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{"id":2051778,"date":"2016-07-25T10:18:53","date_gmt":"2016-07-25T10:18:53","guid":{"rendered":"https:\/\/romfilatelia.ro\/romagazin\/produs\/istoria-astronomiei\/"},"modified":"2021-02-11T09:23:37","modified_gmt":"2021-02-11T09:23:37","slug":"istoria-astronomiei","status":"publish","type":"product","link":"https:\/\/romfilatelia.ro\/romagazin\/?product=istoria-astronomiei","title":{"rendered":"ISTORIA ASTRONOMIEI"},"content":{"rendered":"

\"Print\"<\/a>950 DE ANI DE LA TRECEREA COMETEI HALLEY OBSERVAT\u0102 \u00ceN 1066<\/p>\n

Istoria astronomiei este istoria \u015ftiin\u0163ei care studiaz\u0103 corpurile cere\u015fti, de la simpla observa\u0163ie \u015fi p\u00e2n\u0103 la teoriidespre univers. Astronomia include studiul planetelor \u015fi al sateli\u0163ilor acestora, cometelor, meteori\u0163ilor, stelelor, g\u0103urilor negre, sistemelor solare \u015fi galaxiilor.<\/p>\n

Prezenta emisiune de m\u0103rci po\u015ftale, reprezint\u0103 un supratipar al coli\u0163ei emisiunii \u00centoarcerea Cometei Halley, din anul 1986<\/em><\/strong>.<\/p>\n

Curiozitatea popoarelor din Antichitate asupra fenomenelor astronomice a f\u0103cut ca acestea s\u0103 studieze cerul \u015fi s\u0103 \u00een\u0163eleag\u0103 formarea zilei \u015fi a nop\u0163ii, rolul Soarelui \u015fi al Lunii \u00een m\u0103surarea timpului \u015fi anotimpurilor. Popoarele antice au observat c\u0103 obiectele cere\u015fti au un comportament regulat, acesta ajut\u00e2nd la m\u0103surarea timpului, form\u00e2nd zile, s\u0103pt\u0103m\u00e2ni, luni \u015fi ani.<\/p>\n

Unele dintre cele cele mai vechi m\u0103rturii despre importan\u0163a pe care o d\u0103deau oamenii cerului le avem din Sumer, insulele Britanice, Egipt sau Maya. Aceste popula\u0163ii au ar\u0103tat un interes major \u00een ceea ce prive\u015fte crearea de sanctuare astronomice de unde puteau urm\u0103ri \u015fi m\u0103sura r\u0103s\u0103ritul unor stele, ca Sirius<\/em>, sau planete, ca Venus<\/em> \u015fi Mercur<\/em>.<\/p>\n

Cometa Halley<\/em><\/strong> este cea mai faimoas\u0103 dintre cometele periodice, put\u00e2nd fi v\u0103zut\u0103 aproximativ la fiecare 75 – 76 de ani. Cometa a c\u0103p\u0103tat numele astronomului englez Edmond Halley, care, aplic\u00e2nd teoria gravita\u0163ional\u0103 a lui Newton \u015fi lu\u00e2nd \u00een calcul efectele gravita\u0163ionale ale lui Jupiter<\/em> \u015fi Saturn<\/em>, a reu\u015fit s\u0103 stabileasc\u0103 data aproximativ\u0103 a urm\u0103toarei re\u00eentoarceri a cometei.<\/p>\n

Nu s-a putut calcula cu exactitate de c\u00e2nd este v\u0103zut\u0103 cometa Halley, primele men\u0163iuni fiind f\u0103cute \u00eens\u0103 de chinezi, \u00een 611 \u00ee. Hr.; aceasta a mai fost observat\u0103 \u015fi \u00een 467 \u00ee. Hr. \u015fi 240 \u00ee. Hr.<\/p>\n

Din anul 240 \u00ee. Hr. \u015fi p\u00e2n\u0103 \u00een prezent, cometa a fost observat\u0103 de aproximativ 30 de ori, urm\u0103toarea sa apari\u0163ie fiind estimat\u0103 \u00een anul 2061. For\u0163a gravita\u0163ional\u0103 a planetelor altereaz\u0103 perioada orbital\u0103 de la o revolu\u0163ie la alta. Efecte non-gravita\u0163ionale, precum reac\u0163ia la explozia gazelor care se \u00eenc\u0103lzesc atunci c\u00e2nd corpul ceresc trece pe l\u00e2ng\u0103 Soare, joac\u0103 de asemenea un rol important \u00een modificarea orbitei.<\/p>\n

Halley face parte din categoria cometelor de scurt\u0103 perioad\u0103. Cometele de acest tip au, \u00een medie, \u00eenclina\u0163ia fa\u0163\u0103 de elips\u0103 de numai zece grade, iar perioada orbital\u0103 de doar 6,5 ani, ceea ce face orbita cometei Halley atipic\u0103. Acest lucru sugereaz\u0103 c\u0103 Halley a fost ini\u0163ial o comet\u0103 de lung\u0103 perioad\u0103, a c\u0103rei orbit\u0103 a fost perturbat\u0103 de for\u0163a gravita\u0163ional\u0103 a planetelor gigant, de apropierea periodic\u0103 de Soare \u015fi trimis\u0103 \u00een interiorul sistemului solar.<\/p>\n

Una din cele mai celebre treceri, consemnat\u0103 pe nu mai pu\u0163in celebra tapiserie de la Bayeux, a fost \u00een 1066, c\u00e2nd a uimit armata lui William Cuceritorul; de atunci au trecut, a\u015fadar, nu mai pu\u0163in de 950 de ani.<\/p>\n

Tapiseria de la Bayeux este o p\u00e2nz\u0103 brodat\u0103 de aproape 70 de metri lungime care descrie evenimentele care au dus la cucerirea normand\u0103 a Angliei de c\u0103tre William, Duce al Normandiei (mai t\u00e2rziu rege al Angliei) \u015fi luptele sale cu Harold al II-lea al Angliei, culmin\u00e2nd cu B\u0103t\u0103lia de la Hastings. Tapiseria este format\u0103 din 50 de scene, cu titluri latine, brodate cu fire de l\u00e2n\u0103 colorate pe p\u00e2nz\u0103. Cometa Halley, care \u015fi-a f\u0103cut apari\u0163ia pe cerul Angliei \u00een 1066, este \u00eenf\u0103\u0163i\u015fat\u0103 pe cel de-al 32-lea tablou al Tapiseriei de la Bayeux, privit\u0103 fiind de Regele Harold al II-lea, \u00eenainte de B\u0103t\u0103lia de la Hastings.<\/p>\n

O poveste interesant\u0103 despre cometa Halley este legat\u0103 \u015fi de destinul scriitorului american Mark Twain, care s-a n\u0103scut\u00een 1835, la dou\u0103 s\u0103pt\u0103m\u00e2ni dup\u0103 trecerea cometei. \u00cen 1909,Mark Twain scria \u00een autobiografie c\u0103 a venit o dat\u0103 cu cometa \u015fi va pleca o dat\u0103 cu ea. \u015ei a plecat \u00een aprilie 1910.<\/p>\n

Nu mai pu\u0163in celebr\u0103 a fost ultima ei trecere, \u00een 1986, fiind prima comet\u0103 survolat\u0103 de o misiune spa\u0163ial\u0103, \u015fi anume de Giotto<\/em> \u015fi Vega<\/em>.<\/p>\n

 <\/p>\n

Romfilatelia mul\u0163ume\u015fte Institutului Astronomic al Academiei Rom\u00e2ne pentru sprijinul documentar acordat \u00een realizarea acestei emisiuni de m\u0103rci po\u015ftale. <\/em><\/strong><\/p>\n

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950 DE ANI DE LA TRECEREA COMETEI HALLEY OBSERVAT\u0102 \u00ceN 1066 Istoria astronomiei este istoria \u015ftiin\u0163ei care studiaz\u0103 corpurile cere\u015fti, […]<\/p>\n","protected":false},"featured_media":2051779,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"product_cat":[2675,2618],"product_tag":[],"class_list":{"0":"post-2051778","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-2675","7":"product_cat-colectii-anuale","8":"desktop-align-left","9":"tablet-align-left","10":"mobile-align-left","12":"first","13":"instock","14":"featured","15":"taxable","16":"shipping-taxable","17":"product-type-grouped","18":"add-to-wishlist-before_image"},"_links":{"self":[{"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=\/wp\/v2\/product\/2051778"}],"collection":[{"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=\/wp\/v2\/media\/2051779"}],"wp:attachment":[{"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2051778"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=2051778"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/romfilatelia.ro\/romagazin\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=2051778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}