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Available in 20 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-20" 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">20 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/Leo_I-dwergsterrestelsel" title="Leo I-dwergsterrestelsel – Afrikaans" lang="af" hreflang="af" data-title="Leo I-dwergsterrestelsel" 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/%D9%82%D8%B2%D9%85%D8%A9_%D8%A7%D9%84%D8%A3%D8%B3%D8%AF_%D8%A7%D9%84%D8%A3%D9%88%D9%84%D9%89" title="قزمة الأسد الأولى – Arabic" lang="ar" hreflang="ar" data-title="قزمة الأسد الأولى" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9B%D0%B5%D1%9E_I_(%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D1%8B%D0%BA%D0%B0)" title="Леў I (галактыка) – Belarusian" lang="be" hreflang="be" data-title="Леў I (галактыка)" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Lle%C3%B3_I_(gal%C3%A0xia)" title="Lleó I (galàxia) – Catalan" lang="ca" hreflang="ca" data-title="Lleó I (galàxia)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Leo-I-Zwerggalaxie" title="Leo-I-Zwerggalaxie – German" lang="de" hreflang="de" data-title="Leo-I-Zwerggalaxie" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Leo_I" title="Leo I – Spanish" lang="es" hreflang="es" data-title="Leo I" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Galaxie_du_Lion_I" title="Galaxie du Lion I – French" lang="fr" hreflang="fr" data-title="Galaxie du Lion I" 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%82%AC%EC%9E%90%EC%9E%90%EB%A6%AC_I_%EC%99%9C%EC%86%8C%EC%9D%80%ED%95%98" title="사자자리 I 왜소은하 – Korean" lang="ko" hreflang="ko" data-title="사자자리 I 왜소은하" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Galassia_Leo_I" title="Galassia Leo I – Italian" lang="it" hreflang="it" data-title="Galassia Leo I" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%94%D7%92%D7%9C%D7%A7%D7%A1%D7%99%D7%94_%D7%94%D7%A0%D7%A0%D7%A1%D7%99%D7%AA_%D7%90%D7%A8%D7%99%D7%94_I" title="הגלקסיה הננסית אריה I – Hebrew" lang="he" hreflang="he" data-title="הגלקסיה הננסית אריה I" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%81%97%E3%81%97%E5%BA%A7I" title="しし座I – Japanese" lang="ja" hreflang="ja" data-title="しし座I" 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-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Lew_I_(galaktyka)" title="Lew I (galaktyka) – Polish" lang="pl" hreflang="pl" data-title="Lew I (galaktyka)" 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/Leo_I" title="Leo I – Portuguese" lang="pt" hreflang="pt" data-title="Leo I" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9B%D0%B5%D0%B2_I_(%D0%BA%D0%B0%D1%80%D0%BB%D0%B8%D0%BA%D0%BE%D0%B2%D0%B0%D1%8F_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D0%B0)" title="Лев I (карликовая галактика) – Russian" lang="ru" hreflang="ru" data-title="Лев I (карликовая галактика)" 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/Lev_I_(trpasli%C4%8Dia_galaxia)" title="Lev I (trpasličia galaxia) – Slovak" lang="sk" hreflang="sk" data-title="Lev I (trpasličia 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/Leo_I_(k%C3%A4%C3%A4pi%C3%B6galaksi)" title="Leo I (kääpiögalaksi) – Finnish" lang="fi" hreflang="fi" data-title="Leo I (kääpiögalaksi)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Leo_I_(dv%C3%A4rggalax)" title="Leo I (dvärggalax) – Swedish" lang="sv" hreflang="sv" data-title="Leo I (dvärggalax)" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Aslan_I_(c%C3%BCce_galaksi)" title="Aslan I (cüce galaksi) – Turkish" lang="tr" hreflang="tr" data-title="Aslan I (cüce 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%9B%D0%B5%D0%B2_I_(%D0%BA%D0%B0%D1%80%D0%BB%D0%B8%D0%BA%D0%BE%D0%B2%D0%B0_%D0%B3%D0%B0%D0%BB%D0%B0%D0%BA%D1%82%D0%B8%D0%BA%D0%B0)" title="Лев I (карликова галактика) – Ukrainian" lang="uk" hreflang="uk" data-title="Лев I (карликова галактика)" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%8D%85%E5%AD%90%E5%BA%A7I" title="獅子座I – Chinese" lang="zh" hreflang="zh" data-title="獅子座I" data-language-autonym="中文" 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data-mw-deduplicate="TemplateStyles:r1101677807">.mw-parser-output .sky-coordinates-display{line-height:1.5em;text-align:right;text-indent:0;text-transform:none;white-space:nowrap}body.skin-vector-legacy .mw-parser-output .sky-coordinates-display{font-size:85%}</style><span class="sky-coordinates-display plainlinks nourlexpansion"><a href="/wiki/Celestial_coordinate_system" class="mw-redirect" title="Celestial coordinate system">Coordinates</a>: <span typeof="mw:File"><span title="Sky map"><img alt="Sky map" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/20px-Jupiter_and_moon.png" decoding="async" width="20" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/30px-Jupiter_and_moon.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/40px-Jupiter_and_moon.png 2x" data-file-width="128" data-file-height="128" /></span></span> <a rel="nofollow" class="external text" href="http://www.wikisky.org/?ra=10.140944444444&de=12.3075&zoom=7&show_grid=1&show_constellation_lines=1&show_constellation_boundaries=1&show_const_names=1&show_galaxies=1&img_source=IMG_all">10<sup>h</sup> 08<sup>m</sup> 27.4<sup>s</sup>, +12° 18′ 27″</a></span></div></div> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none"> Dwarf spheroidal Galaxy in the constellation Leo </div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><tbody><tr><th colspan="2" class="infobox-above" style="background: #ddd;">Leo I</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Ugc5470.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Ugc5470.jpg/290px-Ugc5470.jpg" decoding="async" width="290" height="193" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/29/Ugc5470.jpg/435px-Ugc5470.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/29/Ugc5470.jpg/580px-Ugc5470.jpg 2x" data-file-width="1000" data-file-height="667" /></a></span><div class="infobox-caption">Leo I appears as a faint patch to the right of the bright star, <a href="/wiki/Regulus" title="Regulus">Regulus</a>.</div></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Observation data (<a href="/wiki/Epoch_(astronomy)#Julian_years_and_J2000" title="Epoch (astronomy)">J2000</a> <a href="/wiki/Epoch_(astronomy)" title="Epoch (astronomy)">epoch</a>)</th></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Constellation" title="Constellation">Constellation</a></th><td class="infobox-data"><a href="/wiki/Leo_(constellation)" title="Leo (constellation)">Leo</a></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Right_ascension" title="Right ascension">Right ascension</a></th><td class="infobox-data"><span class="nowrap">10<sup>h</sup> 08<sup>m</sup> 27.4<sup>s</sup></span><sup id="cite_ref-ned_1-0" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Declination" title="Declination">Declination</a></th><td class="infobox-data">+12° 18′ 27″<sup id="cite_ref-ned_1-1" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Redshift" title="Redshift">Redshift</a></th><td class="infobox-data">285 ± 2 km/<a href="/wiki/Second" title="Second">s</a><sup id="cite_ref-ned_1-2" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Cosmic_distance_ladder" title="Cosmic distance ladder">Distance</a></th><td class="infobox-data"><a href="/wiki/1_E21_m" class="mw-redirect" title="1 E21 m">820 ± 70</a> <a href="/wiki/Light-year" title="Light-year">kly</a> (250 ± 20 <a href="/wiki/Parsec" title="Parsec">kpc</a>)<sup id="cite_ref-karachentsevetal2004_2-0" class="reference"><a href="#cite_note-karachentsevetal2004-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Karachentsevetal2006_3-0" class="reference"><a href="#cite_note-Karachentsevetal2006-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a> <small title="in visual light">(V)</small></th><td class="infobox-data">11.2<sup id="cite_ref-ned_1-3" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Absolute_magnitude" title="Absolute magnitude">Absolute magnitude</a> <small title="in visual light">(V)</small></th><td class="infobox-data">−12.0<sup id="cite_ref-RuizLara_4-0" class="reference"><a href="#cite_note-RuizLara-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Characteristics</th></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Galaxy_morphological_classification" title="Galaxy morphological classification">Type</a></th><td class="infobox-data">E;dSph<sup id="cite_ref-ned_1-4" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Mass" title="Mass">Mass</a></th><td class="infobox-data">(2.0 ± 1.0) × 10<sup>7</sup> <a href="/wiki/Solar_mass" title="Solar mass"><var>M</var><sub>☉</sub></a></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;">Size</th><td class="infobox-data">2000 ly<sup id="cite_ref-Pultarova_5-0" class="reference"><a href="#cite_note-Pultarova-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Angular_diameter" title="Angular diameter">Apparent size</a> <small title="in visual light">(V)</small></th><td class="infobox-data">9.8<span class="nowrap" style="padding-left:0.15em;">′</span> × 7.4<span class="nowrap" style="padding-left:0.15em;">′</span><sup id="cite_ref-ned_1-5" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;">Notable features</th><td class="infobox-data"><a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a> satellite</td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Other designations</th></tr><tr><td colspan="2" class="infobox-full-data"><a href="/wiki/Uppsala_General_Catalogue" title="Uppsala General Catalogue">UGC</a> 5470,<sup id="cite_ref-ned_1-6" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Principal_Galaxies_Catalogue" title="Principal Galaxies Catalogue">PGC</a> 29488,<sup id="cite_ref-ned_1-7" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <a href="/wiki/David_Dunlap_Observatory_Catalogue" title="David Dunlap Observatory Catalogue">DDO</a> 74,<sup id="cite_ref-ned_1-8" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> A1006,<sup id="cite_ref-ned_1-9" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Harrington-Wilson #1,<sup id="cite_ref-ned_1-10" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Regulus Dwarf<sup id="cite_ref-ned_1-11" class="reference"><a href="#cite_note-ned-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr></tbody></table> <p><b>Leo I</b> is a <a href="/wiki/Dwarf_spheroidal_galaxy" title="Dwarf spheroidal galaxy">dwarf spheroidal galaxy</a> in the <a href="/wiki/Constellation" title="Constellation">constellation</a> <a href="/wiki/Leo_(constellation)" title="Leo (constellation)">Leo</a>. At about 820,000 <a href="/wiki/Light-year" title="Light-year">light-years</a> distant, it is a member of the <a href="/wiki/Local_Group" title="Local Group">Local Group</a> of galaxies and is thought to be one of the most distant satellites of the <a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a> galaxy. It was discovered in 1950 by <a href="/wiki/Albert_George_Wilson" title="Albert George Wilson">Albert George Wilson</a> on <a href="/wiki/Photographic_plate" title="Photographic plate">photographic plates</a> of the <a href="/wiki/National_Geographic_Society_%E2%80%93_Palomar_Observatory_Sky_Survey" title="National Geographic Society – Palomar Observatory Sky Survey">National Geographic Society – Palomar Observatory Sky Survey</a>, which were taken with the 48-inch <a href="/wiki/Schmidt_camera" title="Schmidt camera">Schmidt camera</a> at <a href="/wiki/Palomar_Observatory" title="Palomar Observatory">Palomar Observatory</a>.<sup id="cite_ref-SEDS_6-0" class="reference"><a href="#cite_note-SEDS-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Bergh_7-0" class="reference"><a href="#cite_note-Bergh-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Visibility">Visibility</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Leo_I_(dwarf_galaxy)&action=edit&section=1" title="Edit section: Visibility"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Leo I is located only 12 <a href="/wiki/Minute_of_arc" class="mw-redirect" title="Minute of arc">arc minutes</a> from <a href="/wiki/Regulus" title="Regulus">Regulus</a>, the brightest star in the constellation. For that reason, the galaxy is sometimes called the <i>Regulus Dwarf</i>. Scattered light from the star makes studying the galaxy more difficult, and it was not until the 1990s that it was detected visually.<sup id="cite_ref-SEDS_6-1" class="reference"><a href="#cite_note-SEDS-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Bergh_7-1" class="reference"><a href="#cite_note-Bergh-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>The proximity of <a href="/wiki/Regulus" title="Regulus">Regulus</a> and the low surface brightness make it a real challenge to observe. Medium-sized amateur telescopes (15 cm or more) and a dark sky appear to be required for a sighting. But some reports of April 2013 tell that one observer with an 11 cm mini Dobson and even a refractor as small as 7 cm f/10 has sighted Leo I under very dark sky conditions.<sup id="cite_ref-sighting_8-0" class="reference"><a href="#cite_note-sighting-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mass">Mass</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Leo_I_(dwarf_galaxy)&action=edit&section=2" title="Edit section: Mass"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The measurement of <a href="/wiki/Radial_velocity" title="Radial velocity">radial velocities</a> of some bright <a href="/wiki/Red_giant" title="Red giant">red giants</a> in Leo I have made possible to measure its mass. It was found to be at least (2.0 ± 1.0) × 10<sup>7</sup> <a href="/wiki/Solar_mass" title="Solar mass"><var>M</var><sub>☉</sub></a>. The results are not conclusive, and do not exclude or confirm the existence of a large <a href="/wiki/Dark_matter" title="Dark matter">dark matter</a> halo around the galaxy. However, it seems to be certain that the galaxy does not rotate.<sup id="cite_ref-Bergh_7-2" class="reference"><a href="#cite_note-Bergh-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>A kinematic study of Leo I could not place much constraints on dark matter, but suggested the presence of a <a href="/wiki/Black_hole" title="Black hole">black hole</a> of three million <a href="/wiki/Solar_mass" title="Solar mass">solar masses</a> in the center of the galaxy. This would be significant, as it would be the first time this has been done with a dwarf spheroidal galaxy.<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> A black hole of three million solar masses is comparable to the mass of the Milky Way's black hole, <a href="/wiki/Sagittarius_A*" title="Sagittarius A*">Sagittarius A*</a>.<sup id="cite_ref-Pultarova_5-1" class="reference"><a href="#cite_note-Pultarova-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> However, another study could not confirm this, suggesting at most an intermediate-mass black hole of a few 10<sup>5</sup> solar masses.<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> </p><p>It has been suggested that Leo I is a tidal debris stream in the outer <a href="/wiki/Galactic_halo" title="Galactic halo">halo</a> of the Milky Way. This hypothesis has not been confirmed, however.<sup id="cite_ref-Bergh_7-3" class="reference"><a href="#cite_note-Bergh-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Star_formation">Star formation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Leo_I_(dwarf_galaxy)&action=edit&section=3" title="Edit section: Star formation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Typical to a dwarf galaxy, the <a href="/wiki/Metallicity" title="Metallicity">metallicity</a> of Leo I is very low, only one percent that of the <a href="/wiki/Sun" title="Sun">Sun</a>. Gallart et al. (1999) deduce from <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble Space Telescope</a> observations that the galaxy experienced a major increase (accounting for 70% to 80% of its population) in its star formation rate between 6 <a href="/wiki/Annum" class="mw-redirect" title="Annum">Ga</a> and 2 Ga (billion years ago). There is no significant evidence of any stars that are more than 10 Ga old. About 1 Ga ago, star formation in Leo I appears to have dropped suddenly to an almost negligible rate, roughly coinciding with its latest periastron passage of the Milky Way. <a href="/wiki/Ram_pressure" title="Ram pressure">Ram pressure</a> stripping would have removed its gas, decreasing its star formation rate.<sup id="cite_ref-RuizLara_4-1" class="reference"><a href="#cite_note-RuizLara-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Some low-level activity may have continued until 200-500 Ma. Therefore, it is thought to be the youngest dwarf spheroidal satellite galaxy of the Milky Way. In addition, the galaxy may be embedded in a cloud of ionized gas with a mass similar to that of the whole galaxy.<sup id="cite_ref-Bergh_7-4" class="reference"><a href="#cite_note-Bergh-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Bergh2000_11-0" class="reference"><a href="#cite_note-Bergh2000-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <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=Leo_I_(dwarf_galaxy)&action=edit&section=4" 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"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-ned-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-ned_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ned_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ned_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-ned_1-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-ned_1-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-ned_1-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-ned_1-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-ned_1-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-ned_1-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-ned_1-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-ned_1-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-ned_1-11"><sup><i><b>l</b></i></sup></a></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://nedwww.ipac.caltech.edu/">"NASA/IPAC Extragalactic Database"</a>. <i>Results for Leo I</i><span class="reference-accessdate">. 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"The central black hole in the dwarf spheroidal galaxy Leo I: Not supermassive, at most an intermediate-mass candidate". <i>Astronomy & Astrophysics</i>. <b>684</b>: L19. <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/2403.14784">2403.14784</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/2024A&A...684L..19P">2024A&A...684L..19P</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202449620">10.1051/0004-6361/202449620</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+%26+Astrophysics&rft.atitle=The+central+black+hole+in+the+dwarf+spheroidal+galaxy+Leo+I%3A+Not+supermassive%2C+at+most+an+intermediate-mass+candidate&rft.volume=684&rft.pages=L19&rft.date=2024&rft_id=info%3Aarxiv%2F2403.14784&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202449620&rft_id=info%3Abibcode%2F2024A%26A...684L..19P&rft.aulast=Pascale&rft.aufirst=R.&rft.au=Nipoti%2C+C.&rft.au=Calura%2C+F.&rft.au=Della+Croce%2C+A.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALeo+I+%28dwarf+galaxy%29" class="Z3988"></span></span> </li> <li id="cite_note-Bergh2000-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-Bergh2000_11-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFvan_den_Bergh2000" class="citation journal cs1"><a href="/wiki/Sidney_van_den_Bergh" title="Sidney van den Bergh">van den Bergh, Sidney</a> (April 2000). "Updated Information on the Local Group". <i>The Publications of the Astronomical Society of the Pacific</i>. 1sss. <b>112</b> (770): <span class="nowrap">529–</span>536. <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/astro-ph/0001040">astro-ph/0001040</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/2000PASP..112..529V">2000PASP..112..529V</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1086%2F316548">10.1086/316548</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:1805423">1805423</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Publications+of+the+Astronomical+Society+of+the+Pacific&rft.atitle=Updated+Information+on+the+Local+Group&rft.volume=112&rft.issue=770&rft.pages=%3Cspan+class%3D%22nowrap%22%3E529-%3C%2Fspan%3E536&rft.date=2000-04&rft_id=info%3Aarxiv%2Fastro-ph%2F0001040&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A1805423%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1086%2F316548&rft_id=info%3Abibcode%2F2000PASP..112..529V&rft.aulast=van+den+Bergh&rft.aufirst=Sidney&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALeo+I+%28dwarf+galaxy%29" class="Z3988"></span></span> </li> </ol></div></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=Leo_I_(dwarf_galaxy)&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Leo_I" class="extiw" title="commons:Category:Leo I">Leo I</a></span>.</div></div> </div> <ul><li class="mw-empty-elt"></li> <li>Leo I (dwarf galaxy) on <a href="/wiki/WikiSky" class="mw-redirect" title="WikiSky">WikiSky</a>: <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=DSS2">DSS2</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=SDSS">SDSS</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=GALEX">GALEX</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=IRAS">IRAS</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=HALPHA">Hydrogen α</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=RASS">X-Ray</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I&img_source=IMG_all">Astrophoto</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Leo+I">Sky Map</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/starview?object=Leo+I">Articles and images</a></li> <li><a rel="nofollow" class="external text" href="https://apod.nasa.gov/apod/ap991003.html">NASA Astronomy Picture of the Day: Leo I (3 October 1999)</a></li> <li><a rel="nofollow" class="external text" href="http://spider.seds.org/spider/LG/leo1.html">SEDS page on Leo I</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist 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title="Observable universe">Observable universe</a> <span style="font-size:120%">→</span> <a href="/wiki/Universe" title="Universe">Universe</a><br /><span style="font-size:85%;">Each arrow (<span style="font-size:120%">→</span>) may be read as "within" or "part of".</span></div></td><td class="noviewer navbox-image" rowspan="4" style="width:1px;padding:0 0 0 2px"><div><figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/File:Artist%E2%80%99s_impression_of_the_Milky_Way.jpg" class="mw-file-description" title="The Milky Way Galaxy"><img alt="The Milky Way Galaxy" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Artist%E2%80%99s_impression_of_the_Milky_Way.jpg/85px-Artist%E2%80%99s_impression_of_the_Milky_Way.jpg" decoding="async" width="85" height="85" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Artist%E2%80%99s_impression_of_the_Milky_Way.jpg/128px-Artist%E2%80%99s_impression_of_the_Milky_Way.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Artist%E2%80%99s_impression_of_the_Milky_Way.jpg/170px-Artist%E2%80%99s_impression_of_the_Milky_Way.jpg 2x" data-file-width="5600" data-file-height="5600" /></a><figcaption>The Milky Way Galaxy</figcaption></figure></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Structure</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Galactic_Center" title="Galactic Center">Galactic Center</a></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/Sagittarius_A" title="Sagittarius A">Sagittarius A</a></li> <li><a href="/wiki/Sagittarius_A*" title="Sagittarius A*">Sagittarius A*</a> <ul><li><a href="/wiki/Fermi_bubble" class="mw-redirect" title="Fermi bubble">Fermi bubbles</a></li></ul></li> <li><a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">Supermassive black hole</a></li> <li><a href="/wiki/Galactic_Center_filament" title="Galactic Center filament">Galactic Center filaments</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Galactic_disc#Structure_of_the_Milky_Way_Disc" title="Galactic disc">Disk</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/Carina%E2%80%93Sagittarius_Arm" title="Carina–Sagittarius Arm">Carina–Sagittarius</a></li> <li><a href="/wiki/Norma_Arm" title="Norma Arm">Norma–Cygnus</a></li> <li><a href="/wiki/Orion_Arm" title="Orion Arm">Orion–Cygnus</a></li> <li><a href="/wiki/Perseus_Arm" title="Perseus Arm">Perseus</a></li> <li><a href="/wiki/Scutum%E2%80%93Centaurus_Arm" title="Scutum–Centaurus Arm">Scutum–Centaurus</a></li> <li><a href="/wiki/Near_3_kpc_Arm" title="Near 3 kpc Arm">Near 3 kpc Arm</a></li> <li><a href="/wiki/Far_3_kpc_Arm" title="Far 3 kpc Arm">Far 3 kpc Arm</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Galactic_halo" title="Galactic halo">Halo</a></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/Aquarius_Stream" title="Aquarius Stream">Aquarius Stream</a></li> <li><a href="/wiki/Fimbulthul_stream" title="Fimbulthul stream">Fimbulthul stream</a></li> <li><a href="/wiki/Gaia_Sausage" title="Gaia Sausage">Gaia Sausage</a></li> <li><a href="/wiki/Helmi_stream" title="Helmi stream">Helmi stream</a></li> <li><a href="/wiki/Magellanic_Stream" title="Magellanic Stream">Magellanic Stream</a></li> <li><a href="/wiki/Monoceros_Ring" title="Monoceros Ring">Monoceros Ring</a></li> <li><a href="/wiki/Palomar_5" title="Palomar 5">Palomar 5</a> stream</li> <li><a href="/wiki/Pisces-Eridanus_stellar_stream" class="mw-redirect" title="Pisces-Eridanus stellar stream">Pisces-Eridanus stream</a></li> <li><a href="/wiki/Sagittarius_Stream" title="Sagittarius Stream">Sagittarius Stream</a></li> <li><a href="/wiki/Virgo_Stellar_Stream" title="Virgo Stellar Stream">Virgo Stream</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Satellite_galaxies_of_the_Milky_Way" title="Satellite galaxies of the Milky Way">Satellite<br />galaxies</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Magellanic_Clouds" title="Magellanic Clouds">Magellanic Clouds</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/Large_Magellanic_Cloud" title="Large Magellanic Cloud">Large Magellanic Cloud</a></li> <li><a href="/wiki/Small_Magellanic_Cloud" title="Small Magellanic Cloud">Small Magellanic Cloud</a></li> <li><a href="/wiki/Magellanic_Bridge" title="Magellanic Bridge">Magellanic Bridge</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Dwarf_galaxy" title="Dwarf galaxy">Dwarfs</a></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/Antlia_II" title="Antlia II">Antlia II</a></li> <li><a href="/wiki/Bo%C3%B6tes_I" title="Boötes I">Boötes I</a></li> <li><a href="/wiki/Bo%C3%B6tes_II" title="Boötes II">Boötes II</a></li> <li><a href="/wiki/Bo%C3%B6tes_III" title="Boötes III">Boötes III</a></li> <li><a href="/wiki/Canes_Venatici_I" title="Canes Venatici I">Canes Venatici I</a></li> <li><a href="/wiki/Canes_Venatici_II" title="Canes Venatici II">Canes Venatici II</a></li> <li><a href="/wiki/Canis_Major_Overdensity" title="Canis Major Overdensity">Canis Major</a></li> <li><a href="/wiki/Carina_Dwarf_Spheroidal_Galaxy" title="Carina Dwarf Spheroidal Galaxy">Carina</a></li> <li><a href="/wiki/Coma_Berenices_(dwarf_galaxy)" title="Coma Berenices (dwarf galaxy)">Coma Berenices</a></li> <li><a href="/wiki/Crater_2_Dwarf" title="Crater 2 Dwarf">Crater 2</a></li> <li><a href="/wiki/Draco_Dwarf" title="Draco Dwarf">Draco</a></li> <li><a href="/wiki/Eridanus_II" title="Eridanus II">Eridanus II</a></li> <li><a href="/wiki/Fornax_Dwarf" title="Fornax Dwarf">Fornax</a></li> <li><a href="/wiki/Hercules_(dwarf_galaxy)" title="Hercules (dwarf galaxy)">Hercules</a></li> <li><a class="mw-selflink selflink">Leo I</a></li> <li><a href="/wiki/Leo_II_(dwarf_galaxy)" title="Leo II (dwarf galaxy)">Leo II</a></li> <li><a href="/wiki/Leo_IV_(dwarf_galaxy)" title="Leo IV (dwarf galaxy)">Leo IV</a></li> <li><a href="/wiki/Leo_V_(dwarf_galaxy)" title="Leo V (dwarf galaxy)">Leo V</a></li> <li><a href="/wiki/Leo_T" title="Leo T">Leo T</a></li> <li><a href="/wiki/Phoenix_Dwarf" title="Phoenix Dwarf">Phoenix</a></li> <li><a href="/wiki/Pisces_Overdensity" title="Pisces Overdensity">Pisces Overdensity</a></li> <li><a href="/wiki/Pisces_II" title="Pisces II">Pisces II</a></li> <li><a href="/wiki/Reticulum_II" title="Reticulum II">Reticulum II</a></li> <li><a href="/wiki/Sagittarius_Dwarf_Spheroidal_Galaxy" title="Sagittarius Dwarf Spheroidal Galaxy">Sagittarius Spheroidal</a></li> <li><a href="/wiki/Segue_1" title="Segue 1">Segue 1</a></li> <li><a href="/wiki/Segue_2" title="Segue 2">Segue 2</a></li> <li><a href="/wiki/Sculptor_Dwarf_Galaxy" title="Sculptor Dwarf Galaxy">Sculptor</a></li> <li><a href="/wiki/Sextans_Dwarf_Spheroidal" title="Sextans Dwarf Spheroidal">Sextans</a></li> <li><a href="/wiki/Triangulum_II" title="Triangulum II">Triangulum II</a></li> <li><a href="/wiki/Ursa_Major_I_Dwarf" title="Ursa Major I Dwarf">Ursa Major I</a></li> <li><a href="/wiki/Ursa_Major_II_Dwarf" title="Ursa Major II Dwarf">Ursa Major II</a></li> <li><a href="/wiki/Ursa_Major_III" title="Ursa Major III">Ursa Major III</a></li> <li><a href="/wiki/Ursa_Minor_Dwarf" title="Ursa Minor Dwarf">Ursa Minor</a></li> <li><a href="/wiki/Virgo_I" title="Virgo I">Virgo I</a></li> <li><a href="/wiki/Willman_1" title="Willman 1">Willman 1</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_names_for_the_Milky_Way" class="mw-redirect" title="List of names for the Milky Way">Alternate names</a></li> <li><a href="/wiki/Andromeda%E2%80%93Milky_Way_collision" 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