\n\u00cen iunie 2024, astronomii care foloseau radiotelescopul Australian Square Kilometer Array Pathfinder (ASKAP) au interceptat un semnal radio extrem de puternic, provenit din galaxia noastr\u0103, un eveniment neobi\u015fnuit \u00eentruc\u00e2t astfel de explozie radio misterioas\u0103 se \u00eenregistreaz\u0103 de obicei din galaxii \u00eendep\u0103rtate. Dur\u00e2nd doar 30 de nanosecunde, pulsul a dep\u0103\u015fit \u00een intensitate toate celelalte semnale detectate la acel moment, scrie Science Alert.<\/p>\n
\nCercet\u0103torii au stabilit c\u0103 semnalul provenea de la Relay 2, un satelit NASA lansat \u00een 1964 \u015fi scos din func\u0163iune \u00een 1967. De\u015fi nu exist\u0103 nicio dovad\u0103 c\u0103 sistemele satelitului ar fi emis inten\u0163ionat semnalul, dou\u0103 ipoteze au fost formulate: impactul cu un micrometeorit sau un eveniment de desc\u0103rcare electrostatic\u0103 (electrostatic discharge \u2013 ESD).<\/p>\n
\n\u201eAcest impuls radio a fost at\u00e2t de intens \u00eenc\u00e2t nici m\u0103car ASKAP nu a reu\u015fit s\u0103-l focalizeze corect. Ne-am g\u00e2ndit ini\u0163ial c\u0103 am descoperit un nou pulsar\u201d, a declarat dr. Clancy James de la Curtin University din Australia.<\/p>\n
\nIpoteza cea mai plauzibil\u0103, conform cercet\u0103rii \u00eenc\u0103 nepeer-review-ate publicate pe serverul arXiv, este c\u0103 un fenomen ESD a generat semnalul. Sateli\u0163ii construi\u0163i \u00een primele etape ale explor\u0103rii spa\u0163iale, precum Relay 2, sunt susceptibili acumul\u0103rii de sarcini electrice, din cauza materialelor utilizate la acea vreme.<\/p>\n
\nSpeciali\u015ftii consider\u0103 c\u0103 astfel de evenimente pot deschide noi perspective privind comportamentul de\u015feurilor spa\u0163iale \u015fi riscurile asociate. Karen Aplin, profesor de \u015ftiin\u0163e spa\u0163iale la University of Bristol, afirm\u0103 c\u0103 detectarea unor desc\u0103rc\u0103ri electrostatice de la sateli\u0163i mor\u0163i ar putea deveni o metod\u0103 important\u0103 pentru studiul mediului spa\u0163ial.<\/p>\n","protected":false},"excerpt":{"rendered":"
Un semnal radio puternic \u015fi nea\u015fteptat, detectat \u00een iunie 2024, ar putea proveni de la un satelit NASA dezafectat de aproape 60 de ani. O echip\u0103 de cercet\u0103tori australieni investigheaz\u0103 sursa misterioas\u0103, care pune sub semnul \u00eentreb\u0103rii cuno\u015ftin\u0163ele actuale despre electrostatica sateli\u0163ilor.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[347,7720,9571],"class_list":["post-237877","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-nasa","tag-satelit","tag-semnal"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/237877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=237877"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/237877\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=237877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=237877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=237877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}