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href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_it.wikipedia.org&uselang=it" class=""><span>Fai una donazione</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:CreaUtenza&returnto=Meridiano" title="Si consiglia di registrarsi e di effettuare l'accesso, anche se non è obbligatorio" class=""><span>registrati</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:Entra&returnto=Meridiano" title="Si consiglia di effettuare l'accesso, anche se non è obbligatorio [o]" accesskey="o" class=""><span>entra</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" 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class="vector-menu-heading"> Pagine per utenti anonimi <a href="/wiki/Aiuto:Benvenuto" aria-label="Ulteriori informazioni sulla contribuzione"><span>ulteriori informazioni</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Speciale:MieiContributi" title="Un elenco delle modifiche fatte da questo indirizzo IP [y]" accesskey="y"><span>contributi</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciale:MieDiscussioni" title="Discussioni sulle modifiche fatte da questo indirizzo IP [n]" accesskey="n"><span>discussioni</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Sito"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Indice" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indice</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Descrizione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Descrizione"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Descrizione</span> </div> </a> <ul id="toc-Descrizione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Storia_della_misura_del_meridiano_terrestre" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Storia_della_misura_del_meridiano_terrestre"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Storia della misura del meridiano terrestre</span> </div> </a> <ul id="toc-Storia_della_misura_del_meridiano_terrestre-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Meridiano</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 82 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-82" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">82 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Meridiaan" title="Meridiaan - afrikaans" lang="af" hreflang="af" data-title="Meridiaan" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AE%D8%B7_%D8%B7%D9%88%D9%84" title="خط طول - arabo" lang="ar" hreflang="ar" data-title="خط طول" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Meridianu" title="Meridianu - asturiano" lang="ast" hreflang="ast" data-title="Meridianu" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%AE%E0%A4%A7%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%B9%E0%A5%8D%E0%A4%A8_%E0%A4%B0%E0%A5%87%E0%A4%96%E0%A4%BE" title="मध्याह्न रेखा - awadhi" lang="awa" hreflang="awa" data-title="मध्याह्न रेखा" data-language-autonym="अवधी" data-language-local-name="awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Meridian" title="Meridian - azerbaigiano" lang="az" hreflang="az" data-title="Meridian" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%86%D8%B5%D9%81%E2%80%8C%D8%A7%D9%84%D9%86%D9%87%D8%A7%D8%B1" title="نصف‌النهار - South Azerbaijani" lang="azb" hreflang="azb" data-title="نصف‌النهار" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - baschiro" lang="ba" hreflang="ba" data-title="Меридиан" data-language-autonym="Башҡортса" data-language-local-name="baschiro" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D1%8B%D0%B4%D1%8B%D1%8F%D0%BD" title="Мерыдыян - bielorusso" lang="be" hreflang="be" data-title="Мерыдыян" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9C%D1%8D%D1%80%D1%8B%D0%B4%D1%8B%D1%8F%D0%BD" title="Мэрыдыян - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Мэрыдыян" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - bulgaro" lang="bg" hreflang="bg" data-title="Меридиан" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A6%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%98%E0%A6%BF%E0%A6%AE%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%96%E0%A6%BE" title="দ্রাঘিমারেখা - bengalese" lang="bn" hreflang="bn" data-title="দ্রাঘিমারেখা" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Meridi%C3%A0" title="Meridià - catalano" lang="ca" hreflang="ca" data-title="Meridià" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Poledn%C3%ADk" title="Poledník - ceco" lang="cs" hreflang="cs" data-title="Poledník" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - ciuvascio" lang="cv" hreflang="cv" data-title="Меридиан" data-language-autonym="Чӑвашла" data-language-local-name="ciuvascio" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Meridian_(Geographie)" title="Meridian (Geographie) - tedesco" lang="de" hreflang="de" data-title="Meridian (Geographie)" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dsb mw-list-item"><a href="https://dsb.wikipedia.org/wiki/Meridian_(geografija)" title="Meridian (geografija) - basso sorabo" lang="dsb" hreflang="dsb" data-title="Meridian (geografija)" data-language-autonym="Dolnoserbski" data-language-local-name="basso sorabo" class="interlanguage-link-target"><span>Dolnoserbski</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9C%CE%B5%CF%83%CE%B7%CE%BC%CE%B2%CF%81%CE%B9%CE%BD%CF%8C%CF%82" title="Μεσημβρινός - greco" lang="el" hreflang="el" data-title="Μεσημβρινός" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Meridian_(geography)" title="Meridian (geography) - inglese" lang="en" hreflang="en" data-title="Meridian (geography)" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Meridiano" title="Meridiano - esperanto" lang="eo" hreflang="eo" data-title="Meridiano" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Meridiano" title="Meridiano - spagnolo" lang="es" hreflang="es" data-title="Meridiano" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Meridiaan" title="Meridiaan - estone" lang="et" hreflang="et" data-title="Meridiaan" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Meridiano" title="Meridiano - basco" lang="eu" hreflang="eu" data-title="Meridiano" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Meridianu" title="Meridianu - estremegno" lang="ext" hreflang="ext" data-title="Meridianu" data-language-autonym="Estremeñu" data-language-local-name="estremegno" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%D8%B5%D9%81%E2%80%8C%D8%A7%D9%84%D9%86%D9%87%D8%A7%D8%B1" title="نصف‌النهار - persiano" lang="fa" hreflang="fa" data-title="نصف‌النهار" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Pituuspiiri" title="Pituuspiiri - finlandese" lang="fi" hreflang="fi" data-title="Pituuspiiri" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/M%C3%A9ridien" title="Méridien - francese" lang="fr" hreflang="fr" data-title="Méridien" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Meridiaan" title="Meridiaan - frisone occidentale" lang="fy" hreflang="fy" data-title="Meridiaan" data-language-autonym="Frysk" data-language-local-name="frisone occidentale" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Fadl%C3%ADne" title="Fadlíne - irlandese" lang="ga" hreflang="ga" data-title="Fadlíne" data-language-autonym="Gaeilge" data-language-local-name="irlandese" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Meridiano" title="Meridiano - galiziano" lang="gl" hreflang="gl" data-title="Meridiano" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%A8%D7%99%D7%93%D7%99%D7%90%D7%9F" title="מרידיאן - ebraico" lang="he" hreflang="he" data-title="מרידיאן" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AF%E0%A4%BE%E0%A4%AE%E0%A5%8B%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%B0" title="यामोत्तर - hindi" lang="hi" hreflang="hi" data-title="यामोत्तर" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Meridijan" title="Meridijan - croato" lang="hr" hreflang="hr" data-title="Meridijan" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hsb mw-list-item"><a href="https://hsb.wikipedia.org/wiki/Meridian_(geografija)" title="Meridian (geografija) - alto sorabo" lang="hsb" hreflang="hsb" data-title="Meridian (geografija)" data-language-autonym="Hornjoserbsce" data-language-local-name="alto sorabo" class="interlanguage-link-target"><span>Hornjoserbsce</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Hossz%C3%BAs%C3%A1gi_k%C3%B6r" title="Hosszúsági kör - ungherese" lang="hu" hreflang="hu" data-title="Hosszúsági kör" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%84%D5%AB%D5%BB%D6%85%D6%80%D5%A5%D5%A1%D5%AF%D5%A1%D5%B6" title="Միջօրեական - armeno" lang="hy" hreflang="hy" data-title="Միջօրեական" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Meridian_(geografi)" title="Meridian (geografi) - indonesiano" lang="id" hreflang="id" data-title="Meridian (geografi)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Meridiano_(heograpia)" title="Meridiano (heograpia) - ilocano" lang="ilo" hreflang="ilo" data-title="Meridiano (heograpia)" data-language-autonym="Ilokano" data-language-local-name="ilocano" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%AD%90%E5%8D%88%E7%B7%9A" title="子午線 - giapponese" lang="ja" hreflang="ja" data-title="子午線" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - kazako" lang="kk" hreflang="kk" data-title="Меридиан" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%81%E1%9F%92%E1%9E%9F%E1%9F%82%E1%9E%94%E1%9E%8E%E1%9F%92%E1%9E%8A%E1%9F%84%E1%9E%99" title="ខ្សែបណ្ដោយ - khmer" lang="km" hreflang="km" data-title="ខ្សែបណ្ដោយ" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B2%BD%EC%84%A0" title="경선 - coreano" lang="ko" hreflang="ko" data-title="경선" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Mer%C3%AEdyen" title="Merîdyen - curdo" lang="ku" hreflang="ku" data-title="Merîdyen" data-language-autonym="Kurdî" data-language-local-name="curdo" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - kirghiso" lang="ky" hreflang="ky" data-title="Меридиан" data-language-autonym="Кыргызча" data-language-local-name="kirghiso" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Meridianus" title="Meridianus - latino" lang="la" hreflang="la" data-title="Meridianus" data-language-autonym="Latina" data-language-local-name="latino" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Meridiaon" title="Meridiaon - limburghese" lang="li" hreflang="li" data-title="Meridiaon" data-language-autonym="Limburgs" data-language-local-name="limburghese" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Meridian" title="Meridian - lombardo" lang="lmo" hreflang="lmo" data-title="Meridian" data-language-autonym="Lombard" data-language-local-name="lombardo" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Geografinis_dienovidinis" title="Geografinis dienovidinis - lituano" lang="lt" hreflang="lt" data-title="Geografinis dienovidinis" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Meridi%C4%81ns" title="Meridiāns - lettone" lang="lv" hreflang="lv" data-title="Meridiāns" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD%D1%86%D1%8C" title="Меридианць - moksha" lang="mdf" hreflang="mdf" data-title="Меридианць" data-language-autonym="Мокшень" data-language-local-name="moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - Eastern Mari" lang="mhr" hreflang="mhr" data-title="Меридиан" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D1%98%D0%B0%D0%BD" title="Меридијан - macedone" lang="mk" hreflang="mk" data-title="Меридијан" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A7%E0%B5%8D%E0%B4%B0%E0%B5%81%E0%B4%B5%E0%B4%B0%E0%B5%87%E0%B4%96" title="ധ്രുവരേഖ - malayalam" lang="ml" hreflang="ml" data-title="ധ്രുവരേഖ" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Meridian_(geografi)" title="Meridian (geografi) - malese" lang="ms" hreflang="ms" data-title="Meridian (geografi)" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Meridiaan_(geografie)" title="Meridiaan (geografie) - olandese" lang="nl" hreflang="nl" data-title="Meridiaan (geografie)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Meridian" title="Meridian - occitano" lang="oc" hreflang="oc" data-title="Meridian" data-language-autonym="Occitan" data-language-local-name="occitano" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Po%C5%82udnik" title="Południk - polacco" lang="pl" hreflang="pl" data-title="Południk" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%86%D8%B5%D9%81_%D8%A7%D9%84%D9%86%DB%81%D8%A7%D8%B1" title="نصف النہار - Western Punjabi" lang="pnb" hreflang="pnb" data-title="نصف النہار" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Meridiano_(geografia)" title="Meridiano (geografia) - portoghese" lang="pt" hreflang="pt" data-title="Meridiano (geografia)" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - russo" lang="ru" hreflang="ru" data-title="Меридиан" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D1%96%D0%B4%D1%96%D0%B0%D0%BD" title="Мерідіан - ruteno" lang="rue" hreflang="rue" data-title="Мерідіан" data-language-autonym="Русиньскый" data-language-local-name="ruteno" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD" title="Меридиан - sacha" lang="sah" hreflang="sah" data-title="Меридиан" data-language-autonym="Саха тыла" data-language-local-name="sacha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Meridijan" title="Meridijan - serbo-croato" lang="sh" hreflang="sh" data-title="Meridijan" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Meridian" title="Meridian - Simple English" lang="en-simple" hreflang="en-simple" data-title="Meridian" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Poludn%C3%ADk" title="Poludník - slovacco" lang="sk" hreflang="sk" data-title="Poludník" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Poldnevnik" title="Poldnevnik - sloveno" lang="sl" hreflang="sl" data-title="Poldnevnik" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D1%98%D0%B0%D0%BD_(%D0%B3%D0%B5%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D1%98%D0%B0)" title="Меридијан (географија) - serbo" lang="sr" hreflang="sr" data-title="Меридијан (географија)" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Meridian" title="Meridian - svedese" lang="sv" hreflang="sv" data-title="Meridian" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Meridiani" title="Meridiani - swahili" lang="sw" hreflang="sw" data-title="Meridiani" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A8%E0%AF%86%E0%AE%9F%E0%AF%81%E0%AE%B5%E0%AE%B0%E0%AF%88_(%E0%AE%AA%E0%AF%81%E0%AE%B5%E0%AE%BF%E0%AE%AF%E0%AE%BF%E0%AE%AF%E0%AE%B2%E0%AF%8D)" title="நெடுவரை (புவியியல்) - tamil" lang="ta" hreflang="ta" data-title="நெடுவரை (புவியியல்)" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AA%E0%B9%89%E0%B8%99%E0%B9%80%E0%B8%A1%E0%B8%A3%E0%B8%B4%E0%B9%80%E0%B8%94%E0%B8%B5%E0%B8%A2%E0%B8%99" title="เส้นเมริเดียน - thailandese" lang="th" hreflang="th" data-title="เส้นเมริเดียน" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Meridyano_(heograpiya)" title="Meridyano (heograpiya) - tagalog" lang="tl" hreflang="tl" data-title="Meridyano (heograpiya)" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B8%D0%B4%D1%96%D0%B0%D0%BD" title="Меридіан - ucraino" lang="uk" hreflang="uk" data-title="Меридіан" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%86%D8%B5%D9%81_%D8%A7%D9%84%D9%86%DB%81%D8%A7%D8%B1" title="نصف النہار - urdu" lang="ur" hreflang="ur" data-title="نصف النہار" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Meridian" title="Meridian - uzbeco" lang="uz" hreflang="uz" data-title="Meridian" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Kinh_tuy%E1%BA%BFn" title="Kinh tuyến - vietnamita" lang="vi" hreflang="vi" data-title="Kinh tuyến" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Coistrece_(djeyografeye)" title="Coistrece (djeyografeye) - vallone" lang="wa" hreflang="wa" data-title="Coistrece (djeyografeye)" data-language-autonym="Walon" data-language-local-name="vallone" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Meridyano_(heyograpiya)" title="Meridyano (heyograpiya) - waray" lang="war" hreflang="war" data-title="Meridyano (heyograpiya)" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%BB%8F%E7%BA%BF" title="经线 - wu" lang="wuu" hreflang="wuu" data-title="经线" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%9E%D7%A2%D7%A8%D7%99%D7%93%D7%99%D7%90%D7%9F" title="מערידיאן - yiddish" lang="yi" hreflang="yi" data-title="מערידיאן" data-language-autonym="ייִדיש" data-language-local-name="yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%BB%8F%E7%BA%BF" title="经线 - cinese" lang="zh" hreflang="zh" data-title="经线" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Ch%C3%BA-ng%C3%B3%CD%98-s%C3%B2a%E2%81%BF" title="Chú-ngó͘-sòaⁿ - min nan" lang="nan" hreflang="nan" data-title="Chú-ngó͘-sòaⁿ" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%B6%93%E7%B7%9A" title="經線 - cantonese" lang="yue" hreflang="yue" data-title="經線" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q32099#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div 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class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r130658281">body:not(.skin-minerva) .mw-parser-output .hatnote.nota-disambigua{clear:both;margin-top:0;padding:.05em .5em}</style> <style data-mw-deduplicate="TemplateStyles:r139142988">.mw-parser-output .hatnote-content{align-items:center;display:flex}.mw-parser-output .hatnote-icon{flex-shrink:0}.mw-parser-output .hatnote-icon img{display:flex}.mw-parser-output .hatnote-text{font-style:italic}body:not(.skin-minerva) .mw-parser-output .hatnote{border:1px solid #CCC;display:flex;margin:.5em 0;padding:.2em 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href="/wiki/Aiuto:Disambiguazione" title="Aiuto:Disambiguazione">Disambiguazione</a> – Se stai cercando altri significati, vedi <b><a href="/wiki/Meridiano_(disambigua)" class="mw-disambig" title="Meridiano (disambigua)">Meridiano (disambigua)</a></b>.</span></div> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Longitude_blue.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Longitude_blue.svg/220px-Longitude_blue.svg.png" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Longitude_blue.svg/330px-Longitude_blue.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Longitude_blue.svg/440px-Longitude_blue.svg.png 2x" data-file-width="210" data-file-height="210" /></a><figcaption>Meridiani</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Prime_meridian.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Prime_meridian.jpg/220px-Prime_meridian.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Prime_meridian.jpg/330px-Prime_meridian.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Prime_meridian.jpg/440px-Prime_meridian.jpg 2x" data-file-width="450" data-file-height="600" /></a><figcaption>Il meridiano zero a Greenwich, in Inghilterra</figcaption></figure> <p>Un <b>meridiano</b> o <b>linea di longitudine</b>, in <a href="/wiki/Geografia" title="Geografia">geografia</a>, indica un immaginario <a href="/wiki/Arco_(geometria)" title="Arco (geometria)">arco</a> che congiunge il <a href="/wiki/Polo_Nord" class="mw-redirect" title="Polo Nord">Polo Nord</a> terrestre con il <a href="/wiki/Polo_Sud" class="mw-redirect" title="Polo Sud">Polo Sud</a> terrestre ovvero una linea che unisce i (due) punti per i quali passa l'asse di rotazione terrestre. </p><p>Un meridiano, assieme al suo antimeridiano, forma il <a href="/wiki/Cerchio_massimo" title="Cerchio massimo">cerchio massimo</a> ottenuto dall'intersezione di un piano che attraversa la Terra passando per il suo centro. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Descrizione">Descrizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=1" title="Modifica la sezione Descrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=1" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il termine "meridiano" deriva dal latino <i>meridies</i>, che significa "mezzogiorno". Esso unisce tutti i punti della Terra che hanno il mezzogiorno nello stesso istante. Il Sole attraversa un dato meridiano terrestre a metà del periodo di tempo che va dall'<a href="/wiki/Aurora_(giorno)" title="Aurora (giorno)">aurora</a> al <a href="/wiki/Tramonto" title="Tramonto">tramonto</a>. </p><p>Sulla terra, che ruota attorno al proprio asse, si dicono meridiani tutte le curve che risultano dall'intersezione della sua superficie con un qualsiasi semipiano che esce dall'asse di rotazione; nell'uso comune, s'intende per meridiano la circonferenza massima (cerchio meridiano) costituita da due meridiani opposti. L'asse terrestre incontra la superficie della terra ai poli, per essi passano infiniti "meridiani". </p><p>Per ogni punto della <a href="/wiki/Superficie_della_Terra" class="mw-redirect" title="Superficie della Terra">superficie della Terra</a> diverso dai poli invece passa un solo meridiano, identificabile dalla <a href="/wiki/Longitudine" title="Longitudine">longitudine</a> corrispondente; la longitudine di un punto è convenzionalmente misurata come arco di equatore compreso tra il <a href="/wiki/Meridiano_di_Greenwich" title="Meridiano di Greenwich">meridiano fondamentale</a> e il meridiano passante per il punto. Alla <a href="/wiki/Longitudine" title="Longitudine">longitudine</a> di un punto viene assegnato il cardine Est oppure Ovest a seconda che esso si trovi a destra (oriente) o a sinistra (occidente) del meridiano di Greenwich, per un osservatore con la faccia rivolta verso il polo nord. </p><p>Tutti i meridiani hanno uguale lunghezza, essendo la metà di un <a href="/wiki/Cerchio_massimo" title="Cerchio massimo">cerchio massimo</a> sulla superficie terrestre. La lunghezza è pari a 20.004,9 km. </p><p>Per convenzione, il "meridiano 0" detto anche <a href="/wiki/Meridiano_di_Greenwich" title="Meridiano di Greenwich">Meridiano di Greenwich</a> ("Prime Meridian" in <a href="/wiki/Lingua_inglese" title="Lingua inglese">inglese)</a> passa appunto per <a href="/wiki/Greenwich" title="Greenwich">Greenwich</a> (<a href="/wiki/Londra" title="Londra">Londra</a>), l'altra sua metà (l'antimeridiano 180°) passa per l'<a href="/wiki/Oceano_Pacifico" title="Oceano Pacifico">Oceano Pacifico</a> identificando in massima parte la cosiddetta <a href="/wiki/Linea_di_cambiamento_di_data" class="mw-redirect" title="Linea di cambiamento di data">linea di cambiamento di data</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Storia_della_misura_del_meridiano_terrestre">Storia della misura del meridiano terrestre</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=2" title="Modifica la sezione Storia della misura del meridiano terrestre" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=2" title="Edit section's source code: Storia della misura del meridiano terrestre"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r130657691">body:not(.skin-minerva) .mw-parser-output .vedi-anche{font-size:95%}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r139142988"> <div class="hatnote noprint vedi-anche"> <div class="hatnote-content"><span class="noviewer hatnote-icon" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/87/Magnifying_glass_icon_mgx2.svg/18px-Magnifying_glass_icon_mgx2.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/87/Magnifying_glass_icon_mgx2.svg/27px-Magnifying_glass_icon_mgx2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/87/Magnifying_glass_icon_mgx2.svg/36px-Magnifying_glass_icon_mgx2.svg.png 2x" data-file-width="286" data-file-height="280" /></span></span> <span class="hatnote-text">Lo stesso argomento in dettaglio: <b><a href="/wiki/Eratostene_di_Cirene#Geografia_terrestre_e_la_misura_del_meridiano" title="Eratostene di Cirene">Eratostene di Cirene § Geografia terrestre e la misura del meridiano</a></b>.</span></div> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Portrait_of_Eratosthenes.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Portrait_of_Eratosthenes.png/220px-Portrait_of_Eratosthenes.png" decoding="async" width="220" height="218" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/a/a2/Portrait_of_Eratosthenes.png 1.5x" data-file-width="278" data-file-height="275" /></a><figcaption><a href="/wiki/Eratostene_di_Cirene" title="Eratostene di Cirene">Eratostene di Cirene</a></figcaption></figure> <p>In antichità le prime stime della lunghezza del meridiano terrestre si basavano sul semplice assunto geometrico che la forma della <a href="/wiki/Terra" title="Terra">Terra</a> fosse una <a href="/wiki/Sfera" title="Sfera">sfera</a>. Conoscendo quindi sia la misura di un arco di meridiano terrestre sia il corrispondente angolo al centro, era possibile calcolare la lunghezza del meridiano stesso attraverso una proporzione. </p><p>Dalle informazioni giunte fino a noi dall'epoca classica, su questo semplice modello si dovevano essere basate le prime stime di studiosi, quali ad esempio <a href="/wiki/Eudosso_di_Cnido" title="Eudosso di Cnido">Eudosso di Cnido</a> e <a href="/wiki/Dicearco_da_Messina" class="mw-redirect" title="Dicearco da Messina">Dicearco da Messina</a>. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Eratosthenes_%26_measurement_of_the_Earth.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/Eratosthenes_%26_measurement_of_the_Earth.png/220px-Eratosthenes_%26_measurement_of_the_Earth.png" decoding="async" width="220" height="152" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/b/be/Eratosthenes_%26_measurement_of_the_Earth.png 1.5x" data-file-width="300" data-file-height="207" /></a><figcaption> Misurazione del diametro terrestre</figcaption></figure> <p>La prima misurazione del meridiano terrestre di cui si hanno notizie meno incerte la dobbiamo al <a href="/wiki/Filosofo" title="Filosofo">filosofo</a> e <a href="/wiki/Astronomo" title="Astronomo">astronomo</a> <a href="/wiki/Antica_Grecia" title="Antica Grecia">greco antico</a> <a href="/wiki/Eratostene" class="mw-redirect" title="Eratostene">Eratostene di Cirene</a> (<a href="/wiki/III_secolo_a.C." title="III secolo a.C.">III secolo a.C.</a>), che dirigeva la <a href="/wiki/Biblioteca_di_Alessandria" title="Biblioteca di Alessandria">Biblioteca di Alessandria</a>. </p><p>Si tratta del risultato più noto cui è associato il nome dello scienziato perché, avendo ottenuto per il meridiano una lunghezza di 252 000 <a href="/wiki/Stadio_(unit%C3%A0_di_misura)" title="Stadio (unità di misura)">stadi</a>, l'errore di misura è tra il -2,4% e il +0,8% rispetto al valore corretto assumendo uno stadio compreso tra i 155 e i 160 metri. </p><p>Il procedimento seguito era descritto in un'opera in due libri Sulla misura della Terra, che è però andata perduta. Conosciamo infatti il metodo usato da Eratostene non dalle opere di Eratostene stesso ma attraverso il racconto che ne fa <a href="/wiki/Cleomede" title="Cleomede">Cleomede</a>, un astronomo vissuto nel <a href="/wiki/I_secolo_a.C." title="I secolo a.C.">I secolo a.C.</a>, con intento di divulgativo. L'opera<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> di Cleomede inizia specificando che i calcoli verranno semplificati per il lettore. Avendo assunto che Siene si trovi sul <a href="/wiki/Tropico_del_Cancro" title="Tropico del Cancro">Tropico del Cancro</a> (corretto) e che Siene ed <a href="/wiki/Alessandria_d%27Egitto" title="Alessandria d'Egitto">Alessandria d'Egitto</a> siano sullo stesso meridiano (ipotesi in realtà errata), Eratostene usò la distanza tra le due città, che Cleomede dice essere 5 000 stadi, per costruire una proporzione tra distanze e angoli: l'intera lunghezza del meridiano è, rispetto alla distanza delle città, nello stesso rapporto dell'intero angolo alla circonferenza con l'angolo che i raggi solari formano con la verticale. Infatti a Siene durante il <a href="/wiki/Solstizio_d%27estate" class="mw-redirect" title="Solstizio d'estate">solstizio d'estate</a>, i raggi del Sole penetravano fino al fondo dei pozzi e quindi il Sole in quel momento era allo <a href="/wiki/Zenit" title="Zenit">zenit</a>. Misurando quindi l'angolo che i raggi formano nello stesso giorno ed istante ad Alessandria d'Egitto con uno <a href="/wiki/Gnomone" title="Gnomone">gnomone</a> si ottiene il rapporto di 1/50 di angolo giro (corrispondente a 7° e 11'<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>). </p><p>Cleomede a questo punto specifica che il metodo usato da Eratostene era in realtà più complesso. Egli aveva infatti a disposizione le molteplici diverse misurazioni compiute dai <i>mensores regii</i> del re <a href="/wiki/Tolomeo_III" title="Tolomeo III">Tolomeo III</a>, funzionari che periodicamente effettuavano misure dettagliate dell'Egitto a fini fiscali. Il valore stesso di 252 000 stadi potrebbe essere significativo: si tratta infatti di un numero divisibile per tutti i numeri naturali da 1 a 10. Secondo un'interpretazione<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>, Eratostene avrebbe alterato i dati per ottenere questo risultato molto conveniente; secondo l'interpretazione di <a href="/wiki/Lucio_Russo" title="Lucio Russo">Lucio Russo</a><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>, basata su una affermazione di <a href="/wiki/Gaio_Plinio_Secondo" class="mw-redirect" title="Gaio Plinio Secondo">Plinio</a> che parla dello stadio «secondo il rapporto di Eratostene», Eratostene avrebbe usato questa misurazione per introdurre un nuovo stadio come sottomultiplo del meridiano, similimente a quanto compiuto nel 1791 per la definizione del <a href="/wiki/Metro" title="Metro">Metro</a> come <a href="/wiki/Unit%C3%A0_di_misura" title="Unità di misura">unità di misura</a>. </p><p>Nel 1669-70 <a href="/wiki/Jean_Picard" title="Jean Picard">Jean Picard</a> fu il primo scienziato di epoca moderna a ripetere la <a href="/wiki/Jean_Picard#Geodesia" title="Jean Picard">misura</a> della grandezza della <a href="/wiki/Terra" title="Terra">Terra</a> con altrettanta precisione. </p><p>Diversamente da Eratostene, usò la triangolazione per giungere alla misura di un grado di latitudine del meridiano passante per <a href="/wiki/Parigi" title="Parigi">Parigi</a> attraverso tredici diverse triangolazioni tra Parigi e la città di <a href="/wiki/Sourdon" title="Sourdon">Sourdon</a>, nel sud della <a href="/wiki/Francia" title="Francia">Francia</a>, vicino ad <a href="/wiki/Amiens" title="Amiens">Amiens</a>. </p><p>In epoca contemporanea, la misurazione del meridiano terrestre è un problema della <a href="/wiki/Geodesia" title="Geodesia">Geodesia</a> e può essere risolto con diverse tecniche, che utilizzano principalmente misurazioni <a href="/wiki/Satellite_artificiale" title="Satellite artificiale">satellitari</a>. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:World_map_longlat.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/World_map_longlat.svg/240px-World_map_longlat.svg.png" decoding="async" width="240" height="137" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/World_map_longlat.svg/360px-World_map_longlat.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/World_map_longlat.svg/480px-World_map_longlat.svg.png 2x" data-file-width="1200" data-file-height="684" /></a><figcaption>Carta del globo terrestre con la tracciatura dei meridiani (verticali) e <a href="/wiki/Parallelo_(geografia)" title="Parallelo (geografia)">paralleli</a> (orizzontali)</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Latitud.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Latitud.png/200px-Latitud.png" decoding="async" width="200" height="217" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Latitud.png/300px-Latitud.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Latitud.png/400px-Latitud.png 2x" data-file-width="409" data-file-height="443" /></a><figcaption>Nella figura è evidenziata la <a href="/wiki/Latitudine" title="Latitudine">latitudine</a> come "arco di meridiano". Analogamente la <a href="/wiki/Longitudine" title="Longitudine">longitudine</a> è rappresentabile come "arco di parallelo"</figcaption></figure> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=3" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=3" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text">Cleomede, <i>De motu circulari corporum caelestium</i>, I 7, 49-52.</span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text">La geografia Alessandrina (Eratostene di Cirene, pag 3)</span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://manuelacasasoli.altervista.org/pagine/approfondimenti/eratostene_terra.html"><span style="font-style:italic;">Eratostene e la misura della Terra</span></a>, su <span style="font-style:italic;">manuelacasasoli.altervista.org</span>. <small>URL consultato il 5 maggio 2024</small>.</cite></span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Dennis Rawlins, <a rel="nofollow" class="external text" href="https://link.springer.com/article/10.1007/BF00348500"><span style="font-style:italic;"><span></span><i>The Erathostenes-Strabo Nile Map. Is It the Earliest Surviving Istance of Spherical Carthography? Did It Supply the 5000 Stades Arc for Erathostenes' Experiment?</i><span></span></span></a>, in <span style="font-style:italic;">"Archive for History of Exact Sciences"</span>, n. 26, 1983, pp. 211–219. <small>URL consultato il 25-01-2020</small>.</cite>.</span> </li> <li id="cite_note-5"><a href="#cite_ref-5"><b>^</b></a> <span class="reference-text"><cite id="CITEREFRusso" class="citation libro" style="font-style:normal"> <a href="/wiki/Lucio_Russo" title="Lucio Russo">Lucio Russo</a>, <span style="font-style:italic;"><span></span><i>La rivoluzione dimenticata. Il pensiero scientifico greco e la scienza moderna</i><span></span></span>, XII edizione, Milano, Feltrinelli, 2021, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/9788807895296" title="Speciale:RicercaISBN/9788807895296">9788807895296</a>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=4" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=4" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Longitudine" title="Longitudine">Longitudine</a></li> <li><a href="/wiki/Latitudine" title="Latitudine">Latitudine</a></li> <li><a href="/wiki/Geografia" title="Geografia">Geografia</a></li> <li><a href="/wiki/Coordinate_geografiche" title="Coordinate geografiche">Coordinate geografiche</a></li> <li><a href="/wiki/Cartografia" title="Cartografia">Cartografia</a></li> <li><a href="/wiki/Parallelo_(geografia)" title="Parallelo (geografia)">Parallelo</a></li> <li><a href="/wiki/Meridiano_di_Greenwich" title="Meridiano di Greenwich">Meridiano di Greenwich</a></li> <li><a href="/wiki/Meridiano_di_Parigi" title="Meridiano di Parigi">Meridiano di Parigi</a></li> <li><a href="/wiki/Meridiano_di_Roma" title="Meridiano di Roma">Meridiano di Roma</a></li> <li><a href="/wiki/Meridiano_(astronomia)" class="mw-redirect" title="Meridiano (astronomia)">Meridiano (astronomia)</a></li> <li><a href="/wiki/Equatore" title="Equatore">Equatore</a></li> <li><a href="/wiki/3%C2%BA_meridiano_ovest" title="3º meridiano ovest">3º meridiano ovest</a></li> <li><a href="/wiki/42%C2%BA_meridiano_ovest" title="42º meridiano ovest">42º meridiano ovest</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=5" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=5" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wiktionary.org/wiki/meridiano" class="extiw" title="wikt:meridiano">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:Meridian markers"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Meridian_markers?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/18px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/27px-Wiktionary_small.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/36px-Wiktionary_small.svg.png 2x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/meridiano" class="extiw" title="wikt:meridiano">meridiano</a></b>»</li> <li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Meridian_markers?uselang=it">meridiano</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Meridiano&veaction=edit&section=6" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Meridiano&action=edit&section=6" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/meridian-geography"><span style="font-style:italic;">meridian</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q32099#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Astronomia_greca"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; 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navbox_even"><a href="/w/index.php?title=Anello_equatoriale&action=edit&redlink=1" class="new" title="Anello equatoriale (la pagina non esiste)">Anello equatoriale</a><b> ·</b> <a href="/wiki/Astrolabio" title="Astrolabio">Astrolabio</a><b> ·</b> <a href="/wiki/Diottra" title="Diottra">Diottra</a><b> ·</b> <a href="/wiki/Gnomone" title="Gnomone">Gnomone</a><b> ·</b> <a href="/wiki/Macchina_di_Anticitera" title="Macchina di Anticitera">Macchina di Anticitera</a><b> ·</b> <a href="/wiki/Quadrante_(astronomia)" title="Quadrante (astronomia)">Quadrante</a><b> ·</b> <a href="/wiki/Planetario" title="Planetario">Planetario</a><b> ·</b> <a href="/wiki/Sfera_armillare" title="Sfera armillare">Sfera armillare</a><b> ·</b> <a href="/wiki/Triquetrum" class="mw-redirect" title="Triquetrum">Triquetrum</a></td></tr><tr><th colspan="1" class="navbox_group">Opere</th><td colspan="1" class="navbox_list navbox_odd"><i><a href="/wiki/Almagesto" title="Almagesto">Almagesto</a></i><b> ·</b> <i><a href="/wiki/De_caelo" title="De caelo">De caelo</a></i></td></tr><tr><th colspan="1" class="navbox_group">Concetti</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Antiterra" title="Antiterra">Antiterra</a><b> ·</b> <a href="/wiki/Ciclo_metonico" title="Ciclo metonico">Ciclo metonico</a><b> ·</b> <a href="/wiki/Ciclo_callippico" title="Ciclo callippico">Ciclo callippico</a><b> ·</b> <a href="/wiki/Epiciclo_e_deferente" title="Epiciclo e deferente">Epiciclo e deferente</a><b> ·</b> <a href="/wiki/Equante" title="Equante">Equante</a><b> ·</b> <a class="mw-selflink selflink">Meridiano</a><b> ·</b> <a href="/wiki/Parallelo_(geografia)" title="Parallelo (geografia)">Parallelo</a><b> ·</b> <a href="/wiki/Octaeteride" title="Octaeteride">Octaeteride</a><b> ·</b> <a href="/wiki/Sfere_celesti" title="Sfere celesti">Sfere celesti</a> (<a href="/wiki/Primo_mobile" title="Primo mobile">Primo mobile</a><b> ·</b> <a href="/wiki/Firmamento" title="Firmamento">Firmamento</a><b> ·</b> <a href="/wiki/Stelle_fisse" title="Stelle fisse">Stelle fisse</a>)<b> ·</b> <a href="/wiki/Sfere_sublunari" class="mw-redirect" title="Sfere sublunari">Sfere sublunari</a> (<a href="/wiki/Sfera_del_fuoco" title="Sfera del fuoco">Sfera del fuoco</a>)<b> ·</b> <a href="/wiki/Sistema_geocentrico" title="Sistema geocentrico">Sistema geocentrico</a><b> ·</b> <a href="/wiki/Sistema_eliocentrico" title="Sistema eliocentrico">Sistema eliocentrico</a><b> ·</b> <a href="/wiki/Solstizio" title="Solstizio">Solstizio</a><b> ·</b> <a href="/wiki/Zodiaco" title="Zodiaco">Zodiaco</a></td></tr><tr><th colspan="1" class="navbox_group">Influenze precedenti</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Cosmografia_mesopotamica" title="Cosmografia mesopotamica">Cosmografia mesopotamica</a><b> ·</b> <a href="/wiki/Astronomia_babilonese" title="Astronomia babilonese">Astronomia babilonese</a><b> ·</b> <a href="/wiki/Astronomia_egizia" title="Astronomia egizia">Astronomia egizia</a></td></tr><tr><th colspan="1" class="navbox_group">Influenze successive</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Scienza_medievale#Astrologia" title="Scienza medievale">Astronomia medievale europea</a><b> ·</b> <a href="/wiki/Astronomia_indiana" title="Astronomia indiana">Astronomia indiana</a><b> ·</b> <a href="/wiki/Astronomia_islamica" title="Astronomia islamica">Astronomia islamica</a></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA th{background-color:#f2f2f2;font-weight:bold;width:20%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .CdA th{background-color:#202122}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output 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href="/wiki/Biblioteca_nazionale_di_Israele" title="Biblioteca nazionale di Israele">J9U</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr>, <abbr title="ebraico">HE</abbr></span>) <a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007563842305171">987007563842305171</a></span></td></tr></tbody></table> <div class="noprint" style="width:100%; padding: 3px 0; display: flex; flex-wrap: wrap; row-gap: 4px; column-gap: 8px; box-sizing: border-box;"><div style="flex-grow: 1"><style data-mw-deduplicate="TemplateStyles:r140555418">.mw-parser-output .itwiki-template-occhiello{width:100%;line-height:25px;border:1px solid #CCF;background-color:#F0EEFF;box-sizing:border-box}.mw-parser-output .itwiki-template-occhiello-progetto{background-color:#FAFAFA}@media screen{html.skin-theme-clientpref-night .mw-parser-output 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title="Categoria:Cartografia">Cartografia</a></li><li><a href="/wiki/Categoria:Longitudine" title="Categoria:Longitudine">Longitudine</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categorie nascoste: <ul><li><a href="/wiki/Categoria:P1417_letta_da_Wikidata" title="Categoria:P1417 letta da Wikidata">P1417 letta da Wikidata</a></li><li><a href="/wiki/Categoria:Voci_con_codice_LCCN" title="Categoria:Voci con codice LCCN">Voci con codice LCCN</a></li><li><a href="/wiki/Categoria:Voci_con_codice_GND" title="Categoria:Voci con codice GND">Voci con codice GND</a></li><li><a href="/wiki/Categoria:Voci_con_codice_J9U" title="Categoria:Voci con codice J9U">Voci con codice J9U</a></li><li><a href="/wiki/Categoria:Voci_non_biografiche_con_codici_di_controllo_di_autorit%C3%A0" title="Categoria:Voci non biografiche con codici di controllo di autorità">Voci non biografiche con codici di controllo di autorità</a></li></ul></div></div> </div> </main> 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