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class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Galaxy collision</span> </div> </a> <ul id="toc-Galaxy_collision-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Gallery" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gallery"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Gallery</span> </div> </a> <ul id="toc-Gallery-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Galactic_cannibalism" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Galactic_cannibalism"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Galactic cannibalism</span> </div> </a> <ul id="toc-Galactic_cannibalism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Galaxy_harassment" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Galaxy_harassment"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Galaxy harassment</span> </div> </a> <ul id="toc-Galaxy_harassment-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notable_examples" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notable_examples"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Notable examples</span> </div> </a> <ul id="toc-Notable_examples-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Andromeda–Milky_Way_collision" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Andromeda–Milky_Way_collision"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Andromeda–Milky Way collision</span> </div> </a> <ul id="toc-Andromeda–Milky_Way_collision-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>External links</span> </div> </a> <ul id="toc-External_links-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="Contents" 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="Toggle the table of contents" > <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">Toggle the table of contents</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">Interacting galaxy</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="Go to an article in another language. Available in 37 languages" > <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-37" 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">37 languages</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/Interaktiewe_sterrestelsel" title="Interaktiewe sterrestelsel – Afrikaans" lang="af" hreflang="af" data-title="Interaktiewe sterrestelsel" 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%AA%D9%81%D8%A7%D8%B9%D9%84_%D9%85%D8%AC%D8%B1%D9%8A" title="تفاعل مجري – Arabic" lang="ar" hreflang="ar" data-title="تفاعل مجري" data-language-autonym="العربية" data-language-local-name="Arabic" 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%92%D0%B7%D0%B0%D0%B8%D0%BC%D0%BE%D0%B4%D0%B5%D0%B9%D1%81%D1%82%D0%B2%D0%B0%D1%89%D0%B8_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D0%B8" title="Взаимодействащи галактики – Bulgarian" lang="bg" hreflang="bg" data-title="Взаимодействащи галактики" data-language-autonym="Български" data-language-local-name="Bulgarian" 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/Interacci%C3%B3_de_gal%C3%A0xies" title="Interacció de galàxies – Catalan" lang="ca" hreflang="ca" data-title="Interacció de galàxies" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://de.wikipedia.org/wiki/Wechselwirkende_Galaxien" title="Wechselwirkende Galaxien – German" lang="de" hreflang="de" data-title="Wechselwirkende Galaxien" data-language-autonym="Deutsch" data-language-local-name="German" 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%CE%BB%CE%BB%CE%B7%CE%BB%CE%B5%CF%80%CE%B9%CE%B4%CF%81%CF%8E%CE%BD_%CE%B3%CE%B1%CE%BB%CE%B1%CE%BE%CE%AF%CE%B1%CF%82" title="Αλληλεπιδρών γαλαξίας – Greek" lang="el" hreflang="el" data-title="Αλληλεπιδρών γαλαξίας" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Interacci%C3%B3n_de_galaxias" title="Interacción de galaxias – Spanish" lang="es" hreflang="es" data-title="Interacción de galaxias" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Interagantaj_galaksioj" title="Interagantaj galaksioj – Esperanto" lang="eo" hreflang="eo" data-title="Interagantaj galaksioj" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%B1%D9%87%D9%85%E2%80%8C%DA%A9%D9%86%D8%B4_%DA%A9%D9%87%DA%A9%D8%B4%D8%A7%D9%86" title="برهم‌کنش کهکشان – Persian" lang="fa" hreflang="fa" data-title="برهم‌کنش کهکشان" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Galaxies_en_interaction" title="Galaxies en interaction – French" lang="fr" hreflang="fr" data-title="Galaxies en interaction" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%83%81%ED%98%B8%EC%9E%91%EC%9A%A9%EC%9D%80%ED%95%98" title="상호작용은하 – Korean" lang="ko" hreflang="ko" data-title="상호작용은하" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%82%E0%A4%A4%E0%A4%83%E0%A4%95%E0%A5%8D%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%88_%E0%A4%97%E0%A5%88%E0%A4%B2%E0%A5%87%E0%A4%95%E0%A5%8D%E0%A4%B8%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%81" title="अंतःक्रियाई गैलेक्सियाँ – Hindi" lang="hi" hreflang="hi" data-title="अंतःक्रियाई गैलेक्सियाँ" 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/Me%C4%91udjeluju%C4%87e_galaktike" title="Međudjelujuće galaktike – Croatian" lang="hr" hreflang="hr" data-title="Međudjelujuće galaktike" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Interaksi_galaksi" title="Interaksi galaksi – Indonesian" lang="id" hreflang="id" data-title="Interaksi galaksi" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" 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/Galassie_interagenti" title="Galassie interagenti – Italian" lang="it" hreflang="it" data-title="Galassie interagenti" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%92%E1%83%90%E1%83%9A%E1%83%90%E1%83%A5%E1%83%A2%E1%83%98%E1%83%99%E1%83%90%E1%83%97%E1%83%90_%E1%83%A3%E1%83%A0%E1%83%97%E1%83%98%E1%83%94%E1%83%A0%E1%83%97%E1%83%A5%E1%83%9B%E1%83%94%E1%83%93%E1%83%94%E1%83%91%E1%83%90" title="გალაქტიკათა ურთიერთქმედება – Georgian" lang="ka" hreflang="ka" data-title="გალაქტიკათა ურთიერთქმედება" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Mijiedarbojo%C5%A1%C4%81s_galaktikas" title="Mijiedarbojošās galaktikas – Latvian" lang="lv" hreflang="lv" data-title="Mijiedarbojošās galaktikas" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Interaktiv_Galaxien" title="Interaktiv Galaxien – Luxembourgish" lang="lb" hreflang="lb" data-title="Interaktiv Galaxien" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/K%C3%B6lcs%C3%B6nhat%C3%B3_galaxis" title="Kölcsönható galaxis – Hungarian" lang="hu" hreflang="hu" data-title="Kölcsönható galaxis" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%97%D0%B0%D0%B5%D0%BC%D0%BE%D0%B4%D0%B5%D0%BB%D1%83%D0%B2%D0%B0%D1%87%D0%BA%D0%B8_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%81%D0%B8%D0%B8" title="Заемоделувачки галаксии – Macedonian" lang="mk" hreflang="mk" data-title="Заемоделувачки галаксии" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Galaksi_berinteraksi" title="Galaksi berinteraksi – Malay" lang="ms" hreflang="ms" data-title="Galaksi berinteraksi" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" 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/Interagerend_sterrenstelsel" title="Interagerend sterrenstelsel – Dutch" lang="nl" hreflang="nl" data-title="Interagerend sterrenstelsel" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%9B%B8%E4%BA%92%E4%BD%9C%E7%94%A8%E9%8A%80%E6%B2%B3" title="相互作用銀河 – Japanese" lang="ja" hreflang="ja" data-title="相互作用銀河" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Vekselvirkende_galakse" title="Vekselvirkende galakse – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Vekselvirkende galakse" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Vekselverkande_galakse" title="Vekselverkande galakse – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Vekselverkande galakse" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Galaxia_en_interaccion" title="Galaxia en interaccion – Occitan" lang="oc" hreflang="oc" data-title="Galaxia en interaccion" data-language-autonym="Occitan" data-language-local-name="Occitan" 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/Zderzenie_galaktyk" title="Zderzenie galaktyk – Polish" lang="pl" hreflang="pl" data-title="Zderzenie galaktyk" data-language-autonym="Polski" data-language-local-name="Polish" 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/Colis%C3%A3o_de_gal%C3%A1xias" title="Colisão de galáxias – Portuguese" lang="pt" hreflang="pt" data-title="Colisão de galáxias" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Interac%C8%9Biune_de_galaxii" title="Interacțiune de galaxii – Romanian" lang="ro" hreflang="ro" data-title="Interacțiune de galaxii" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D0%B7%D0%B0%D0%B8%D0%BC%D0%BE%D0%B4%D0%B5%D0%B9%D1%81%D1%82%D0%B2%D1%83%D1%8E%D1%89%D0%B8%D0%B5_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D0%B8" title="Взаимодействующие галактики – Russian" lang="ru" hreflang="ru" data-title="Взаимодействующие галактики" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Interaguj%C3%BAca_galaxia" title="Interagujúca galaxia – Slovak" lang="sk" hreflang="sk" data-title="Interagujúca galaxia" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Galaksipari" title="Galaksipari – Finnish" lang="fi" hreflang="fi" data-title="Galaksipari" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Etkile%C5%9Fen_galaksi" title="Etkileşen galaksi – Turkish" lang="tr" hreflang="tr" data-title="Etkileşen galaksi" data-language-autonym="Türkçe" data-language-local-name="Turkish" 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%92%D0%B7%D0%B0%D1%94%D0%BC%D0%BE%D0%B4%D1%96%D1%8E%D1%87%D1%96_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D0%B8" title="Взаємодіючі галактики – Ukrainian" lang="uk" hreflang="uk" data-title="Взаємодіючі галактики" data-language-autonym="Українська" data-language-local-name="Ukrainian" 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.ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Interacting_galaxy" title="Special:EditPage/Interacting galaxy">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Interacting+galaxy%22">"Interacting galaxy"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Interacting+galaxy%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Interacting+galaxy%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Interacting+galaxy%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Interacting+galaxy%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Interacting+galaxy%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">May 2009</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-Too_many_photos plainlinks metadata ambox ambox-style" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span class="skin-invert" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Image_cancel.svg/40px-Image_cancel.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Image_cancel.svg/60px-Image_cancel.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Image_cancel.svg/80px-Image_cancel.svg.png 2x" data-file-width="32" data-file-height="32" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>contains too many pictures for its overall length</b>.<span class="hide-when-compact"> Relevant discussion may be found on the <a href="/wiki/Talk:Interacting_galaxy##" title="Talk:Interacting galaxy">talk page</a>. Please <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Interacting_galaxy&action=edit">improve this article</a> by removing <a href="/wiki/Wikipedia:GALLERY" class="mw-redirect" title="Wikipedia:GALLERY">indiscriminate collections of images</a> or adjusting images that are <a href="/wiki/MOS:SANDWICH" class="mw-redirect" title="MOS:SANDWICH">sandwiching text</a> in accordance with the <a href="/wiki/Wikipedia:Manual_of_Style/Images" title="Wikipedia:Manual of Style/Images">Manual of Style on use of images</a>.</span> <span class="date-container"><i>(<span class="date">November 2024</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure typeof="mw:File/Thumb"><a href="/wiki/File:NGC_3169_NGC_3166.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/NGC_3169_NGC_3166.jpg/250px-NGC_3169_NGC_3166.jpg" decoding="async" width="250" height="250" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/NGC_3169_NGC_3166.jpg/375px-NGC_3169_NGC_3166.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/05/NGC_3169_NGC_3166.jpg/500px-NGC_3169_NGC_3166.jpg 2x" data-file-width="5403" data-file-height="5403" /></a><figcaption><a href="/wiki/NGC_3169" title="NGC 3169">NGC 3169</a> (left) and <a href="/w/index.php?title=NGC_3166&action=edit&redlink=1" class="new" title="NGC 3166 (page does not exist)">NGC 3166</a> (right) display some curious features, showing that each is close enough to feel the distorting gravitational influence of the other. Image from the Wide Field Imager on the MPG/<a href="/wiki/ESO" class="mw-redirect" title="ESO">ESO</a> <a href="/wiki/MPG/ESO_telescope" title="MPG/ESO telescope">2.2-metre telescope</a> at the <a href="/wiki/La_Silla_Observatory" title="La Silla Observatory">La Silla Observatory</a>.</figcaption></figure> <p><b>Interacting galaxies</b> (<i><b>colliding galaxies</b></i>) are <a href="/wiki/Galaxy" title="Galaxy">galaxies</a> whose <a href="/wiki/Gravity" title="Gravity">gravitational fields</a> result in a disturbance of one another. An example of a minor interaction is a <a href="/wiki/Satellite_galaxy" title="Satellite galaxy">satellite galaxy</a> disturbing the primary galaxy's <a href="/wiki/Spiral_arm" title="Spiral arm">spiral arms</a>. An example of a major interaction is a galactic collision, which may lead to a <a href="/wiki/Galaxy_merger" title="Galaxy merger">galaxy merger</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Satellite_interaction">Satellite interaction</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=1" title="Edit section: Satellite interaction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A giant galaxy interacting with its <a href="/wiki/Satellite_galaxy" title="Satellite galaxy">satellites</a> is common. A satellite's gravity could attract one of the primary's <a href="/wiki/Spiral_arm" title="Spiral arm">spiral arms</a>. Alternatively, the secondary satellite can dive into the primary galaxy, as in the <a href="/wiki/Sagittarius_Dwarf_Spheroidal_Galaxy" title="Sagittarius Dwarf Spheroidal Galaxy">Sagittarius Dwarf Elliptical Galaxy</a> diving into the <a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a>. That can possibly trigger a small amount of <a href="/wiki/Star_formation" title="Star formation">star formation</a>. Such orphaned clusters of stars were sometimes referred to as "blue blobs" before they were recognized as stars.<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> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_1" poster="//upload.wikimedia.org/wikipedia/commons/thumb/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/220px--Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="124" data-durationhint="102" data-mwtitle="Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm" data-mwprovider="wikimediacommons" resource="/wiki/File:Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.1080p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="1080p.vp9.webm" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm" type="video/webm; codecs="vp9"" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm/Galaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&title=File%3AGalaxy_Collision_Animation-_James_Webb_Space_Telescope_Science.webm&lang=pt&trackformat=vtt&origin=%2A" kind="subtitles" type="text/vtt" srclang="pt" label="português ‪(pt)‬" data-dir="ltr" /></video></span><figcaption>Animation of Galaxy Collision</figcaption></figure> <div class="mw-heading mw-heading2"><h2 id="Galaxy_collision">Galaxy collision</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=2" title="Edit section: Galaxy collision"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg/220px-Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg/330px-Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg/440px-Merging_galaxies_in_the_distant_Universe_through_a_gravitational_magnifying_glass.jpg 2x" data-file-width="612" data-file-height="612" /></a><figcaption>Gravitationally lensed galactic merger H-ATLAS J142935.3-002836.<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></figcaption></figure> <p>Colliding galaxies are common during <a href="/wiki/Galaxy_formation_and_evolution" title="Galaxy formation and evolution">galaxy evolution</a>.<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> The extremely tenuous distribution of matter in galaxies means these are not collisions in the traditional sense of the word, but rather gravitational interactions. </p><p>Colliding may lead to <a href="/wiki/Galaxy_merger" title="Galaxy merger">merging</a> if two galaxies collide and do not have enough momentum to continue traveling after the collision. As with other <a href="/wiki/Galaxy_collision" class="mw-redirect" title="Galaxy collision">galaxy collisions</a>, the merging of two galaxies may create a <a href="/wiki/Starburst_region" title="Starburst region">starburst region</a> of new stars.<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> In that case, they fall back into each other and eventually merge into one galaxy after many passes through each other. If one of the colliding galaxies is much larger than the other, it will remain largely intact after the merger. The larger galaxy will look much the same, while the smaller galaxy will be stripped apart and become part of the larger galaxy. When galaxies pass through each other, unlike during mergers, they largely retain their material and shape after the pass. </p><p>Galactic collisions are now frequently simulated on computers, which use realistic physics principles, including the simulation of gravitational forces, gas dissipation phenomena, star formation, and feedback. <a href="/wiki/Dynamical_friction" title="Dynamical friction">Dynamical friction</a> slows the relative motion of galaxy pairs, which may possibly merge at some point, according to the initial relative energy of the orbits. A library of simulated galaxy collisions can be found at the Paris Observatory website GALMER.<sup id="cite_ref-galmer.obspm.fr_5-0" class="reference"><a href="#cite_note-galmer.obspm.fr-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Gallery">Gallery</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=3" title="Edit section: Gallery"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Galactic_Creatures_at_Play.jpg" class="mw-file-description" title="UGC 2369 taken by HST.[6]"><img alt="UGC 2369 taken by HST.[6]" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Galactic_Creatures_at_Play.jpg/120px-Galactic_Creatures_at_Play.jpg" decoding="async" width="120" height="81" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Galactic_Creatures_at_Play.jpg/180px-Galactic_Creatures_at_Play.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/39/Galactic_Creatures_at_Play.jpg/240px-Galactic_Creatures_at_Play.jpg 2x" data-file-width="3392" data-file-height="2291" /></a></span></div> <div class="gallerytext"><a href="/wiki/UGC_2369" title="UGC 2369">UGC 2369</a> taken by <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">HST</a>.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Close_encounter_IRAS_06076-2139.jpg" class="mw-file-description" title="Close encounter at IRAS 06076-2139.[7]"><img alt="Close encounter at IRAS 06076-2139.[7]" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Close_encounter_IRAS_06076-2139.jpg/120px-Close_encounter_IRAS_06076-2139.jpg" decoding="async" width="120" height="98" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Close_encounter_IRAS_06076-2139.jpg/180px-Close_encounter_IRAS_06076-2139.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Close_encounter_IRAS_06076-2139.jpg/240px-Close_encounter_IRAS_06076-2139.jpg 2x" data-file-width="3920" data-file-height="3211" /></a></span></div> <div class="gallerytext">Close encounter at <a href="/wiki/IRAS_06076-2139" title="IRAS 06076-2139">IRAS 06076-2139</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:NGC_4298_and_NGC_4302_-_Heic1709a.jpg" class="mw-file-description" title="Interacting galaxies NGC 4302 and NGC 4298 both located 55 million light-years away.[8]"><img alt="Interacting galaxies NGC 4302 and NGC 4298 both located 55 million light-years away.[8]" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/NGC_4298_and_NGC_4302_-_Heic1709a.jpg/112px-NGC_4298_and_NGC_4302_-_Heic1709a.jpg" decoding="async" width="112" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/NGC_4298_and_NGC_4302_-_Heic1709a.jpg/168px-NGC_4298_and_NGC_4302_-_Heic1709a.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/NGC_4298_and_NGC_4302_-_Heic1709a.jpg/224px-NGC_4298_and_NGC_4302_-_Heic1709a.jpg 2x" data-file-width="7345" data-file-height="7853" /></a></span></div> <div class="gallerytext">Interacting galaxies <a href="/wiki/NGC_4302" title="NGC 4302">NGC 4302</a> and <a href="/wiki/NGC_4298" title="NGC 4298">NGC 4298</a> both located 55 million light-years away.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:NGC_6052.jpg" class="mw-file-description" title="Galaxy NGC 6052 merging into a single structure.[9]"><img alt="Galaxy NGC 6052 merging into a single structure.[9]" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/NGC_6052.jpg/112px-NGC_6052.jpg" decoding="async" width="112" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/NGC_6052.jpg/168px-NGC_6052.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cf/NGC_6052.jpg/224px-NGC_6052.jpg 2x" data-file-width="622" data-file-height="666" /></a></span></div> <div class="gallerytext">Galaxy <a href="/wiki/NGC_6052" title="NGC 6052">NGC 6052</a> merging into a single structure.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Galactic_soup.jpg" class="mw-file-description" title="Galaxy pair Zw I 136.[10]"><img alt="Galaxy pair Zw I 136.[10]" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Galactic_soup.jpg/120px-Galactic_soup.jpg" decoding="async" width="120" height="94" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Galactic_soup.jpg/180px-Galactic_soup.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Galactic_soup.jpg/240px-Galactic_soup.jpg 2x" data-file-width="3454" data-file-height="2698" /></a></span></div> <div class="gallerytext">Galaxy pair Zw I 136.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:The_messy_result_of_a_galactic_collision.jpg" class="mw-file-description" title="ESO 576-69 is believed to be the nucleus of a former spiral galaxy.[11]"><img alt="ESO 576-69 is believed to be the nucleus of a former spiral galaxy.[11]" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/55/The_messy_result_of_a_galactic_collision.jpg/120px-The_messy_result_of_a_galactic_collision.jpg" decoding="async" width="120" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/55/The_messy_result_of_a_galactic_collision.jpg/180px-The_messy_result_of_a_galactic_collision.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/55/The_messy_result_of_a_galactic_collision.jpg/240px-The_messy_result_of_a_galactic_collision.jpg 2x" data-file-width="1001" data-file-height="916" /></a></span></div> <div class="gallerytext">ESO 576-69 is believed to be the nucleus of a former spiral galaxy.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Whirlpool_(M51).jpg" class="mw-file-description" title="The Whirlpool Galaxy with its satellite NGC 5195."><img alt="The Whirlpool Galaxy with its satellite NGC 5195." src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Whirlpool_%28M51%29.jpg/87px-Whirlpool_%28M51%29.jpg" decoding="async" width="87" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Whirlpool_%28M51%29.jpg/130px-Whirlpool_%28M51%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/81/Whirlpool_%28M51%29.jpg/174px-Whirlpool_%28M51%29.jpg 2x" data-file-width="326" data-file-height="450" /></a></span></div> <div class="gallerytext">The <a href="/wiki/Whirlpool_Galaxy" title="Whirlpool Galaxy">Whirlpool Galaxy</a> with its <a href="/wiki/Satellite_galaxy" title="Satellite galaxy">satellite</a> <a href="/wiki/Irregular_Galaxy_NGC_5195" class="mw-redirect" title="Irregular Galaxy NGC 5195">NGC 5195</a>.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:NGC4676.jpg" class="mw-file-description" title="The Mice Galaxies."><img alt="The Mice Galaxies." src="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/NGC4676.jpg/120px-NGC4676.jpg" decoding="async" width="120" height="55" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/NGC4676.jpg/180px-NGC4676.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/db/NGC4676.jpg/240px-NGC4676.jpg 2x" data-file-width="2843" data-file-height="1312" /></a></span></div> <div class="gallerytext">The <a href="/wiki/Mice_Galaxies" title="Mice Galaxies">Mice Galaxies</a>.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv/120px--Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="120" height="68" data-durationhint="99" data-mwtitle="Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f5/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="512" data-height="288" /><source src="//upload.wikimedia.org/wikipedia/commons/f/f5/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv" type="video/ogg; codecs="theora"" data-width="512" data-height="288" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f5/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f5/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv/Colliding_Galaxies_Create_Active_Galactic_Nuclei.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /></video></span></span></div> <div class="gallerytext">This simulation follows the collision of two spiral galaxies that harbour giant black holes.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Defying_cosmic_convention.jpg" class="mw-file-description" title="NGC 3447 comprises a couple of interacting galaxies.[12]"><img alt="NGC 3447 comprises a couple of interacting galaxies.[12]" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Defying_cosmic_convention.jpg/120px-Defying_cosmic_convention.jpg" decoding="async" width="120" height="103" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Defying_cosmic_convention.jpg/180px-Defying_cosmic_convention.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Defying_cosmic_convention.jpg/240px-Defying_cosmic_convention.jpg 2x" data-file-width="1280" data-file-height="1096" /></a></span></div> <div class="gallerytext"><a href="/wiki/NGC_3447" title="NGC 3447">NGC 3447</a> comprises a couple of interacting galaxies.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:NGC_1510_and_NGC_1512_in_UV_Light.jpg" class="mw-file-description" title="Barred spiral galaxy NGC 1512 in the process of a lengthy merger with NGC 1510, a dwarf elliptical galaxy."><img alt="Barred spiral galaxy NGC 1512 in the process of a lengthy merger with NGC 1510, a dwarf elliptical galaxy." src="//upload.wikimedia.org/wikipedia/commons/thumb/1/14/NGC_1510_and_NGC_1512_in_UV_Light.jpg/120px-NGC_1510_and_NGC_1512_in_UV_Light.jpg" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/14/NGC_1510_and_NGC_1512_in_UV_Light.jpg/180px-NGC_1510_and_NGC_1512_in_UV_Light.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/14/NGC_1510_and_NGC_1512_in_UV_Light.jpg/240px-NGC_1510_and_NGC_1512_in_UV_Light.jpg 2x" data-file-width="858" data-file-height="858" /></a></span></div> <div class="gallerytext"><a href="/wiki/Barred_spiral_galaxy" title="Barred spiral galaxy">Barred spiral galaxy</a> <a href="/wiki/NGC_1512" title="NGC 1512">NGC 1512</a> in the process of a lengthy merger with <a href="/wiki/NGC_1510" title="NGC 1510">NGC 1510</a>, a <a href="/wiki/Dwarf_galaxy" title="Dwarf galaxy">dwarf</a> <a href="/wiki/Elliptical_galaxy" title="Elliptical galaxy">elliptical galaxy</a>.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Hubble_Interacting_Galaxy_ESO_593-8_(2008-04-24).jpg" class="mw-file-description" title="ESO 593-8 is an impressive pair of interacting galaxies with a feather-like galaxy crossing a companion galaxy."><img alt="ESO 593-8 is an impressive pair of interacting galaxies with a feather-like galaxy crossing a companion galaxy." src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg/120px-Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg/180px-Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg/240px-Hubble_Interacting_Galaxy_ESO_593-8_%282008-04-24%29.jpg 2x" data-file-width="2712" data-file-height="2712" /></a></span></div> <div class="gallerytext"><a href="/wiki/ESO_593-8" title="ESO 593-8">ESO 593-8</a> is an impressive pair of interacting galaxies with a feather-like galaxy crossing a companion galaxy.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Antennae-RGB-2048-RECOMBINE.jpg" class="mw-file-description" title="Antennae Galaxies NGC 4038 & NGC 4039 are a pair of interacting galaxies in the constellation Corvus."><img alt="Antennae Galaxies NGC 4038 & NGC 4039 are a pair of interacting galaxies in the constellation Corvus." src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Antennae-RGB-2048-RECOMBINE.jpg/120px-Antennae-RGB-2048-RECOMBINE.jpg" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Antennae-RGB-2048-RECOMBINE.jpg/180px-Antennae-RGB-2048-RECOMBINE.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Antennae-RGB-2048-RECOMBINE.jpg/240px-Antennae-RGB-2048-RECOMBINE.jpg 2x" data-file-width="2048" data-file-height="2048" /></a></span></div> <div class="gallerytext"><a href="/wiki/Antennae_Galaxies" title="Antennae Galaxies">Antennae Galaxies</a> NGC 4038 & NGC 4039 are a pair of interacting galaxies in the constellation <a href="/wiki/Corvus_(constellation)" title="Corvus (constellation)">Corvus</a>.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_(2008-04-24).jpg" class="mw-file-description" title="2MASX J09133888-1019196, an interacting galaxy in the constellation of Hydra located 700 million light-years away. Both galaxies are beginning to merge together, with a separation gap of only 130,000 light-years.[13]"><img alt="2MASX J09133888-1019196, an interacting galaxy in the constellation of Hydra located 700 million light-years away. Both galaxies are beginning to merge together, with a separation gap of only 130,000 light-years.[13]" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg/120px-Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg/180px-Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg/240px-Hubble_Interacting_Galaxy_2MASX_J09133888-1019196_%282008-04-24%29.jpg 2x" data-file-width="2887" data-file-height="2887" /></a></span></div> <div class="gallerytext">2MASX J09133888-1019196, an interacting galaxy in the constellation of <a href="/wiki/Hydra_(constellation)" title="Hydra (constellation)">Hydra</a> located 700 million light-years away. Both galaxies are beginning to merge together, with a separation gap of only 130,000 light-years.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Hubble_Interacting_Galaxy_ESO_77-14_(2008-04-24).jpg" class="mw-file-description" title="Interacting galaxy pair, ESO 77-14 located in the constellation Indus. These galaxies are currently in a gravitational tug of war with each other, distorting their appendences.[14]"><img alt="Interacting galaxy pair, ESO 77-14 located in the constellation Indus. These galaxies are currently in a gravitational tug of war with each other, distorting their appendences.[14]" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg/120px-Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg/180px-Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg/240px-Hubble_Interacting_Galaxy_ESO_77-14_%282008-04-24%29.jpg 2x" data-file-width="3034" data-file-height="3034" /></a></span></div> <div class="gallerytext">Interacting galaxy pair, ESO 77-14 located in the constellation <a href="/wiki/Indus_(constellation)" title="Indus (constellation)">Indus</a>. These galaxies are currently in a gravitational tug of war with each other, distorting their appendences.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Galactic_cannibalism">Galactic cannibalism</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=4" title="Edit section: Galactic cannibalism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:The_last_waltz.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/The_last_waltz.jpg/220px-The_last_waltz.jpg" decoding="async" width="220" height="209" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/The_last_waltz.jpg/330px-The_last_waltz.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/77/The_last_waltz.jpg/440px-The_last_waltz.jpg 2x" data-file-width="1280" data-file-height="1215" /></a><figcaption><a href="/wiki/2MASX_J16270254%2B4328340" title="2MASX J16270254+4328340">2MASX J16270254+4328340</a> galaxy has merged with another galaxy leaving a fine mist, made of millions of stars, spewing from it in long trails.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p><b>Galactic cannibalism</b> is a common phenomenon.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> It refers to the process in which a large <a href="/wiki/Galaxy" title="Galaxy">galaxy</a>, through <a href="/wiki/Galactic_tide" title="Galactic tide">tidal</a> gravitational interactions with a companion, merges with that companion. The most common result of the gravitational merger between two or more galaxies is a larger <a href="/wiki/Irregular_galaxy" title="Irregular galaxy">irregular galaxy</a>, but <a href="/wiki/Elliptical_galaxy" title="Elliptical galaxy">elliptical galaxies</a> may also result. </p><p>It has been suggested that galactic cannibalism is currently occurring between the <a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a> and the <a href="/wiki/Magellanic_Clouds" title="Magellanic Clouds">Large and Small Magellanic Clouds</a>. Streams of gravitationally-attracted <a href="/wiki/Hydrogen" title="Hydrogen">hydrogen</a> arcing from these dwarf galaxies to the Milky Way is taken as evidence for the theory. </p> <div class="mw-heading mw-heading2"><h2 id="Galaxy_harassment">Galaxy harassment</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=5" title="Edit section: Galaxy harassment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Galaxy harassment is a type of interaction between a low-luminosity galaxy and a brighter one that takes place within rich <a href="/wiki/Galaxy_cluster" title="Galaxy cluster">galaxy clusters</a>, such as <a href="/wiki/Virgo_Cluster" title="Virgo Cluster">Virgo</a> and <a href="/wiki/Coma_Cluster" title="Coma Cluster">Coma</a>, where galaxies are moving at high <a href="/wiki/Relative_speed" class="mw-redirect" title="Relative speed">relative speeds</a> and suffering frequent encounters with other systems of the cluster due to the high galactic density. </p><p>According to <a href="/wiki/Computer_simulation" title="Computer simulation">computer simulations</a>, the interactions convert the affected galaxy disks into disturbed <a href="/wiki/Barred_spiral_galaxy" title="Barred spiral galaxy">barred spiral galaxies</a> and produces <a href="/wiki/Starburst_galaxy" title="Starburst galaxy">starbursts</a> followed by, if more encounters occur, loss of <a href="/wiki/Angular_momentum" title="Angular momentum">angular momentum</a> and heating of their gas. The result would be the conversion of (late type) low-luminosity spiral galaxies into <a href="/wiki/Dwarf_spheroidal_galaxy" title="Dwarf spheroidal galaxy">dwarf spheroidals</a> and <a href="/wiki/Dwarf_elliptical_galaxy" title="Dwarf elliptical galaxy">dwarf ellipticals</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p><p>Evidence for the hypothesis had been claimed by studying early-type dwarf galaxies in the Virgo Cluster and finding structures, such as disks and spiral arms, which suggest they are former <a href="/wiki/Disc_galaxy" title="Disc galaxy">disc systems</a> transformed by the above-mentioned interactions.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> The existence of similar structures in isolated early-type dwarf galaxies, such as <a href="/wiki/LEDA_2108986" title="LEDA 2108986">LEDA 2108986</a>, has undermined this hypothesis.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Notable_examples">Notable examples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=6" title="Edit section: Notable examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Galaxies_Gone_Wild!.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Galaxies_Gone_Wild%21.jpg/250px-Galaxies_Gone_Wild%21.jpg" decoding="async" width="250" height="188" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Galaxies_Gone_Wild%21.jpg/375px-Galaxies_Gone_Wild%21.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Galaxies_Gone_Wild%21.jpg/500px-Galaxies_Gone_Wild%21.jpg 2x" data-file-width="6000" data-file-height="4500" /></a><figcaption>Montage of some well known interacting galaxies</figcaption></figure> <table class="wikitable sortable"> <tbody><tr> <th>Name </th> <th><a href="/wiki/Galaxy_morphological_classification" title="Galaxy morphological classification">Type</a> </th> <th>Distance<br />(million <a href="/wiki/Light-years" class="mw-redirect" title="Light-years">ly</a>) </th> <th><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Magnitude</a> </th> <th>Notes </th></tr> <tr> <td><a href="/wiki/Milky_Way_Galaxy" class="mw-redirect" title="Milky Way Galaxy">Milky Way Galaxy</a>, <a href="/wiki/Large_Magellanic_Cloud" title="Large Magellanic Cloud">LMC</a> and <a href="/wiki/Small_Magellanic_Cloud" title="Small Magellanic Cloud">SMC</a> </td> <td>SBc/SB(s)m/SB(s)m pec </td> <td style="text-align:right;">0 </td> <td style="text-align:right;"> </td> <td>Satellites interacting with their primary </td></tr> <tr> <td><a href="/wiki/Whirlpool_Galaxy" title="Whirlpool Galaxy">Whirlpool Galaxy</a> (M51) </td> <td>SAc (SB0-a) </td> <td style="text-align:right;">37 </td> <td style="text-align:right;">+8.4 </td> <td>Satellite interacting with its primary </td></tr> <tr> <td><a href="/wiki/NGC_1097" title="NGC 1097">NGC 1097</a> </td> <td>SB(s)bc (E6) </td> <td style="text-align:right;">45 </td> <td style="text-align:right;">+9.5 </td> <td>Satellite interacting with its primary </td></tr> <tr> <td><a href="/wiki/NGC_4567_and_NGC_4568" title="NGC 4567 and NGC 4568">Butterfly Galaxies NGC 4567/8</a> </td> <td>SA(rs)bc / SA(rs)bc </td> <td style="text-align:right;">60 </td> <td style="text-align:right;">+10.9 </td> <td>Early phase of interaction </td></tr> <tr> <td><a href="/wiki/NGC_2207_and_IC_2163" title="NGC 2207 and IC 2163">NGC 2207 and IC 2163</a> </td> <td>SAc/SAbc </td> <td style="text-align:right;">114 </td> <td style="text-align:right;">+11 </td> <td>Galaxies going through the <b>first phase</b> in galactic collision </td></tr> <tr> <td><a href="/wiki/Mice_Galaxies" title="Mice Galaxies">Mice Galaxies</a> (NGC 4676A and NGC 4676B) </td> <td>S0/SB(s)ab </td> <td style="text-align:right;">300 </td> <td style="text-align:right;">+13.5 </td> <td>Galaxies going through the <b>second phase</b> in galactic collision </td></tr> <tr> <td><a href="/wiki/Antennae_Galaxies" title="Antennae Galaxies">Antennae Galaxies</a> (NGC 4038/9) </td> <td>SAc/SBm </td> <td style="text-align:right;">45 </td> <td style="text-align:right;">+10.3 </td> <td>Galaxies going through the <b>third phase</b> in galactic collision </td></tr> <tr> <td><a href="/wiki/NGC_520" title="NGC 520">NGC 520</a> </td> <td>S </td> <td style="text-align:right;">100 </td> <td style="text-align:right;">+11.3 </td> <td>Galaxies going through the <b>third phase</b> in galactic collision </td></tr> <tr> <td><a href="/wiki/NGC_2936" title="NGC 2936">NGC 2936</a> </td> <td>Irr </td> <td style="text-align:right;">352 </td> <td style="text-align:right;">+12.9 </td> <td>? </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Andromeda–Milky_Way_collision"><span id="Andromeda.E2.80.93Milky_Way_collision"></span>Andromeda–Milky Way collision</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=7" title="Edit section: Andromeda–Milky Way collision"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Andromeda%E2%80%93Milky_Way_collision" title="Andromeda–Milky Way collision">Andromeda–Milky Way collision</a></div> <p>Astronomers have estimated the <a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a> Galaxy will collide with the <a href="/wiki/Andromeda_Galaxy" title="Andromeda Galaxy">Andromeda Galaxy</a> in about 4.5 billion years. Some think the two <a href="/wiki/Spiral_galaxy" title="Spiral galaxy">spiral galaxies</a> will eventually merge to become an <a href="/wiki/Elliptical_galaxy" title="Elliptical galaxy">elliptical galaxy</a><sup id="cite_ref-muir_21-0" class="reference"><a href="#cite_note-muir-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> or perhaps a large <a href="/wiki/Disc_galaxy" title="Disc galaxy">disc galaxy</a>.<sup id="cite_ref-Ueda2014_23-0" class="reference"><a href="#cite_note-Ueda2014-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=8" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/NGC_7318" title="NGC 7318">NGC 7318</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=9" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width reflist-columns-2"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://hubblesite.org/news_release/news/2008-02">"HubbleSite: News - 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(2017-05-01). <a rel="nofollow" class="external text" href="https://doi.org/10.3847%2F1538-4357%2Faa6e56">"Implications for the Origin of Early-type Dwarf Galaxies: A Detailed Look at the Isolated Rotating Early-type Dwarf Galaxy LEDA 2108986 (CG 611), Ramifications for the Fundamental Plane's {S}_{K}^{2} Kinematic Scaling, and the Spin-Ellipticity Diagram"</a>. <i>The Astrophysical Journal</i>. <b>840</b> (2): 68. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/1705.03587">1705.03587</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2017ApJ...840...68G">2017ApJ...840...68G</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.3847%2F1538-4357%2Faa6e56">10.3847/1538-4357/aa6e56</a></span>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0004-637X">0004-637X</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal&rft.atitle=Implications+for+the+Origin+of+Early-type+Dwarf+Galaxies%3A+A+Detailed+Look+at+the+Isolated+Rotating+Early-type+Dwarf+Galaxy+LEDA+2108986+%28CG+611%29%2C+Ramifications+for+the+Fundamental+Plane%27s+%7BS%7D_%7BK%7D%5E%7B2%7D+Kinematic+Scaling%2C+and+the+Spin-Ellipticity+Diagram&rft.volume=840&rft.issue=2&rft.pages=68&rft.date=2017-05-01&rft_id=info%3Aarxiv%2F1705.03587&rft.issn=0004-637X&rft_id=info%3Adoi%2F10.3847%2F1538-4357%2Faa6e56&rft_id=info%3Abibcode%2F2017ApJ...840...68G&rft.aulast=Graham&rft.aufirst=Alister+W.&rft.au=Janz%2C+Joachim&rft.au=Penny%2C+Samantha+J.&rft.au=Chilingarian%2C+Igor+V.&rft.au=Ciambur%2C+Bogdan+C.&rft.au=Forbes%2C+Duncan+A.&rft.au=Davies%2C+Roger+L.&rft_id=https%3A%2F%2Fdoi.org%2F10.3847%252F1538-4357%252Faa6e56&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInteracting+galaxy" class="Z3988"></span></span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJanzPennyGrahamForbes2017" class="citation journal cs1">Janz, Joachim; Penny, Samantha J.; Graham, Alister W.; Forbes, Duncan A.; Davies, Roger L. (2017-07-01). <a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fmnras%2Fstx634">"Implications for the origin of early-type dwarf galaxies - the discovery of rotation in isolated, low-mass early-type galaxies"</a>. <i>Monthly Notices of the Royal Astronomical Society</i>. <b>468</b> (3): 2850–2864. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/1703.04975">1703.04975</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2017MNRAS.468.2850J">2017MNRAS.468.2850J</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fmnras%2Fstx634">10.1093/mnras/stx634</a></span>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0035-8711">0035-8711</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Monthly+Notices+of+the+Royal+Astronomical+Society&rft.atitle=Implications+for+the+origin+of+early-type+dwarf+galaxies+-+the+discovery+of+rotation+in+isolated%2C+low-mass+early-type+galaxies&rft.volume=468&rft.issue=3&rft.pages=2850-2864&rft.date=2017-07-01&rft_id=info%3Aarxiv%2F1703.04975&rft.issn=0035-8711&rft_id=info%3Adoi%2F10.1093%2Fmnras%2Fstx634&rft_id=info%3Abibcode%2F2017MNRAS.468.2850J&rft.aulast=Janz&rft.aufirst=Joachim&rft.au=Penny%2C+Samantha+J.&rft.au=Graham%2C+Alister+W.&rft.au=Forbes%2C+Duncan+A.&rft.au=Davies%2C+Roger+L.&rft_id=https%3A%2F%2Fdoi.org%2F10.1093%252Fmnras%252Fstx634&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInteracting+galaxy" class="Z3988"></span></span> </li> <li id="cite_note-muir-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-muir_21-0">^</a></b></span> <span class="reference-text">whose gravitational interactions will fling various celestial bodies outward, evicting them from the resulting elliptical galaxy.<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHazel_Muir2007" class="citation web cs1">Hazel Muir (2007-05-14). <a rel="nofollow" class="external text" href="https://www.newscientist.com/article/dn11852-galactic-merger-to-evict-sun-and-earth.html#.VDVdDvl_uVB">"Galactic merger to 'evict' Sun and Earth"</a>. <a href="/wiki/New_Scientist" title="New Scientist">New Scientist</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140420022909/http://www.newscientist.com/article/dn11852-galactic-merger-to-evict-sun-and-earth.html#.VDVeCfl_uVA">Archived</a> from the original on 20 April 2014<span class="reference-accessdate">. Retrieved <span class="nowrap">2014-10-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Galactic+merger+to+%27evict%27+Sun+and+Earth&rft.pub=New+Scientist&rft.date=2007-05-14&rft.au=Hazel+Muir&rft_id=https%3A%2F%2Fwww.newscientist.com%2Farticle%2Fdn11852-galactic-merger-to-evict-sun-and-earth.html%23.VDVdDvl_uVB&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInteracting+galaxy" class="Z3988"></span></span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text"><a href="/wiki/Astronomy_(magazine)" title="Astronomy (magazine)">Astronomy</a>, June 2008, page 28, by <a href="/wiki/Abraham_Loeb" class="mw-redirect" title="Abraham Loeb">Abraham Loeb</a> and <a href="/w/index.php?title=T.J.Cox&action=edit&redlink=1" class="new" title="T.J.Cox (page does not exist)">T.J.Cox</a></span> </li> <li id="cite_note-Ueda2014-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-Ueda2014_23-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJunko_Ueda2014" class="citation journal cs1">Junko Ueda; et al. (2014). "Cold molecular gas in merger remnants. I. Formation of molecular gas disks". <i>The Astrophysical Journal Supplement Series</i>. <b>214</b> (1): 1. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/1407.6873">1407.6873</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2014ApJS..214....1U">2014ApJS..214....1U</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F0067-0049%2F214%2F1%2F1">10.1088/0067-0049/214/1/1</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:716993">716993</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Astrophysical+Journal+Supplement+Series&rft.atitle=Cold+molecular+gas+in+merger+remnants.+I.+Formation+of+molecular+gas+disks&rft.volume=214&rft.issue=1&rft.pages=1&rft.date=2014&rft_id=info%3Aarxiv%2F1407.6873&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A716993%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1088%2F0067-0049%2F214%2F1%2F1&rft_id=info%3Abibcode%2F2014ApJS..214....1U&rft.au=Junko+Ueda&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInteracting+galaxy" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Interacting_galaxy&action=edit&section=10" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style 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title="Galaxy morphological classification">Morphology</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Disc_galaxy" title="Disc galaxy">Disc</a></li> <li><a href="/wiki/Lenticular_galaxy" title="Lenticular galaxy">Lenticular</a> <ul><li><a href="/wiki/Barred_lenticular_galaxy" class="mw-redirect" title="Barred lenticular galaxy">barred</a></li> <li><a href="/wiki/Unbarred_lenticular_galaxy" class="mw-redirect" title="Unbarred lenticular galaxy">unbarred</a></li></ul></li> <li><a href="/wiki/Spiral_galaxy" title="Spiral galaxy">Spiral</a> <ul><li><a href="/wiki/Anemic_galaxy" title="Anemic galaxy">anemic</a></li> <li><a href="/wiki/Barred_spiral_galaxy" title="Barred spiral galaxy">barred</a></li> <li><a href="/wiki/Flocculent_spiral_galaxy" title="Flocculent spiral galaxy">flocculent</a></li> <li><a href="/wiki/Grand_design_spiral_galaxy" title="Grand design spiral galaxy">grand design</a></li> <li><a href="/wiki/Intermediate_spiral_galaxy" title="Intermediate spiral galaxy">intermediate</a></li> <li><a href="/wiki/Magellanic_spiral" title="Magellanic spiral">Magellanic</a></li> <li><a href="/wiki/Unbarred_spiral_galaxy" title="Unbarred spiral galaxy">unbarred</a></li></ul></li> <li><a href="/wiki/Dwarf_galaxy" title="Dwarf galaxy">Dwarf galaxy</a> <ul><li><a href="/wiki/Dwarf_elliptical_galaxy" title="Dwarf elliptical galaxy">elliptical</a></li> <li><a href="/wiki/Dwarf_galaxy#Common_dwarf_galaxy_types" title="Dwarf galaxy">irregular</a></li> <li><a href="/wiki/Dwarf_spheroidal_galaxy" title="Dwarf spheroidal galaxy">spheroidal</a></li> <li><a href="/wiki/Dwarf_spiral_galaxy" title="Dwarf spiral galaxy">spiral</a></li></ul></li> <li><a href="/wiki/Elliptical_galaxy" title="Elliptical galaxy">Elliptical galaxy</a> <ul><li><a href="/wiki/Type-cD_galaxy" title="Type-cD galaxy">cD</a></li></ul></li> <li><a href="/wiki/Irregular_galaxy" title="Irregular galaxy">Irregular</a> <ul><li><a href="/wiki/Barred_irregular_galaxy" title="Barred irregular galaxy">barred</a></li></ul></li> <li><a href="/wiki/Peculiar_galaxy" title="Peculiar galaxy">Peculiar</a></li> <li><a href="/wiki/Ring_galaxy" title="Ring galaxy">Ring</a> <ul><li><a href="/wiki/Polar-ring_galaxy" title="Polar-ring galaxy">Polar</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%">Structure</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Active_galactic_nucleus" title="Active galactic nucleus">Active galactic nucleus</a></li> <li><a href="/wiki/Barred_spiral_galaxy" title="Barred spiral galaxy">Bar</a></li> <li><a href="/wiki/Galactic_bulge" title="Galactic bulge">Bulge</a></li> <li><a href="/wiki/Central_massive_object" title="Central massive object">Central massive object</a> <ul><li><a href="/wiki/Galactic_Center" title="Galactic Center">Galactic Center</a></li></ul></li> <li><a href="/wiki/Dark_matter_halo" title="Dark matter halo">Dark matter halo</a></li> <li><a href="/wiki/Galactic_disc" title="Galactic disc">Disc</a> <ul><li><a href="/wiki/Disc_galaxy" title="Disc galaxy">Disc galaxy</a></li></ul></li> <li><a href="/wiki/Galactic_halo" title="Galactic halo">Halo</a> <ul><li><a href="/wiki/Galactic_corona" title="Galactic corona">corona</a></li></ul></li> <li><a href="/wiki/Galactic_plane" title="Galactic plane">Galactic plane</a></li> <li><a href="/wiki/Galactic_ridge" title="Galactic ridge">Galactic ridge</a></li> <li><a href="/wiki/Interstellar_medium" title="Interstellar medium">Interstellar medium</a></li> <li><a href="/wiki/Protogalaxy" title="Protogalaxy">Protogalaxy</a></li> <li><a href="/wiki/Galaxy_filament" title="Galaxy filament">Galaxy filament</a></li> <li><a href="/wiki/Spiral_galaxy#Spiral_arms" title="Spiral galaxy">Spiral arm</a></li> <li><a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">Supermassive black hole</a> <ul><li><a href="/wiki/Ultramassive_black_hole" class="mw-redirect" title="Ultramassive black hole">Ultramassive</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Active_galactic_nucleus" title="Active galactic nucleus">Active nuclei</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blazar" title="Blazar">Blazar</a></li> <li><a href="/wiki/Low-ionization_nuclear_emission-line_region" title="Low-ionization nuclear emission-line region">LINER</a></li> <li><a href="/wiki/Markarian_galaxies" title="Markarian galaxies">Markarian</a></li> <li><a href="/wiki/Quasar" title="Quasar">Quasar</a></li> <li><a href="/wiki/BL_Lacertae_object" title="BL Lacertae object">BL Lacertae object</a></li> <li><a href="/wiki/Radio_galaxy" title="Radio galaxy">Radio</a> <ul><li><a href="/wiki/X-shaped_radio_galaxy" title="X-shaped radio galaxy">X-shaped</a></li> <li><a href="/wiki/DRAGN" class="mw-redirect" title="DRAGN">DRAGN</a></li></ul></li> <li><a href="/wiki/Astrophysical_jet#Relativistic_jet" title="Astrophysical jet">Relativistic jet</a></li> <li><a href="/wiki/Seyfert_galaxy" title="Seyfert galaxy">Seyfert</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%">Energetic galaxies</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lyman-alpha_emitter" title="Lyman-alpha emitter">Lyman-alpha emitter</a></li> <li><a href="/wiki/Lyman-break_galaxy" title="Lyman-break galaxy">Lyman-break</a></li> <li><a href="/wiki/Luminous_infrared_galaxy" title="Luminous infrared galaxy">Luminous infrared</a> <ul><li><a href="/wiki/ULIRG" class="mw-redirect" title="ULIRG">ULIRG</a></li> <li><a href="/wiki/HLIRG" class="mw-redirect" title="HLIRG">HLIRG</a></li> <li><a href="/wiki/ELIRG" class="mw-redirect" title="ELIRG">ELIRG</a></li></ul></li> <li><a href="/wiki/Starburst_galaxy" title="Starburst galaxy">Starburst</a> <ul><li><a href="/wiki/Dwarf_galaxy#Blue_compact_dwarf_galaxies" title="Dwarf galaxy">blue compact dwarf</a></li> <li><a href="/wiki/Pea_galaxy" title="Pea galaxy">pea</a></li> <li><a href="/wiki/Faint_blue_galaxy" title="Faint blue galaxy">faint blue</a></li> <li><a href="/wiki/Luminous_infrared_galaxy" title="Luminous infrared galaxy">Luminous infrared galaxy</a></li></ul></li> <li><a href="/wiki/Hot,_dust-obscured_galaxy" title="Hot, dust-obscured galaxy">Hot dust-obscured</a></li> <li><a href="/wiki/Green_bean_galaxy" title="Green bean galaxy">Green bean galaxy</a></li> <li><a href="/wiki/Hanny%27s_Voorwerp" title="Hanny's Voorwerp">Hanny's Voorwerp</a></li> <li><a href="/wiki/Wolf-Rayet_galaxy" class="mw-redirect" title="Wolf-Rayet galaxy">Wolf-Rayet galaxy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%">Low activity</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Low_surface_brightness_galaxy" title="Low surface brightness galaxy">Low surface brightness</a></li> <li><a href="/wiki/Ultra_diffuse_galaxy" title="Ultra diffuse galaxy">Ultra diffuse</a></li> <li><a href="/wiki/Dark_galaxy" title="Dark galaxy">Dark galaxy</a></li> <li><a href="/wiki/Red_nugget" title="Red nugget">Red nugget</a></li> <li><a href="/wiki/Blue_Nugget" title="Blue Nugget">Blue Nugget</a></li> <li><a href="/wiki/Dead_disk" title="Dead disk">Dead disk</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%">Interaction</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Field_galaxy" title="Field galaxy">Field</a></li> <li><a href="/wiki/Galactic_tide" title="Galactic tide">Galactic tide</a></li> <li><a href="/wiki/Galaxy_groups_and_clusters" title="Galaxy groups and clusters">Groups and clusters</a> <ul><li><a href="/wiki/Galaxy_group" title="Galaxy group">group</a></li> <li><a href="/wiki/Galaxy_cluster" title="Galaxy cluster">cluster</a></li> <li><a href="/wiki/Brightest_cluster_galaxy" title="Brightest cluster galaxy">Brightest cluster galaxy</a></li> <li><a href="/wiki/Fossil_galaxy_group" class="mw-redirect" title="Fossil galaxy group">fossil group</a></li></ul></li> <li><a class="mw-selflink selflink">Interacting</a> <ul><li><a href="/wiki/Galaxy_merger" title="Galaxy merger">merger</a></li> <li><a href="/wiki/Galaxy_collision" class="mw-redirect" title="Galaxy collision">collision</a></li> <li><a href="/wiki/Galactic_cannibalism" class="mw-redirect" title="Galactic cannibalism">cannibalism</a></li></ul></li> <li><a href="/wiki/Jellyfish_galaxy" title="Jellyfish galaxy">Jellyfish</a></li> <li><a href="/wiki/Satellite_galaxy" title="Satellite galaxy">Satellite</a></li> <li><a href="/wiki/Stellar_kinematics#Stellar_streams" title="Stellar kinematics">Stellar stream</a></li> <li><a href="/wiki/Supercluster" title="Supercluster">Superclusters</a></li> <li><a href="/wiki/Galaxy_filament" title="Galaxy filament">Walls</a></li> <li><a href="/wiki/Void_(astronomy)" title="Void (astronomy)">Voids and supervoids</a> <ul><li><a href="/wiki/Void_galaxy" title="Void galaxy">void galaxy</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Lists_of_galaxies" title="Lists of galaxies">Lists</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_galaxies" title="List of galaxies">Galaxies</a> <ul><li><a href="/wiki/List_of_astronomical_objects_named_after_people#Galaxies" title="List of astronomical objects named after people">Galaxies named after people</a></li> <li><a href="/wiki/List_of_largest_galaxies" title="List of largest galaxies">Largest</a></li> <li><a href="/wiki/List_of_nearest_galaxies" title="List of nearest galaxies">Nearest</a></li> <li><a href="/wiki/List_of_polar-ring_galaxies" title="List of polar-ring galaxies">Polar-ring</a></li> <li><a href="/wiki/List_of_ring_galaxies" title="List of ring galaxies">Ring</a></li> <li><a href="/wiki/List_of_spiral_galaxies" title="List of spiral galaxies">Spiral</a></li></ul></li> <li><a href="/wiki/List_of_galaxy_groups_and_clusters" title="List of galaxy groups and clusters">Groups and clusters</a></li> <li><a href="/wiki/Large_quasar_group#List_of_LQGs" title="Large quasar group">Large quasar groups</a></li> <li><a href="/wiki/List_of_quasars" title="List of quasars">Quasars</a></li> <li><a href="/wiki/List_of_the_most_distant_astronomical_objects" title="List of the most distant astronomical objects">List of the most distant astronomical objects</a></li> <li><a href="/wiki/Starburst_galaxies" class="mw-redirect" title="Starburst galaxies">Starburst galaxies</a></li> <li><a href="/wiki/Supercluster#List_of_superclusters" title="Supercluster">Superclusters</a></li> <li><a href="/wiki/List_of_voids" title="List of voids">Voids</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Extragalactic_astronomy" title="Extragalactic astronomy">Extragalactic astronomy</a></li> <li><a href="/wiki/Galactic_astronomy" title="Galactic astronomy">Galactic astronomy</a></li> <li><a href="/wiki/Galactic_coordinate_system" title="Galactic coordinate system">Galactic coordinate system</a></li> <li><a href="/wiki/Galactic_habitable_zone" title="Galactic habitable zone">Galactic habitable zone</a></li> <li><a href="/wiki/Galactic_magnetic_fields" class="mw-redirect" title="Galactic magnetic fields">Galactic magnetic fields</a></li> <li><a href="/wiki/Galactic_orientation" title="Galactic orientation">Galactic orientation</a></li> <li><a href="/wiki/Galactic_quadrant" title="Galactic quadrant">Galactic quadrant</a></li> <li><a href="/wiki/Galaxy_color%E2%80%93magnitude_diagram" title="Galaxy color–magnitude diagram">Galaxy color–magnitude diagram</a></li> <li><a href="/wiki/Galaxy_formation_and_evolution" title="Galaxy formation and evolution">Galaxy formation and evolution</a></li> <li><a href="/wiki/Galaxy_rotation_curve" title="Galaxy rotation curve">Galaxy rotation curve</a></li> <li><a href="/wiki/Gravitational_lens" title="Gravitational lens">Gravitational lens</a></li> <li><a href="/wiki/Gravitational_microlensing" title="Gravitational microlensing">Gravitational microlensing</a></li> <li><a href="/wiki/Illustris_project" title="Illustris project">Illustris project</a></li> <li><a href="/wiki/Intergalactic_dust" title="Intergalactic dust">Intergalactic dust</a></li> <li><a href="/wiki/Intergalactic_star" title="Intergalactic star">Intergalactic stars</a></li> <li><a href="/wiki/Intergalactic_travel" title="Intergalactic travel">Intergalactic travel</a></li> <li><a href="/wiki/Metallicity#Population_IIIstars" title="Metallicity">Population III stars</a></li> <li><a href="/wiki/Galaxy_X_(galaxy)" title="Galaxy X (galaxy)">Galaxy X (galaxy)</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="text-align: center;"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" 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