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data-event-name="pinnable-header.vector-main-menu.unpin">απόκρυψη</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Πλοήγηση </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%9A%CF%8D%CF%81%CE%B9%CE%B1" title="Επισκεφθείτε την αρχική σελίδα [z]" accesskey="z"><span>Κύρια πύλη</span></a></li><li id="n-Θεματικές-πύλες" class="mw-list-item"><a href="/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%98%CE%AD%CE%BC%CE%B1%CF%84%CE%B1"><span>Θεματικές πύλες</span></a></li><li id="n-Featuredcontent" class="mw-list-item"><a href="/wiki/%CE%92%CE%B9%CE%BA%CE%B9%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CE%B9%CE%B1:%CE%A0%CF%81%CE%BF%CE%B2%CE%B5%CE%B2%CE%BB%CE%B7%CE%BC%CE%AD%CE%BD%CE%B1_%CE%BB%CE%AE%CE%BC%CE%BC%CE%B1%CF%84%CE%B1"><span>Προβεβλημένα λήμματα</span></a></li><li id="n-currentevents" class="mw-list-item"><a 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href="/w/index.php?title=%CE%95%CE%B9%CE%B4%CE%B9%CE%BA%CF%8C:%CE%94%CE%B7%CE%BC%CE%B9%CE%BF%CF%85%CF%81%CE%B3%CE%AF%CE%B1%CE%9B%CE%BF%CE%B3%CE%B1%CF%81%CE%B9%CE%B1%CF%83%CE%BC%CE%BF%CF%8D&returnto=%CE%A0%CF%8D%CE%BB%CE%B7%3A%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" title="Σας ενθαρρύνουμε να δημιουργήσετε ένα λογαριασμό και να συνδεθείτε· ωστόσο, δεν είναι υποχρεωτικό"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Δημιουργία λογαριασμού</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%CE%95%CE%B9%CE%B4%CE%B9%CE%BA%CF%8C:%CE%A3%CF%8D%CE%BD%CE%B4%CE%B5%CF%83%CE%B7%CE%A7%CF%81%CE%AE%CF%83%CF%84%CE%B7&returnto=%CE%A0%CF%8D%CE%BB%CE%B7%3A%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" title="Σας ενθαρρύνουμε να συνδεθείτε· ωστόσο, δεν είναι υποχρεωτικό [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> 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title="Συζήτηση σχετικά με τις αλλαγές που έγιναν από αυτή τη διεύθυνση IP [n]" accesskey="n"><span>Συζήτηση για αυτή την IP</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 id="mw-dismissablenotice-anonplace"></div><script>(function(){var node=document.getElementById("mw-dismissablenotice-anonplace");if(node){node.outerHTML="\u003Cdiv class=\"mw-dismissable-notice\"\u003E\u003Cdiv class=\"mw-dismissable-notice-close\"\u003E[\u003Ca tabindex=\"0\" role=\"button\"\u003Eκλείσιμο\u003C/a\u003E]\u003C/div\u003E\u003Cdiv class=\"mw-dismissable-notice-body\"\u003E\u003C!-- CentralNotice --\u003E\u003Cdiv id=\"localNotice\" data-nosnippet=\"\"\u003E\u003Cdiv class=\"sitenotice\" lang=\"el\" dir=\"ltr\"\u003E\u003Cdiv style=\"border: solid 1px #333; border-radius: 0.5em;box-shadow: 0 4px 4px #999; background:#FCFFE5; 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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-namespace">Πύλη</span><span class="mw-page-title-separator">:</span><span class="mw-page-title-main">Αστρονομία</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="Μεταβείτε σε ένα λήμμα σε άλλη γλώσσα. Διαθέσιμο σε 65 γλώσσες" > <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-65" 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">65 γλώσσες</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/Portaal:Sterrekunde" title="Portaal:Sterrekunde – Αφρικάανς" lang="af" hreflang="af" data-title="Portaal:Sterrekunde" data-language-autonym="Afrikaans" data-language-local-name="Αφρικάανς" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://ar.wikipedia.org/wiki/%D8%A8%D9%88%D8%A7%D8%A8%D8%A9:%D8%B9%D9%84%D9%85_%D8%A7%D9%84%D9%81%D9%84%D9%83" title="بوابة:علم الفلك – Αραβικά" lang="ar" hreflang="ar" data-title="بوابة:علم الفلك" data-language-autonym="العربية" data-language-local-name="Αραβικά" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A8%D9%88%D8%A7%D8%A8%D8%A9:%D8%B9%D9%84%D9%85_%D8%A7%D9%84%D9%81%D9%84%D9%83" title="بوابة:علم الفلك – Egyptian Arabic" lang="arz" hreflang="arz" data-title="بوابة:علم الفلك" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Portal:Astronomiya" title="Portal:Astronomiya – Αζερμπαϊτζανικά" lang="az" hreflang="az" data-title="Portal:Astronomiya" data-language-autonym="Azərbaycanca" data-language-local-name="Αζερμπαϊτζανικά" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D0%B0%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%BE%D0%BC%D1%96%D1%8F" title="Партал:Астраномія – Λευκορωσικά" lang="be" hreflang="be" data-title="Партал:Астраномія" data-language-autonym="Беларуская" data-language-local-name="Λευκορωσικά" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F" title="Портал:Астрономия – Βουλγαρικά" lang="bg" hreflang="bg" data-title="Портал:Астрономия" data-language-autonym="Български" data-language-local-name="Βουλγαρικά" 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%AA%E0%A7%8D%E0%A6%B0%E0%A6%AC%E0%A7%87%E0%A6%B6%E0%A6%A6%E0%A7%8D%E0%A6%AC%E0%A6%BE%E0%A6%B0:%E0%A6%9C%E0%A7%8D%E0%A6%AF%E0%A7%8B%E0%A6%A4%E0%A6%BF%E0%A6%B0%E0%A7%8D%E0%A6%AC%E0%A6%BF%E0%A6%9C%E0%A7%8D%E0%A6%9E%E0%A6%BE%E0%A6%A8" title="প্রবেশদ্বার:জ্যোতির্বিজ্ঞান – Βεγγαλικά" lang="bn" hreflang="bn" data-title="প্রবেশদ্বার:জ্যোতির্বিজ্ঞান" data-language-autonym="বাংলা" data-language-local-name="Βεγγαλικά" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Portal:Astronomija" title="Portal:Astronomija – Βοσνιακά" lang="bs" hreflang="bs" data-title="Portal:Astronomija" data-language-autonym="Bosanski" data-language-local-name="Βοσνιακά" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Portal:Astronomia" title="Portal:Astronomia – Καταλανικά" lang="ca" hreflang="ca" data-title="Portal:Astronomia" data-language-autonym="Català" data-language-local-name="Καταλανικά" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AF%DB%95%D8%B1%D9%88%D8%A7%D8%B2%DB%95:%DA%AF%DB%95%D8%B1%D8%AF%D9%88%D9%88%D9%86" title="دەروازە:گەردوون – Κεντρικά Κουρδικά" lang="ckb" hreflang="ckb" data-title="دەروازە:گەردوون" data-language-autonym="کوردی" data-language-local-name="Κεντρικά Κουρδικά" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-crh mw-list-item"><a href="https://crh.wikipedia.org/wiki/Vikipediya:Portal:Astronomiya" title="Vikipediya:Portal:Astronomiya – Τουρκικά Κριμαίας" lang="crh" hreflang="crh" data-title="Vikipediya:Portal:Astronomiya" data-language-autonym="Qırımtatarca" data-language-local-name="Τουρκικά Κριμαίας" class="interlanguage-link-target"><span>Qırımtatarca</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Port%C3%A1l:Astronomie" title="Portál:Astronomie – Τσεχικά" lang="cs" hreflang="cs" data-title="Portál:Astronomie" data-language-autonym="Čeština" data-language-local-name="Τσεχικά" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Portal:Astronomi" title="Portal:Astronomi – Δανικά" lang="da" hreflang="da" data-title="Portal:Astronomi" data-language-autonym="Dansk" data-language-local-name="Δανικά" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://de.wikipedia.org/wiki/Portal:Astronomie" title="Portal:Astronomie – Γερμανικά" lang="de" hreflang="de" data-title="Portal:Astronomie" data-language-autonym="Deutsch" data-language-local-name="Γερμανικά" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Portal:Astronomy" title="Portal:Astronomy – Αγγλικά" lang="en" hreflang="en" data-title="Portal:Astronomy" data-language-autonym="English" data-language-local-name="Αγγλικά" 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/Portalo:Astronomio" title="Portalo:Astronomio – Εσπεράντο" lang="eo" hreflang="eo" data-title="Portalo:Astronomio" data-language-autonym="Esperanto" data-language-local-name="Εσπεράντο" 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/Portal:Astronom%C3%ADa" title="Portal:Astronomía – Ισπανικά" lang="es" hreflang="es" data-title="Portal:Astronomía" data-language-autonym="Español" data-language-local-name="Ισπανικά" 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/Portaal:Astronoomia" title="Portaal:Astronoomia – Εσθονικά" lang="et" hreflang="et" data-title="Portaal:Astronoomia" data-language-autonym="Eesti" data-language-local-name="Εσθονικά" 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/Atari:Astronomia" title="Atari:Astronomia – Βασκικά" lang="eu" hreflang="eu" data-title="Atari:Astronomia" data-language-autonym="Euskara" data-language-local-name="Βασκικά" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://fa.wikipedia.org/wiki/%D8%AF%D8%B1%DA%AF%D8%A7%D9%87:%D8%A7%D8%AE%D8%AA%D8%B1%D8%B4%D9%86%D8%A7%D8%B3%DB%8C" title="درگاه:اخترشناسی – Περσικά" lang="fa" hreflang="fa" data-title="درگاه:اخترشناسی" data-language-autonym="فارسی" data-language-local-name="Περσικά" 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/Teemasivu:T%C3%A4htitiede" title="Teemasivu:Tähtitiede – Φινλανδικά" lang="fi" hreflang="fi" data-title="Teemasivu:Tähtitiede" data-language-autonym="Suomi" data-language-local-name="Φινλανδικά" 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/Portail:Astronomie" title="Portail:Astronomie – Γαλλικά" lang="fr" hreflang="fr" data-title="Portail:Astronomie" data-language-autonym="Français" data-language-local-name="Γαλλικά" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Ok%E1%BA%BDndusu:Mbyjakuaa" title="Okẽndusu:Mbyjakuaa – Γκουαρανί" lang="gn" hreflang="gn" data-title="Okẽndusu:Mbyjakuaa" data-language-autonym="Avañe'ẽ" data-language-local-name="Γκουαρανί" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A4%D7%95%D7%A8%D7%98%D7%9C:%D7%9E%D7%93%D7%A2%D7%99_%D7%94%D7%97%D7%9C%D7%9C" title="פורטל:מדעי החלל – Εβραϊκά" lang="he" hreflang="he" data-title="פורטל:מדעי החלל" data-language-autonym="עברית" data-language-local-name="Εβραϊκά" 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%AA%E0%A5%8D%E0%A4%B0%E0%A4%B5%E0%A5%87%E0%A4%B6%E0%A4%A6%E0%A5%8D%E0%A4%B5%E0%A4%BE%E0%A4%B0:%E0%A4%96%E0%A4%97%E0%A5%8B%E0%A4%B2%E0%A4%B6%E0%A4%BE%E0%A4%B8%E0%A5%8D%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="प्रवेशद्वार:खगोलशास्त्र – Χίντι" lang="hi" hreflang="hi" data-title="प्रवेशद्वार:खगोलशास्त्र" data-language-autonym="हिन्दी" data-language-local-name="Χίντι" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Port%C3%A1l:Csillag%C3%A1szat" title="Portál:Csillagászat – Ουγγρικά" lang="hu" hreflang="hu" data-title="Portál:Csillagászat" data-language-autonym="Magyar" data-language-local-name="Ουγγρικά" 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%8A%D5%B8%D6%80%D5%BF%D5%A1%D5%AC:%D4%B1%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="Պորտալ:Աստղագիտություն – Αρμενικά" lang="hy" hreflang="hy" data-title="Պորտալ:Աստղագիտություն" data-language-autonym="Հայերեն" data-language-local-name="Αρμενικά" 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/Portal:Astronomi" title="Portal:Astronomi – Ινδονησιακά" lang="id" hreflang="id" data-title="Portal:Astronomi" data-language-autonym="Bahasa Indonesia" data-language-local-name="Ινδονησιακά" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Portale:Astronomia" title="Portale:Astronomia – Ιταλικά" lang="it" hreflang="it" data-title="Portale:Astronomia" data-language-autonym="Italiano" data-language-local-name="Ιταλικά" 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/Portal:%E5%A4%A9%E6%96%87%E5%AD%A6" title="Portal:天文学 – Ιαπωνικά" lang="ja" hreflang="ja" data-title="Portal:天文学" data-language-autonym="日本語" data-language-local-name="Ιαπωνικά" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9E%E1%83%9D%E1%83%A0%E1%83%A2%E1%83%90%E1%83%9A%E1%83%98:%E1%83%90%E1%83%A1%E1%83%A2%E1%83%A0%E1%83%9D%E1%83%9C%E1%83%9D%E1%83%9B%E1%83%98%E1%83%90" title="პორტალი:ასტრონომია – Γεωργιανά" lang="ka" hreflang="ka" data-title="პორტალი:ასტრონომია" data-language-autonym="ქართული" data-language-local-name="Γεωργιανά" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F" title="Портал:Астрономия – Καζακικά" lang="kk" hreflang="kk" data-title="Портал:Астрономия" data-language-autonym="Қазақша" data-language-local-name="Καζακικά" 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/%ED%8F%AC%ED%84%B8:%EC%B2%9C%EB%AC%B8%ED%95%99" title="포털:천문학 – Κορεατικά" lang="ko" hreflang="ko" data-title="포털:천문학" data-language-autonym="한국어" data-language-local-name="Κορεατικά" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Portal:Astronomie" title="Portal:Astronomie – Λουξεμβουργιανά" lang="lb" hreflang="lb" data-title="Portal:Astronomie" data-language-autonym="Lëtzebuergesch" data-language-local-name="Λουξεμβουργιανά" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Vikisritis:Astronomija" title="Vikisritis:Astronomija – Λιθουανικά" lang="lt" hreflang="lt" data-title="Vikisritis:Astronomija" data-language-autonym="Lietuvių" data-language-local-name="Λιθουανικά" 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/Port%C4%81ls:Astronomija" title="Portāls:Astronomija – Λετονικά" lang="lv" hreflang="lv" data-title="Portāls:Astronomija" data-language-autonym="Latviešu" data-language-local-name="Λετονικά" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%98%D0%B0" title="Портал:Астрономија – Σλαβομακεδονικά" lang="mk" hreflang="mk" data-title="Портал:Астрономија" data-language-autonym="Македонски" data-language-local-name="Σλαβομακεδονικά" 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%95%E0%B4%B5%E0%B4%BE%E0%B4%9F%E0%B4%82:%E0%B4%9C%E0%B5%8D%E0%B4%AF%E0%B5%8B%E0%B4%A4%E0%B4%BF%E0%B4%83%E0%B4%B6%E0%B4%BE%E0%B4%B8%E0%B5%8D%E0%B4%A4%E0%B5%8D%E0%B4%B0%E0%B4%82" title="കവാടം:ജ്യോതിഃശാസ്ത്രം – Μαλαγιαλαμικά" lang="ml" hreflang="ml" data-title="കവാടം:ജ്യോതിഃശാസ്ത്രം" data-language-autonym="മലയാളം" data-language-local-name="Μαλαγιαλαμικά" 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/Portal:Astronomi" title="Portal:Astronomi – Μαλαισιανά" lang="ms" hreflang="ms" data-title="Portal:Astronomi" data-language-autonym="Bahasa Melayu" data-language-local-name="Μαλαισιανά" 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/Portaal:Astronomie" title="Portaal:Astronomie – Ολλανδικά" lang="nl" hreflang="nl" data-title="Portaal:Astronomie" data-language-autonym="Nederlands" data-language-local-name="Ολλανδικά" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://no.wikipedia.org/wiki/Portal:Astronomi" title="Portal:Astronomi – Νορβηγικά Μποκμάλ" lang="nb" hreflang="nb" data-title="Portal:Astronomi" data-language-autonym="Norsk bokmål" data-language-local-name="Νορβηγικά Μποκμάλ" 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/Portal:Astronomia" title="Portal:Astronomia – Πολωνικά" lang="pl" hreflang="pl" data-title="Portal:Astronomia" data-language-autonym="Polski" data-language-local-name="Πολωνικά" 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/%D8%A8%D9%88%D8%A2:_%D8%AA%D8%A7%D8%B1%DB%81_%D9%BE%DA%91%DA%BE%D8%AA" title="بوآ: تارہ پڑھت – Western Punjabi" lang="pnb" hreflang="pnb" data-title="بوآ: تارہ پڑھت" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%AA%D8%A7%D9%86%D8%A8%D9%87:%D8%B3%D8%AA%D9%88%D8%B1%D9%BE%D9%88%D9%87%D9%86%D9%87" title="تانبه:ستورپوهنه – Πάστο" lang="ps" hreflang="ps" data-title="تانبه:ستورپوهنه" data-language-autonym="پښتو" data-language-local-name="Πάστο" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Portal:Astronomia" title="Portal:Astronomia – Πορτογαλικά" lang="pt" hreflang="pt" data-title="Portal:Astronomia" data-language-autonym="Português" data-language-local-name="Πορτογαλικά" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Punku_p%27anqa:_Quyllur_yachay" title="Punku p'anqa: Quyllur yachay – Κέτσουα" lang="qu" hreflang="qu" data-title="Punku p'anqa: Quyllur yachay" data-language-autonym="Runa Simi" data-language-local-name="Κέτσουα" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Portal:Astronomie" title="Portal:Astronomie – Ρουμανικά" lang="ro" hreflang="ro" data-title="Portal:Astronomie" data-language-autonym="Română" data-language-local-name="Ρουμανικά" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F" title="Портал:Астрономия – Ρωσικά" lang="ru" hreflang="ru" data-title="Портал:Астрономия" data-language-autonym="Русский" data-language-local-name="Ρωσικά" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%A8%D8%A7%D8%A8:%D9%81%D9%84%DA%AA%D9%8A%D8%A7%D8%AA" title="باب:فلڪيات – Σίντι" lang="sd" hreflang="sd" data-title="باب:فلڪيات" data-language-autonym="سنڌي" data-language-local-name="Σίντι" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%AF%E0%B7%8A%E0%B7%80%E0%B7%8F%E0%B6%BB%E0%B6%BA:%E0%B6%AD%E0%B7%8F%E0%B6%BB%E0%B6%9A%E0%B7%8F_%E0%B7%80%E0%B7%92%E0%B6%AF%E0%B7%8A%E2%80%8D%E0%B6%BA%E0%B7%8F%E0%B7%80" title="ද්වාරය:තාරකා විද්‍යාව – Σινχαλεζικά" lang="si" hreflang="si" data-title="ද්වාරය:තාරකා විද්‍යාව" data-language-autonym="සිංහල" data-language-local-name="Σινχαλεζικά" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Port%C3%A1l:Astron%C3%B3mia" title="Portál:Astronómia – Σλοβακικά" lang="sk" hreflang="sk" data-title="Portál:Astronómia" data-language-autonym="Slovenčina" data-language-local-name="Σλοβακικά" 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/Portal:Astronomija" title="Portal:Astronomija – Σλοβενικά" lang="sl" hreflang="sl" data-title="Portal:Astronomija" data-language-autonym="Slovenščina" data-language-local-name="Σλοβενικά" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Portal:Cilmi_Fallag" title="Portal:Cilmi Fallag – Σομαλικά" lang="so" hreflang="so" data-title="Portal:Cilmi Fallag" data-language-autonym="Soomaaliga" data-language-local-name="Σομαλικά" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%98%D0%B0" title="Портал:Астрономија – Σερβικά" lang="sr" hreflang="sr" data-title="Портал:Астрономија" data-language-autonym="Српски / srpski" data-language-local-name="Σερβικά" 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/Portal:Astronomi" title="Portal:Astronomi – Σουηδικά" lang="sv" hreflang="sv" data-title="Portal:Astronomi" data-language-autonym="Svenska" data-language-local-name="Σουηδικά" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AE%B2%E0%AF%88%E0%AE%B5%E0%AE%BE%E0%AE%9A%E0%AE%B2%E0%AF%8D:%E0%AE%B5%E0%AE%BE%E0%AE%A9%E0%AE%BF%E0%AE%AF%E0%AE%B2%E0%AF%8D" title="வலைவாசல்:வானியல் – Ταμιλικά" lang="ta" hreflang="ta" data-title="வலைவாசல்:வானியல்" data-language-autonym="தமிழ்" data-language-local-name="Ταμιλικά" 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%B8%AA%E0%B8%96%E0%B8%B2%E0%B8%99%E0%B8%B5%E0%B8%A2%E0%B9%88%E0%B8%AD%E0%B8%A2:%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="สถานีย่อย:ดาราศาสตร์ – Ταϊλανδικά" lang="th" hreflang="th" data-title="สถานีย่อย:ดาราศาสตร์" data-language-autonym="ไทย" data-language-local-name="Ταϊλανδικά" 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/Portal:Astronomi" title="Portal:Astronomi – Τουρκικά" lang="tr" hreflang="tr" data-title="Portal:Astronomi" data-language-autonym="Türkçe" data-language-local-name="Τουρκικά" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F" title="Портал:Астрономия – Ταταρικά" lang="tt" hreflang="tt" data-title="Портал:Астрономия" data-language-autonym="Татарча / tatarça" data-language-local-name="Ταταρικά" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%BE%D1%80%D1%82%D0%B0%D0%BB:%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D1%96%D1%8F" title="Портал:Астрономія – Ουκρανικά" lang="uk" hreflang="uk" data-title="Портал:Астрономія" data-language-autonym="Українська" data-language-local-name="Ουκρανικά" 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/%D8%A8%D8%A7%D8%A8:%D9%81%D9%84%DA%A9%DB%8C%D8%A7%D8%AA" title="باب:فلکیات – Ούρντου" lang="ur" hreflang="ur" data-title="باب:فلکیات" data-language-autonym="اردو" data-language-local-name="Ούρντου" 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/Portal:Astronomiya" title="Portal:Astronomiya – Ουζμπεκικά" lang="uz" hreflang="uz" data-title="Portal:Astronomiya" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Ουζμπεκικά" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi badge-Q17580674 badge-featuredportal mw-list-item" title="προβεβλημένη πύλη"><a href="https://vi.wikipedia.org/wiki/C%E1%BB%95ng_th%C3%B4ng_tin:Thi%C3%AAn_v%C4%83n_h%E1%BB%8Dc" title="Cổng thông tin:Thiên văn học – Βιετναμικά" lang="vi" hreflang="vi" data-title="Cổng thông tin:Thiên văn học" data-language-autonym="Tiếng Việt" data-language-local-name="Βιετναμικά" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Portal:%E5%A4%A9%E6%96%87%E5%AD%A6" title="Portal:天文学 – 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id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="el" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r10665413">.mw-parser-output #firstHeading{display:none}.mw-parser-output #pylh_2019_kefalida{background:linear-gradient(to bottom,#fff,#e8f2f8);border-bottom:solid 1px #a8d7fc;margin-bottom:1rem}.mw-parser-output #pylh_2019_kordela{background:url("https://upload.wikimedia.org/wikipedia/commons/a/aa/Wikipedia-logo-v2-o50.svg")no-repeat -110px -15px;background-size:300px 300px;padding:1.5rem 1rem 1rem;font-family:"Open Sans",Sans-serif}.mw-parser-output #pylh_2019_bloc-titlos{display:inline-block;margin-left:14rem;margin-bottom:1rem;text-align:left;line-height:1.6;color:#457}.mw-parser-output #pylh_2019_bloc-titlos>h2{margin:0;padding:0;border:none;font-size:200%;font-weight:bold;font-family:"Open Sans",Sans-serif;color:#457}.mw-parser-output #pylh_2019_bloc-titlos>p{margin:0;padding:0;font-size:95%}.mw-parser-output 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.assistant{background-image:url("//upload.wikimedia.org/wikipedia/commons/6/67/Nuvola_apps_khelpcenter_25%25.png");background-repeat:no-repeat;margin-bottom:1em}@media(min-width:982px){.mw-parser-output #pylh_2019_periexomeno{display:flex}.mw-parser-output #pylh_2019_periexomeno .pylh-aristera,.mw-parser-output #pylh_2019_periexomeno .pylh-dexia{display:flex;flex-direction:column}.mw-parser-output #pylh_2019_periexomeno .pylh-dexia{min-width:40%}.mw-parser-output .pylh_2019_plaisio:nth-child(1){flex-grow:1}.mw-parser-output .pylh_2019_plaisio:nth-child(2){flex-grow:2}.mw-parser-output .pylh_2019_plaisio:nth-child(3){flex-grow:3}.mw-parser-output .pylh-aristera .pylh_2019_plaisio{margin-right:1rem}}html.skin-theme-clientpref-night .mw-parser-output .pylh_2019_plaisio table{background-color:transparent}html.skin-theme-clientpref-night .mw-parser-output #pylh_2019_kefalida{background:var(--background-color-notice-subtle,#202122);color:var(--color-emphasized,#f8f9fa)}</style> <style data-mw-deduplicate="TemplateStyles:r8080010">.mw-parser-output .pylh_2019_plaisio{border:1px solid #aaaaaa;vertical-align:top;background:#EFF9F4;color:black;margin-bottom:1rem;margin-top:0;padding:5px;padding-top:.3em}.mw-parser-output .pylh_2019_plaisio_header{border:1px solid #aaaaaa;background:#A1CEB7;color:white;text-align:center;font-weight:bold;font-size:100%;margin:-5px;margin-bottom:5px;padding:5px}.mw-parser-output .pylh_2019_pied{float:right}</style> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Πύλη Αστρονομία <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CE%B9%CF%83%CE%B1%CE%B3%CF%89%CE%B3%CE%AE"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CE%B9%CF%83%CE%B1%CE%B3%CF%89%CE%B3%CE%AE&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <figure class="mw-halign-left" typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:P_space.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/8/8b/P_space.png" decoding="async" width="80" height="71" class="mw-file-element" data-file-width="77" data-file-height="68" /></a><figcaption></figcaption></figure> <p>H <b><a href="/wiki/%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" title="Αστρονομία">αστρονομία</a></b> είναι η παρατήρηση και η ερμηνεία των φαινομένων που λαμβάνουν χώρα στον ουράνιο χώρο πέρα από την <a href="/wiki/%CE%93%CE%B7" title="Γη">Γη</a> και την <a href="/wiki/%CE%91%CF%84%CE%BC%CF%8C%CF%83%CF%86%CE%B1%CE%B9%CF%81%CE%B1" title="Ατμόσφαιρα">ατμόσφαιρά</a> της. Μελετά την προέλευση, την εξέλιξη, και τις φυσικές και χημικές ιδιότητες των <a href="/wiki/%CE%9F%CF%85%CF%81%CE%AC%CE%BD%CE%B9%CE%BF_%CF%83%CF%8E%CE%BC%CE%B1" title="Ουράνιο σώμα">ουρανίων σωμάτων</a> που μπορούν να παρατηρηθούν (και είναι εκτός των ορίων της ατμόσφαιρας), καθώς και των διεργασιών που περιλαμβάνουν αυτές. </p> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> <div id="pylh_2019_periexomeno"> <div class="pylh-aristera"> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Επιλεγμένο λήμμα <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CE%BB%CE%B5%CE%B3%CE%BC%CE%AD%CE%BD%CE%BF_%CE%BB%CE%AE%CE%BC%CE%BC%CE%B1"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CE%BB%CE%B5%CE%B3%CE%BC%CE%AD%CE%BD%CE%BF_%CE%BB%CE%AE%CE%BC%CE%BC%CE%B1&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:Making_a_Nova.jpg" class="mw-file-description" title="Καλλιτεχνική απόδοση της δημιουργίας ενός καινοφανούς αστέρα (nova)."><img alt="Καλλιτεχνική απόδοση της δημιουργίας ενός καινοφανούς αστέρα (nova)." src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Making_a_Nova.jpg/130px-Making_a_Nova.jpg" decoding="async" width="130" height="88" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Making_a_Nova.jpg/195px-Making_a_Nova.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/5/5d/Making_a_Nova.jpg 2x" data-file-width="250" data-file-height="169" /></a><figcaption>Καλλιτεχνική απόδοση της δημιουργίας ενός καινοφανούς αστέρα (nova).</figcaption></figure> <p>Από την αρχαιότητα είχε γίνει αντιληπτή η αιφνίδια εμφάνιση «νέων άστρων» στον ουρανό, και μέχρι σήμερα τους δίνεται το αντίστοιχο όνομα: <b><a href="/wiki/%CE%9A%CE%B1%CE%B9%CE%BD%CE%BF%CF%86%CE%B1%CE%BD%CE%B5%CE%AF%CF%82_%CE%B1%CF%83%CF%84%CE%AD%CF%81%CE%B5%CF%82" class="mw-redirect" title="Καινοφανείς αστέρες">καινοφανείς αστέρες</a></b> ή <b>(stellae) novae</b> («νέοι αστέρες»). Σε ελάχιστες περιπτώσεις οι νέοι αστέρες ήταν τόσο φωτεινοί, ώστε διακρίνονταν με γυμνό μάτι και την ημέρα, οπότε ονομάζονταν supernovae («υπερνέοι») ή <a href="/wiki/%CE%A5%CF%80%CE%B5%CF%81%CE%BA%CE%B1%CE%B9%CE%BD%CE%BF%CF%86%CE%B1%CE%BD%CE%B5%CE%AF%CF%82_%CE%B1%CF%83%CF%84%CE%AD%CF%81%CE%B5%CF%82" class="mw-redirect" title="Υπερκαινοφανείς αστέρες">υπερκαινοφανείς αστέρες</a>. Οι όροι αυτοί διατηρούνται σήμερα, αλλά έχουν προσλάβει διαφορετική έννοια και αναφέρονται σε δύο ξεχωριστές ομάδες φυσικών διαδικασιών. Υπό τις σημερινές σημασίες οι ελληνικοί όροι «καινοφανής» και «υπερκαινοφανής» είναι πολύ ορθότεροι των <a href="/wiki/%CE%9B%CE%B1%CF%84%CE%B9%CE%BD%CE%B9%CE%BA%CE%AC" class="mw-redirect" title="Λατινικά">λατινικών</a>, επειδή αναφέρονται σε αντικείμενα που προϋπήρχαν αόρατα στο γυμνό μάτι και απλώς «φάνηκαν» όταν η <a href="/wiki/%CE%9B%CE%B1%CE%BC%CF%80%CF%81%CF%8C%CF%84%CE%B7%CF%84%CE%B1" title="Λαμπρότητα">λαμπρότητά</a> τους αυξήθηκε απότομα κατά χιλιάδες ως δεκάδες χιλιάδες (καινοφανείς) ή κατά εκατομμύρια φορές (υπερκαινοφανείς). Παραδόξως, οι καινοφανείς προκαλούνται από ένα και μόνο ειδικό τύπο ουράνιων σωμάτων, ενώ οι συγκριτικά ελάχιστοι υπερκαινοφανείς οφείλονται σε δύο διαφορετικούς μηχανισμούς. </p> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Επιλεγμένη εικόνα <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CE%BB%CE%B5%CE%B3%CE%BC%CE%AD%CE%BD%CE%B7_%CE%B5%CE%B9%CE%BA%CF%8C%CE%BD%CE%B1"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CE%BB%CE%B5%CE%B3%CE%BC%CE%AD%CE%BD%CE%B7_%CE%B5%CE%B9%CE%BA%CF%8C%CE%BD%CE%B1&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <div style="text-align:center;"><span typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:Olympus_Mons_caldera.jpg" class="mw-file-description" title="Olympus Mons"><img alt="Olympus Mons" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Olympus_Mons_caldera.jpg/300px-Olympus_Mons_caldera.jpg" decoding="async" width="300" height="247" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Olympus_Mons_caldera.jpg/450px-Olympus_Mons_caldera.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/6/67/Olympus_Mons_caldera.jpg 2x" data-file-width="454" data-file-height="374" /></a></span><br />Οι <a href="/wiki/%CE%9A%CE%B1%CE%BB%CE%BD%CF%84%CE%AD%CF%81%CE%B1" class="mw-redirect" title="Καλντέρα">καλντέρες</a> στην κορυφή του ηφαίστειου <a href="/wiki/Olympus_Mons" class="mw-redirect" title="Olympus Mons">Όλυμπος</a> στον πλανήτη <a href="/wiki/%CE%86%CF%81%CE%B7%CF%82_(%CF%80%CE%BB%CE%B1%CE%BD%CE%AE%CF%84%CE%B7%CF%82)" title="Άρης (πλανήτης)">Άρη</a>, το ψηλότερο βουνό στο ηλιακό σύστημα.<br />Φωτογραφία: <a href="/wiki/NASA" title="NASA">NASA</a> </div> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> </div> <div class="pylh-dexia"> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Κατηγορίες <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B5%CF%82"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B5%CF%82&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <div class="CategoryTreeTag" data-ct-options="{"mode":0,"hideprefix":20,"showcount":false,"namespaces":false,"notranslations":false}"><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομία" data-ct-loaded="1" aria-expanded="true"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" title="Κατηγορία:Αστρονομία">Αστρονομία</a></bdi></div><div class="CategoryTreeChildren"><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονόμοι" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CF%8C%CE%BC%CE%BF%CE%B9" title="Κατηγορία:Αστρονόμοι">Αστρονόμοι</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%92%CE%B9%CE%B2%CE%BB%CE%AF%CE%B1_%CE%B1%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1%CF%82" title="Κατηγορία:Βιβλία αστρονομίας">Βιβλία αστρονομίας</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Διάστημα" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%94%CE%B9%CE%AC%CF%83%CF%84%CE%B7%CE%BC%CE%B1" title="Κατηγορία:Διάστημα">Διάστημα</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Δομές_μεγάλης_κλίμακας_του_κόσμου" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%94%CE%BF%CE%BC%CE%AD%CF%82_%CE%BC%CE%B5%CE%B3%CE%AC%CE%BB%CE%B7%CF%82_%CE%BA%CE%BB%CE%AF%CE%BC%CE%B1%CE%BA%CE%B1%CF%82_%CF%84%CE%BF%CF%85_%CE%BA%CF%8C%CF%83%CE%BC%CE%BF%CF%85" title="Κατηγορία:Δομές μεγάλης κλίμακας του κόσμου">Δομές μεγάλης κλίμακας του κόσμου</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%AD%CF%82_%CE%B8%CE%B5%CF%89%CF%81%CE%AF%CE%B5%CF%82" title="Κατηγορία:Αστρονομικές θεωρίες">Αστρονομικές θεωρίες</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Ιστορία_της_αστρονομίας" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%99%CF%83%CF%84%CE%BF%CF%81%CE%AF%CE%B1_%CF%84%CE%B7%CF%82_%CE%B1%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1%CF%82" title="Κατηγορία:Ιστορία της αστρονομίας">Ιστορία της αστρονομίας</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομικοί_κατάλογοι" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%BF%CE%AF_%CE%BA%CE%B1%CF%84%CE%AC%CE%BB%CE%BF%CE%B3%CE%BF%CE%B9" title="Κατηγορία:Αστρονομικοί κατάλογοι">Αστρονομικοί κατάλογοι</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Κλάδοι_της_αστρονομίας" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%9A%CE%BB%CE%AC%CE%B4%CE%BF%CE%B9_%CF%84%CE%B7%CF%82_%CE%B1%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1%CF%82" title="Κατηγορία:Κλάδοι της αστρονομίας">Κλάδοι της αστρονομίας</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομία-επέκταση" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1-%CE%B5%CF%80%CE%AD%CE%BA%CF%84%CE%B1%CF%83%CE%B7" title="Κατηγορία:Αστρονομία-επέκταση">Αστρονομία-επέκταση</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομικά_όργανα" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%AC_%CF%8C%CF%81%CE%B3%CE%B1%CE%BD%CE%B1" title="Κατηγορία:Αστρονομικά όργανα">Αστρονομικά όργανα</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομικές_οργανώσεις" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%AD%CF%82_%CE%BF%CF%81%CE%B3%CE%B1%CE%BD%CF%8E%CF%83%CE%B5%CE%B9%CF%82" title="Κατηγορία:Αστρονομικές οργανώσεις">Αστρονομικές οργανώσεις</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Ουράνια_σώματα" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%9F%CF%85%CF%81%CE%AC%CE%BD%CE%B9%CE%B1_%CF%83%CF%8E%CE%BC%CE%B1%CF%84%CE%B1" title="Κατηγορία:Ουράνια σώματα">Ουράνια σώματα</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Ουράνια_φαινόμενα" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%9F%CF%85%CF%81%CE%AC%CE%BD%CE%B9%CE%B1_%CF%86%CE%B1%CE%B9%CE%BD%CF%8C%CE%BC%CE%B5%CE%BD%CE%B1" title="Κατηγορία:Ουράνια φαινόμενα">Ουράνια φαινόμενα</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeBullet"><a class="CategoryTreeToggle" data-ct-title="Αστρονομικά_συστήματα_ταξινόμησης" aria-expanded="false"></a> </span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%B9%CE%BA%CE%AC_%CF%83%CF%85%CF%83%CF%84%CE%AE%CE%BC%CE%B1%CF%84%CE%B1_%CF%84%CE%B1%CE%BE%CE%B9%CE%BD%CF%8C%CE%BC%CE%B7%CF%83%CE%B7%CF%82" title="Κατηγορία:Αστρονομικά συστήματα ταξινόμησης">Αστρονομικά συστήματα ταξινόμησης</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div><div class="CategoryTreeSection"><div class="CategoryTreeItem"><span class="CategoryTreeEmptyBullet"></span> <bdi dir="ltr"><a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%A7%CF%81%CF%8C%CE%BD%CE%BF%CF%82_%CF%83%CF%84%CE%B7%CE%BD_%CE%B1%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" title="Κατηγορία:Χρόνος στην αστρονομία">Χρόνος στην αστρονομία</a></bdi></div><div class="CategoryTreeChildren" style="display:none"></div></div></div></div></div> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Τι μπορείτε να κάνετε <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%A4%CE%B9_%CE%BC%CF%80%CE%BF%CF%81%CE%B5%CE%AF%CF%84%CE%B5_%CE%BD%CE%B1_%CE%BA%CE%AC%CE%BD%CE%B5%CF%84%CE%B5"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%A4%CE%B9_%CE%BC%CF%80%CE%BF%CF%81%CE%B5%CE%AF%CF%84%CE%B5_%CE%BD%CE%B1_%CE%BA%CE%AC%CE%BD%CE%B5%CF%84%CE%B5&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <ul><li><b>Επεκτείνετε ένα από τα </b> <a href="/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1-%CE%B5%CF%80%CE%AD%CE%BA%CF%84%CE%B1%CF%83%CE%B7" title="Κατηγορία:Αστρονομία-επέκταση">λήμματα αστρονομίας που χρειάζονται επέκταση</a>.</li></ul> <ul><li><b>Λάβετε μέρος στην</b> <a href="/wiki/%CE%92%CE%B9%CE%BA%CE%B9%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CE%B9%CE%B1:%CE%92%CE%B9%CE%BA%CE%B9%CE%B5%CF%80%CE%B9%CF%87%CE%B5%CE%AF%CF%81%CE%B7%CF%83%CE%B7_%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" class="mw-redirect" title="Βικιπαίδεια:Βικιεπιχείρηση Αστρονομία">Βικιεπιχείρηση Αστρονομία</a>.</li></ul> <p><small>(αν θέλετε να προτείνετε κάποιο θέμα σχετικά με την Αστρονομία, μπορείτε να απευθυνθείτε στην <a href="/wiki/%CE%92%CE%B9%CE%BA%CE%B9%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CE%B9%CE%B1:%CE%92%CE%B9%CE%BA%CE%B9%CE%B5%CF%80%CE%B9%CF%87%CE%B5%CE%AF%CF%81%CE%B7%CF%83%CE%B7_%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%91%CE%B3%CE%BF%CF%81%CE%AC" class="mw-redirect" title="Βικιπαίδεια:Βικιεπιχείρηση Αστρονομία/Αγορά">σελίδα συζήτησης της Βικιεπιχείρησης Αστρονομία</a>)</small> </p> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Δείτε επίσης <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CF%80%CE%BB%CE%AD%CE%BF%CE%BD_%CF%85%CE%BB%CE%B9%CE%BA%CF%8C"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B7:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1/%CE%95%CF%80%CE%B9%CF%80%CE%BB%CE%AD%CE%BF%CE%BD_%CF%85%CE%BB%CE%B9%CE%BA%CF%8C&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <dl><dt>Σχετικές πύλες</dt> <dd></dd></dl> <ul><li><a href="/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%94%CE%B9%CE%AC%CF%83%CF%84%CE%B7%CE%BC%CE%B1" title="Πύλη:Διάστημα">Πύλη:Διάστημα</a></li></ul> <dl><dt>Σχετικά με την Αστρονομία, μπορείτε να δείτε και στα παρακάτω αδελφικά της Βικιπαίδειας εγχειρήματα</dt> <dd></dd></dl> <ul><li><span typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:Wiktionary-logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Wiktionary-logo.svg/20px-Wiktionary-logo.svg.png" decoding="async" width="20" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Wiktionary-logo.svg/30px-Wiktionary-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Wiktionary-logo.svg/40px-Wiktionary-logo.svg.png 2x" data-file-width="370" data-file-height="350" /></a></span> <a href="https://el.wiktionary.org/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%91%CF%83%CF%84%CF%81%CE%BF%CE%BD%CE%BF%CE%BC%CE%AF%CE%B1" class="extiw" title="wikt:Κατηγορία:Αστρονομία">Ορισμοί εννοιών γύρω από την Αστρονομία από το Βικιλεξικό</a></li></ul> <ul><li><span typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:Commons-logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="20" height="27" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <a href="https://commons.wikimedia.org/wiki/Category:Astronomy" class="extiw" title="commons:Category:Astronomy">Πολυμέσα για την αστρονομία στα Commons</a></li></ul> <ul><li><span typeof="mw:File"><a href="/wiki/%CE%91%CF%81%CF%87%CE%B5%CE%AF%CE%BF:Wikinews-logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/20px-Wikinews-logo.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/30px-Wikinews-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/40px-Wikinews-logo.svg.png 2x" data-file-width="759" data-file-height="415" /></a></span> <a href="https://el.wikinews.org/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%94%CE%B9%CE%AC%CF%83%CF%84%CE%B7%CE%BC%CE%B1" class="extiw" title="n:Κατηγορία:Διάστημα">Νέα για το διάστημα στα Βικινέα</a></li></ul> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> </div> </div> <div style="text-align:center"> <div class="pylh_2019_plaisio" style="background-color:#f9f9ff;padding:10px;"> <div class="pylh_2019_plaisio_header" style="margin:1px;font-weight: bold;font-family:Georgia; border-radius:3px 3px 0 0; background-color:#333366">Άλλες Πύλες <div class="plainlinks" style="float:right;font-size:80%;"><a class="external text" href="https://el.wikipedia.org/wiki/%CE%A0%CF%8D%CE%BB%CE%B5%CF%82"><span style="color:white;"><i>εμφ.</i></span></a> <a class="external text" href="https://el.wikipedia.org/w/index.php?title=%CE%A0%CF%8D%CE%BB%CE%B5%CF%82&action=edit"><span style="color:white;"><i>επεξ.</i></span></a> </div></div> <div align="center" class="hlist" style="clear:both; padding:0.25em 0 0.5em;"> <ul><li><b>Τι είναι οι <a href="/wiki/%CE%92%CE%B9%CE%BA%CE%B9%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CE%B9%CE%B1:%CE%A0%CF%8D%CE%BB%CE%B7" title="Βικιπαίδεια:Πύλη">πύλες</a>;</b></li> <li><b>Θεματικός <a href="/wiki/%CE%A0%CF%8D%CE%BB%CE%B7:%CE%98%CE%AD%CE%BC%CE%B1%CF%84%CE%B1" title="Πύλη:Θέματα">κατάλογος πυλών</a></b></li></ul> </div> <div class="noprint" style="text-align:right; margin:.3em -.2em -.2em .3em; padding:.3em -.2em -.2em .3em;"><b> </b></div> <div style="clear:both;"></div> </div> </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="">Ανακτήθηκε από "<a dir="ltr" href="https://el.wikipedia.org/w/index.php?title=Πύλη:Αστρονομία&oldid=9792506">https://el.wikipedia.org/w/index.php?title=Πύλη:Αστρονομία&oldid=9792506</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/%CE%95%CE%B9%CE%B4%CE%B9%CE%BA%CF%8C:%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B5%CF%82" title="Ειδικό:Κατηγορίες">Κατηγορία</a>: 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