna c\u0103 majoritatea acestor aglomer\u0103ri sunt formate din materie \u00eentunecat\u0103.<\/p>\n<p>Exist\u0103 \u00eens\u0103 indicii c\u0103 galaxiile pitice descoperite p\u00e2n\u0103 acum \u00een apropierea Calei Lactee sau alte galaxii mari sunt doar v\u00e2rful aisbergului \u0219i c\u0103 multe altele r\u0103m\u00e2n ascunse \u00een spatele luminii puternice din fa\u0163\u0103. Observarea acestei lumini slabe a stelelor s-a dovedit a fi o provocare chiar \u0219i pentru cele mai mari telescoape de pe P\u0103m\u00e2nt, deoarece necesit\u0103 imagini foarte profunde \u0219i supravegherea unor por\u021biuni mari de cer. \u00cen plus, atmosfera P\u0103m\u00e2ntului este o piedic\u0103. Arrakhis va observa din spa\u021biul cosmic, cu o camer\u0103 inovatoare care sondeaz\u0103 mai ad\u00e2nc at\u00e2t \u00een \u200b\u200bpartea optic\u0103, c\u00e2t \u0219i \u00een cea \u00een infraro\u0219u.<\/p>\n<p>Cele o sut\u0103 de sisteme asem\u0103n\u0103toare C\u0103ii Lactee care vor fi observate se afl\u0103 la aproximativ 100 de milioane de ani-lumin\u0103 distan\u021b\u0103, unde au fost descoperite p\u00e2n\u0103 acum doar c\u00e2teva galaxii pitice \u0219i niciun flux stelar \u00eenc\u0103. C\u00e2nd \u0219tim num\u0103rul de galaxii pitice ce vor fi descoperite \u00een cur\u00e2nd \u0219i cum vor fi v\u0103zute acestea distribuite \u00een spa\u021biu, ar trebui s\u0103 putem stabili modelul cosmologic corect.<\/p>\n<p>Arrakhis va g\u0103si multe dintre piesele lips\u0103 din puzzle-ul pe care \u00eel ofer\u0103 materia \u00eentunecat\u0103.<\/p>\n<p><strong>Sursa<\/strong> (traducerea \u015fi adaptarea proprie): <a href=\"https:\/\/theconversation.com\/arrakhis-the-tiny-satellite-aiming-to-reveal-what-dark-matter-is-made-of-194839\" target=\"_blank\" rel=\"noopener\"><strong>theconversation.com<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Agen\u021bia Spa\u021bial\u0103 European\u0103 (ESA) a anun\u021bat recent o nou\u0103 misiune a programului s\u0103u \u0219tiin\u021bific: un mic telescop care orbiteaz\u0103 \u00een jurul P\u0103m\u00e2ntului, numit Arrakhis. Dar, de\u0219i numele s\u0103u este inspirat din romanul SF &#8222;Dune&#8221;, el nu va c\u0103uta viermi de &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Arrakhis va descoperi tainele materiei \u00eentunecate, cea mai pu\u0163in cunoscut\u0103 component\u0103 din Univers\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/arrakhis-va-descoperi-tainele-materiei-intunecate-cea-mai-putin-cunoscuta-componenta-din-univers\/#more-83839\" aria-label=\"Cite\u0219te mai multe despre Arrakhis va descoperi tainele materiei \u00eentunecate, cea mai pu\u0163in cunoscut\u0103 component\u0103 din Univers\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":83840,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[3922,18025,102,1405,18024,433,18026,952,345,1809,6790,2174,3175,434,1087],"class_list":["post-83839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-agentia-spatiala-europeana","tag-arrakhis","tag-astronomie","tag-calea-lactee","tag-dune","tag-galaxie","tag-galaxie-pitica","tag-lumina","tag-materie","tag-materie-intunecata","tag-particule","tag-sf","tag-stele","tag-telescop","tag-univers","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>Arrakhis va descoperi tainele materiei \u00eentunecate, cea mai pu\u0163in cunoscut\u0103 component\u0103 din Univers - 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\/arrakhis-va-descoperi-tainele-materiei-intunecate-cea-mai-putin-cunoscuta-componenta-din-univers\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arrakhis va descoperi tainele materiei \u00eentunecate, cea mai pu\u0163in cunoscut\u0103 component\u0103 din Univers\" \/>\n<meta property=\"og:description\" content=\"Agen\u021bia Spa\u021bial\u0103 European\u0103 (ESA) a anun\u021bat recent o nou\u0103 misiune a programului s\u0103u \u0219tiin\u021bific: un mic telescop care orbiteaz\u0103 \u00een jurul P\u0103m\u00e2ntului, numit Arrakhis. 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Dar, de\u0219i numele s\u0103u este inspirat din romanul SF &#8222;Dune&#8221;, el nu va c\u0103uta viermi de ... 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