\nMajoritatea componentelor ar fi trebuit s\u0103 se dezintegreze la reintrare, \u00eens\u0103 agen\u0163ia spa\u0163ial\u0103 american\u0103 a avertizat c\u0103 unele fragmente ar fi putut ajunge pe P\u0103m\u00e2nt.<\/p>\n
\nSonda care a reintrat \u00een atmosfer\u0103 este Van Allen Probe A. Ea a fost lansat\u0103 de NASA \u00een 2012 pentru a studia centurile de radia\u0163ii Van Allen. Acestea sunt dou\u0103 regiuni de particule energetice capturate de c\u00e2mpul magnetic al P\u0103m\u00e2ntului. Potrivit datelor prezentate de NASA \u015fi de For\u0163a Spa\u0163ial\u0103 a SUA, sonda a reintrat \u00een atmosfer\u0103 la ora 6:37 ET deasupra Pacificului ecuatorial, \u00eentr-o zon\u0103 situat\u0103 la sud de Mexic \u015fi la vest de Ecuador, scrie CNN.<\/p>\n
\nNu este clar dac\u0103 fragmente ale vehiculului au supravie\u0163uit reintr\u0103rii. P\u00e2n\u0103 acum nu au fost raportate victime sau martori ai unor resturi c\u0103zute pe P\u0103m\u00e2nt.<\/p>\n
\nNASA a estimat c\u0103 probabilitatea ca o bucat\u0103 de resturi spa\u0163iale s\u0103 loveasc\u0103 o persoan\u0103 era de aproximativ 1 la 4.200. Speciali\u015ftii spun c\u0103 riscul r\u0103m\u00e2ne redus, chiar dac\u0103 este mai mare dec\u00e2t \u00een alte cazuri de reintrare a unor obiecte spa\u0163iale. \u201eAu existat reintr\u0103ri cu probabilitate de 1 la 1.000 \u015fi nu s-a \u00eent\u00e2mplat nimic. Dac\u0103 avem unele de 1 la 4.000 sau 5.000, nu este o zi rea pentru omenire\u201d, a declarat Darren McKnight, expert \u00een monitorizarea obiectelor spa\u0163iale.<\/p>\n
\nVan Allen Probe A a fost lansat\u0103 \u00eempreun\u0103 cu o sond\u0103 geam\u0103n\u0103 pentru a analiza centurile de radia\u0163ii care protejeaz\u0103 planeta de radia\u0163iile cosmice, furtunile solare \u015fi v\u00e2ntul solar. Misiunea a realizat mai multe descoperiri importante, inclusiv identificarea unei a treia centuri temporare de radia\u0163ii. Aceasta apare doar \u00een perioadele de activitate solar\u0103 intens\u0103.<\/p>\n
\nDe\u015fi misiunea era planificat\u0103 ini\u0163ial pentru doi ani, sondele au func\u0163ionat mult mai mult. Ele \u015fi-au \u00eencheiat activitatea abia \u00een 2019, dup\u0103 ce au r\u0103mas f\u0103r\u0103 combustibil.<\/p>\n
\nIni\u0163ial, NASA estima c\u0103 sonda va reintra \u00een atmosfer\u0103 abia \u00een 2034. \u00cens\u0103 activitatea solar\u0103 mai intens\u0103 dec\u00e2t se anticipase a crescut frecarea atmosferic\u0103 asupra vehiculului, acceler\u00e2nd cobor\u00e2rea acestuia din orbit\u0103. \u00cen 2024, Soarele a atins maximumul ciclului solar, ceea ce a generat fenomene de \u201evreme spa\u0163ial\u0103\u201d mai intense. A contribuit astfel la reintrarea prematur\u0103 a sondei. Sonda geam\u0103n\u0103, Van Allen Probe B, ar urma la r\u00e2ndul ei s\u0103 ias\u0103 din orbit\u0103 \u00eenainte de 2030.<\/p>\n
\nExper\u0163ii avertizeaz\u0103 c\u0103 problema resturilor spa\u0163iale devine tot mai important\u0103 pe m\u0103sur\u0103 ce num\u0103rul sateli\u0163ilor \u015fi al lans\u0103rilor cre\u015fte. Potrivit speciali\u015ftilor, aproximativ un obiect spa\u0163ial reintr\u0103 \u00een atmosfer\u0103 \u00een fiecare s\u0103pt\u0103m\u00e2n\u0103, iar uneori fragmente pot ajunge pe P\u0103m\u00e2nt.<\/p>\n
\nUn caz recent a avut loc \u00een 2024, c\u00e2nd o bucat\u0103 de echipament de pe Sta\u0163ia Spa\u0163ial\u0103 Interna\u0163ional\u0103 a supravie\u0163uit reintr\u0103rii \u00een atmosfer\u0103 \u015fi a str\u0103puns acoperi\u015ful unei case din Florida.<\/p>\n
\n <\/p>\n","protected":false},"excerpt":{"rendered":"
O sond\u0103 spa\u0163ial\u0103 NASA cu o greutate de aproximativ 600 de kilograme a reintrat necontrolat \u00een atmosfera P\u0103m\u00e2ntului miercuri diminea\u0163\u0103, cu ani mai devreme dec\u00e2t era estimat ini\u0163ial.<\/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":[19120,12873],"class_list":["post-245999","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-atmosfera","tag-sonda"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/245999","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=245999"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/245999\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=245999"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=245999"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=245999"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}