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[o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Skrá inn</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Síður fyrir útskráða notendur <a href="/wiki/Hj%C3%A1lp:Introduction" aria-label="Læra meira um breytingar"><span>Læra meira</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/Kerfiss%C3%AD%C3%B0a:Framl%C3%B6g_m%C3%ADn" title="Listi yfir breytingar frá þessu IP-staðfangi [y]" accesskey="y"><span>Framlög</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:Spjallas%C3%AD%C3%B0a_m%C3%ADn" title="Spjall um breytingar frá þessu IP-staðfangi [n]" accesskey="n"><span>Spjall</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="Vefsíða"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Stjarnsiglingafræði</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="Fara á grein á öðru tungumáli. Til staðar á 39 tungumálum" > <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-39" 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">39 tungumál</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D9%84%D8%A7%D8%AD%D8%A9_%D9%81%D9%84%D9%83%D9%8A%D8%A9" title="ملاحة فلكية – arabíska" lang="ar" hreflang="ar" data-title="ملاحة فلكية" data-language-autonym="العربية" data-language-local-name="arabíska" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%BD%D0%B0%D0%B2%D0%B8%D0%B3%D0%B0%D1%86%D0%B8%D1%8F" title="Астрономическа навигация – búlgarska" lang="bg" hreflang="bg" data-title="Астрономическа навигация" data-language-autonym="Български" data-language-local-name="búlgarska" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Navegaci%C3%B3_astron%C3%B2mica" title="Navegació astronòmica – katalónska" lang="ca" hreflang="ca" data-title="Navegació astronòmica" data-language-autonym="Català" data-language-local-name="katalónska" 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/Astronavigace" title="Astronavigace – tékkneska" lang="cs" hreflang="cs" data-title="Astronavigace" data-language-autonym="Čeština" data-language-local-name="tékkneska" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Astronomische_Navigation" title="Astronomische Navigation – þýska" lang="de" hreflang="de" data-title="Astronomische Navigation" data-language-autonym="Deutsch" data-language-local-name="þýska" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%AE_%CE%BD%CE%B1%CF%85%CF%83%CE%B9%CF%80%CE%BB%CE%BF%CE%90%CE%B1" title="Αστρονομική ναυσιπλοΐα – gríska" lang="el" hreflang="el" data-title="Αστρονομική ναυσιπλοΐα" data-language-autonym="Ελληνικά" data-language-local-name="gríska" 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/Celestial_navigation" title="Celestial navigation – enska" lang="en" hreflang="en" data-title="Celestial navigation" data-language-autonym="English" data-language-local-name="enska" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Navegaci%C3%B3n_astron%C3%B3mica" title="Navegación astronómica – spænska" lang="es" hreflang="es" data-title="Navegación astronómica" data-language-autonym="Español" data-language-local-name="spænska" 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/Astronavigatsioon" title="Astronavigatsioon – eistneska" lang="et" hreflang="et" data-title="Astronavigatsioon" data-language-autonym="Eesti" data-language-local-name="eistneska" 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/Nabigazio_astronomiko" title="Nabigazio astronomiko – baskneska" lang="eu" hreflang="eu" data-title="Nabigazio astronomiko" data-language-autonym="Euskara" data-language-local-name="baskneska" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%D8%A7%D9%88%D8%A8%D8%B1%DB%8C_%D9%81%D9%84%DA%A9%DB%8C" title="ناوبری فلکی – persneska" lang="fa" hreflang="fa" data-title="ناوبری فلکی" data-language-autonym="فارسی" data-language-local-name="persneska" 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/Astronominen_navigointi" title="Astronominen navigointi – finnska" lang="fi" hreflang="fi" data-title="Astronominen navigointi" data-language-autonym="Suomi" data-language-local-name="finnska" 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/Navigation_astronomique" title="Navigation astronomique – franska" lang="fr" hreflang="fr" data-title="Navigation astronomique" data-language-autonym="Français" data-language-local-name="franska" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A0%D7%99%D7%95%D7%95%D7%98_%D7%90%D7%A1%D7%98%D7%A8%D7%95%D7%A0%D7%95%D7%9E%D7%99" title="ניווט אסטרונומי – hebreska" lang="he" hreflang="he" data-title="ניווט אסטרונומי" data-language-autonym="עברית" data-language-local-name="hebreska" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Astronavigacija" title="Astronavigacija – króatíska" lang="hr" hreflang="hr" data-title="Astronavigacija" data-language-autonym="Hrvatski" data-language-local-name="króatíska" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Csillag%C3%A1szati_navig%C3%A1ci%C3%B3" title="Csillagászati navigáció – ungverska" lang="hu" hreflang="hu" data-title="Csillagászati navigáció" data-language-autonym="Magyar" data-language-local-name="ungverska" 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/%D4%BE%D5%B8%D5%BE%D5%A1%D5%A3%D5%B6%D5%A1%D6%81%D5%A1%D5%B5%D5%AB%D5%B6_%D5%A1%D5%BD%D5%BF%D5%B2%D5%A1%D5%A3%D5%AB%D5%BF%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Ծովագնացային աստղագիտություն – armenska" lang="hy" hreflang="hy" data-title="Ծովագնացային աստղագիտություն" data-language-autonym="Հայերեն" data-language-local-name="armenska" 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/Navigasi_benda_langit" title="Navigasi benda langit – indónesíska" lang="id" hreflang="id" data-title="Navigasi benda langit" data-language-autonym="Bahasa Indonesia" data-language-local-name="indónesíska" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/Njem_%E1%BB%A5gb%E1%BB%8D_mmiri_n%27eluigwe" title="Njem ụgbọ mmiri n'eluigwe – ígbó" lang="ig" hreflang="ig" data-title="Njem ụgbọ mmiri n'eluigwe" data-language-autonym="Igbo" data-language-local-name="ígbó" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Navigazione_astronomica" title="Navigazione astronomica – ítalska" lang="it" hreflang="it" data-title="Navigazione astronomica" data-language-autonym="Italiano" data-language-local-name="ítalska" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%A4%A9%E6%B8%AC%E8%88%AA%E6%B3%95" title="天測航法 – japanska" lang="ja" hreflang="ja" data-title="天測航法" data-language-autonym="日本語" data-language-local-name="japanska" 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%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F%D0%BB%D1%8B%D2%9B_%D0%BD%D0%B0%D0%B2%D0%B8%D0%B3%D0%B0%D1%86%D0%B8%D1%8F" title="Астрономиялық навигация – kasakska" lang="kk" hreflang="kk" data-title="Астрономиялық навигация" data-language-autonym="Қазақша" data-language-local-name="kasakska" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%B2%9C%EB%AC%B8%ED%95%AD%EB%B2%95" title="천문항법 – kóreska" lang="ko" hreflang="ko" data-title="천문항법" data-language-autonym="한국어" data-language-local-name="kóreska" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/J%C5%ABrniec%C4%ABbas_astronomija" title="Jūrniecības astronomija – lettneska" lang="lv" hreflang="lv" data-title="Jūrniecības astronomija" data-language-autonym="Latviešu" data-language-local-name="lettneska" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Astronavigatie" title="Astronavigatie – hollenska" lang="nl" hreflang="nl" data-title="Astronavigatie" data-language-autonym="Nederlands" data-language-local-name="hollenska" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Astronomisk_navigasjon" title="Astronomisk navigasjon – nýnorska" lang="nn" hreflang="nn" data-title="Astronomisk navigasjon" data-language-autonym="Norsk nynorsk" data-language-local-name="nýnorska" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Astronomisk_navigasjon" title="Astronomisk navigasjon – norskt bókmál" lang="nb" hreflang="nb" data-title="Astronomisk navigasjon" data-language-autonym="Norsk bokmål" data-language-local-name="norskt bókmál" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Astronawigacja" title="Astronawigacja – pólska" lang="pl" hreflang="pl" data-title="Astronawigacja" data-language-autonym="Polski" data-language-local-name="pólska" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Navega%C3%A7%C3%A3o_astron%C3%B4mica" title="Navegação astronômica – portúgalska" lang="pt" hreflang="pt" data-title="Navegação astronômica" data-language-autonym="Português" data-language-local-name="portúgalska" 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%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BD%D0%B0%D0%B2%D0%B8%D0%B3%D0%B0%D1%86%D0%B8%D1%8F" title="Астрономическая навигация – rússneska" lang="ru" hreflang="ru" data-title="Астрономическая навигация" data-language-autonym="Русский" data-language-local-name="rússneska" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Celestial_navigation" title="Celestial navigation – Simple English" lang="en-simple" hreflang="en-simple" data-title="Celestial navigation" 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/Astronavig%C3%A1cia" title="Astronavigácia – slóvakíska" lang="sk" hreflang="sk" data-title="Astronavigácia" data-language-autonym="Slovenčina" data-language-local-name="slóvakíska" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9D%D0%B5%D0%B1%D0%B5%D1%81%D0%BA%D0%B0_%D0%BD%D0%B0%D0%B2%D0%B8%D0%B3%D0%B0%D1%86%D0%B8%D1%98%D0%B0" title="Небеска навигација – serbneska" lang="sr" hreflang="sr" data-title="Небеска навигација" data-language-autonym="Српски / srpski" data-language-local-name="serbneska" 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/Astronomisk_navigation" title="Astronomisk navigation – sænska" lang="sv" hreflang="sv" data-title="Astronomisk navigation" data-language-autonym="Svenska" data-language-local-name="sænska" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%80%E0%B8%94%E0%B8%B4%E0%B8%99%E0%B9%80%E0%B8%A3%E0%B8%B7%E0%B8%AD%E0%B8%94%E0%B8%B2%E0%B8%A3%E0%B8%B2%E0%B8%A8%E0%B8%B2%E0%B8%AA%E0%B8%95%E0%B8%A3%E0%B9%8C" title="การเดินเรือดาราศาสตร์ – taílenska" lang="th" hreflang="th" data-title="การเดินเรือดาราศาสตร์" data-language-autonym="ไทย" data-language-local-name="taílenska" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/G%C3%B6ksel_navigasyon" title="Göksel navigasyon – tyrkneska" lang="tr" hreflang="tr" data-title="Göksel navigasyon" data-language-autonym="Türkçe" data-language-local-name="tyrkneska" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D1%96%D1%87%D0%BD%D0%B0_%D0%BD%D0%B0%D0%B2%D1%96%D0%B3%D0%B0%D1%86%D1%96%D1%8F" title="Астрономічна навігація – úkraínska" lang="uk" hreflang="uk" data-title="Астрономічна навігація" data-language-autonym="Українська" data-language-local-name="úkraínska" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%A4%A9%E6%96%87%E8%88%AA%E6%B5%B7" title="天文航海 – kínverska" lang="zh" hreflang="zh" data-title="天文航海" data-language-autonym="中文" data-language-local-name="kínverska" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%A4%A9%E6%96%87%E5%B0%8E%E8%88%AA" title="天文導航 – kantónska" lang="yue" hreflang="yue" data-title="天文導航" data-language-autonym="粵語" data-language-local-name="kantónska" 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/Q1063512#sitelinks-wikipedia" title="Breyta tungumálatenglum" class="wbc-editpage">Breyta tenglum</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Nafnrými"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Stjarnsiglingafr%C3%A6%C3%B0i" title="Sýna efnissíðuna [c]" accesskey="c"><span>Síða</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Spjall:Stjarnsiglingafr%C3%A6%C3%B0i&action=edit&redlink=1" rel="discussion" class="new" title="Spallsíða þessarar síðu (síða er ekki enn til) [t]" accesskey="t"><span>Spjall</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Breyta tungumálaafbrigði" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label 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class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Útlit</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">færa í hliðarstiku</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">fela</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" 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">Úr Wikipediu, frjálsa alfræðiritinu</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="is" dir="ltr"><figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Mynd:Sun-Moon_path.PNG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sun-Moon_path.PNG/220px-Sun-Moon_path.PNG" decoding="async" width="220" height="158" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sun-Moon_path.PNG/330px-Sun-Moon_path.PNG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sun-Moon_path.PNG/440px-Sun-Moon_path.PNG 2x" data-file-width="1076" data-file-height="773" /></a><figcaption>Rauði hringurinn eru þeir staðir þar sem sólin er í sömu hæð yfir sjóndeildarhringnum og blái hringurinn tunglið. Á öðrum hvorum staðnum sem hringirnir skerast er hnattstaða athugandans.</figcaption></figure> <p><b>Stjarnsiglingafræði</b> eða <b>stjörnufræðileg siglingafræði</b> er tækni til að taka <a href="/wiki/Sta%C3%B0ar%C3%A1kv%C3%B6r%C3%B0un" title="Staðarákvörðun">staðarákvörðun</a> út frá stöðu <a href="/wiki/S%C3%B3l" class="mw-disambig" title="Sól">sólar</a>, <a href="/wiki/Tungli%C3%B0" title="Tunglið">tungls</a>, <a href="/wiki/Pl%C3%A1neta" class="mw-redirect" title="Pláneta">plánetanna</a> í sólkerfinu eða þeim 57 <a href="/wiki/Lei%C3%B0arstjarna" class="mw-disambig" title="Leiðarstjarna">leiðarstjörnum</a> sem taldar eru upp á <a href="/w/index.php?title=Siglingaalmanak&action=edit&redlink=1" class="new" title="Siglingaalmanak (síða er ekki enn til)">siglinga-</a> og <a href="/w/index.php?title=Loftfer%C3%B0aalmanak&action=edit&redlink=1" class="new" title="Loftferðaalmanak (síða er ekki enn til)">loftferðaalmanaki</a>. Stjarnsiglingafræði hefur þróast í þúsundir ára og er enn í fullu gildi, þótt ný staðsetningartækni á borð við <a href="/wiki/GPS" class="mw-redirect" title="GPS">GPS</a> hafi að miklu leyti leyst hana af hólmi. </p><p>Stjarnsiglingafræði byggist á því að mæla horn himintungla miðað við <a href="/wiki/Sj%C3%B3ndeildarhringur" title="Sjóndeildarhringur">sjóndeildarhring</a> og reikna þannig út <a href="/w/index.php?title=Hnattsta%C3%B0a&action=edit&redlink=1" class="new" title="Hnattstaða (síða er ekki enn til)">hnattstöðu</a> athugandans. Á tilteknum tíma er tiltekið himintungl beint yfir ákveðnum punkti á jarðarkringlunni. Þessi punktur nefnist jarðstaða og hægt er að finna hana út með því að fletta upp í siglingaalmanakinu miðað við <a href="/wiki/Greenwich_Mean_Time" class="mw-redirect" title="Greenwich Mean Time">Greenwich Mean Time</a> sem þarf þá að vera þekktur. Með því að mæla hornið milli hnattarins og sjóndeildarhringsins er þá hægt að reikna út fjarlægð athugandans frá jarðstöðu hans með einfaldri <a href="/wiki/Hornafr%C3%A6%C3%B0i" title="Hornafræði">hornafræði</a> og nota það til að setja stöðulínu í hring utanum jarðstöðu himinhnattarins. Athugandinn er þá einhversstaðar á þeirri línu. Yfirleitt er miðað við skurðpunkt staðarlína þriggja til fimm stjarna til að draga úr skekkju. </p><p>Aðrar aðferðir til að reikna hnattstöðu eftir himintunglum miðast við notkun <a href="/wiki/Sextant" title="Sextant">sextants</a> eða annarra tækja til að taka hæð sólar á <a href="/wiki/H%C3%A1degi" title="Hádegi">hádegi</a>, en þá þarf GMT ekki að vera þekktur. </p> <style data-mw-deduplicate="TemplateStyles:r1870435">.mw-parser-output .t-stub{clear:both;background-color:#f9f9f9;border:1px solid #aaa;padding:5px;padding-left:10px;text-align:left;font-size:90%;margin-top:1em;color:black}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .t-stub{background-color:#0f0f0f;color:white}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .t-stub{background-color:#0f0f0f;color:white}}</style><div class="t-stub"><span typeof="mw:File"><a href="/wiki/Mynd:Puzzle_stub.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Puzzle_stub.svg/30px-Puzzle_stub.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Puzzle_stub.svg/45px-Puzzle_stub.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Puzzle_stub.svg/60px-Puzzle_stub.svg.png 2x" data-file-width="800" data-file-height="800" /></a></span>  <i>Þessi grein er <a href="/wiki/Wikipedia:Stubbur" title="Wikipedia:Stubbur">stubbur</a>. Þú getur hjálpað til með því að <span class="plainlinks"><a class="external text" href="https://is.wikipedia.org/w/index.php?title=Stjarnsiglingafr%C3%A6%C3%B0i&veaction=edit">bæta við greinina</a></span>.</i></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Sótt frá „<a dir="ltr" href="https://is.wikipedia.org/w/index.php?title=Stjarnsiglingafræði&oldid=1449422">https://is.wikipedia.org/w/index.php?title=Stjarnsiglingafræði&oldid=1449422</a>“</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Kerfiss%C3%AD%C3%B0a:Flokkar" title="Kerfissíða:Flokkar">Flokkar</a>: <ul><li><a href="/wiki/Flokkur:Siglingafr%C3%A6%C3%B0i" title="Flokkur:Siglingafræði">Siglingafræði</a></li><li><a href="/wiki/Flokkur:Stj%C3%B6rnufr%C3%A6%C3%B0i" title="Flokkur:Stjörnufræði">Stjörnufræði</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Falinn flokkur: <ul><li><a href="/wiki/Flokkur:Wikipedia:Stubbar" title="Flokkur:Wikipedia:Stubbar">Wikipedia:Stubbar</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Þessari síðu var síðast breytt 28. febrúar 2014, klukkan 15:02.</li> <li id="footer-info-copyright">Textinn er gefinn út samkvæmt <a href="/wiki/Wikipedia:H%C3%B6fundar%C3%A9ttur" title="Wikipedia:Höfundaréttur">Creative Commons Tilvísun-DeilaEins leyfi</a>. 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