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Disponible en 47 langues." > <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-47" 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">47 langues</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D8%AF%D9%8A%D9%85_%D8%B9%D8%A7%D9%83%D8%B3" title="سديم عاكس – arabe" lang="ar" hreflang="ar" data-title="سديم عاكس" data-language-autonym="العربية" data-language-local-name="arabe" 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%90%D0%B4%D0%B1%D1%96%D0%B2%D0%B0%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F_%D1%82%D1%83%D0%BC%D0%B0%D0%BD%D0%BD%D0%B0%D1%81%D1%86%D1%8C" title="Адбівальная туманнасць – biélorusse" lang="be" hreflang="be" data-title="Адбівальная туманнасць" data-language-autonym="Беларуская" data-language-local-name="biélorusse" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9E%D1%82%D1%80%D0%B0%D0%B7%D1%8F%D0%B2%D0%B0%D1%89%D0%B0_%D0%BC%D1%8A%D0%B3%D0%BB%D1%8F%D0%B2%D0%B8%D0%BD%D0%B0" title="Отразяваща мъглявина – bulgare" lang="bg" hreflang="bg" data-title="Отразяваща мъглявина" data-language-autonym="Български" data-language-local-name="bulgare" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%B0%E0%A4%BF%E0%A4%AB%E0%A5%8D%E0%A4%B2%E0%A5%87%E0%A4%95%E0%A5%8D%E0%A4%B6%E0%A4%A8_%E0%A4%A8%E0%A5%87%E0%A4%AC%E0%A5%81%E0%A4%B2%E0%A4%BE" title="रिफ्लेक्शन नेबुला – Bhojpuri" lang="bh" hreflang="bh" data-title="रिफ्लेक्शन नेबुला" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%A4%E0%A6%BF%E0%A6%AB%E0%A6%B2%E0%A6%A8_%E0%A6%A8%E0%A7%80%E0%A6%B9%E0%A6%BE%E0%A6%B0%E0%A6%BF%E0%A6%95%E0%A6%BE" title="প্রতিফলন নীহারিকা – bengali" lang="bn" hreflang="bn" data-title="প্রতিফলন নীহারিকা" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Odrazna_maglina" title="Odrazna maglina – bosniaque" lang="bs" hreflang="bs" data-title="Odrazna maglina" data-language-autonym="Bosanski" data-language-local-name="bosniaque" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Nebulosa_de_reflexi%C3%B3" title="Nebulosa de reflexió – catalan" lang="ca" hreflang="ca" data-title="Nebulosa de reflexió" data-language-autonym="Català" data-language-local-name="catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Reflexn%C3%AD_mlhovina" title="Reflexní mlhovina – tchèque" lang="cs" hreflang="cs" data-title="Reflexní mlhovina" data-language-autonym="Čeština" data-language-local-name="tchèque" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Reflexionsnebel" title="Reflexionsnebel – allemand" lang="de" hreflang="de" data-title="Reflexionsnebel" data-language-autonym="Deutsch" data-language-local-name="allemand" 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%9D%CE%B5%CF%86%CE%AD%CE%BB%CF%89%CE%BC%CE%B1_%CE%B1%CE%BD%CE%AC%CE%BA%CE%BB%CE%B1%CF%83%CE%B7%CF%82" title="Νεφέλωμα ανάκλασης – grec" lang="el" hreflang="el" data-title="Νεφέλωμα ανάκλασης" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Reflection_nebula" title="Reflection nebula – anglais" lang="en" hreflang="en" data-title="Reflection nebula" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Reflekta_nebulozo" title="Reflekta nebulozo – espéranto" lang="eo" hreflang="eo" data-title="Reflekta nebulozo" data-language-autonym="Esperanto" data-language-local-name="espéranto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Nebulosa_de_reflexi%C3%B3n" title="Nebulosa de reflexión – espagnol" lang="es" hreflang="es" data-title="Nebulosa de reflexión" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Peegeldav_udu" title="Peegeldav udu – estonien" lang="et" hreflang="et" data-title="Peegeldav udu" data-language-autonym="Eesti" data-language-local-name="estonien" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Islapen-nebulosa" title="Islapen-nebulosa – basque" lang="eu" hreflang="eu" data-title="Islapen-nebulosa" data-language-autonym="Euskara" data-language-local-name="basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%D8%AD%D8%A7%D8%A8%DB%8C_%D8%A8%D8%A7%D8%B2%D8%AA%D8%A7%D8%A8%DB%8C" title="سحابی بازتابی – persan" lang="fa" hreflang="fa" data-title="سحابی بازتابی" data-language-autonym="فارسی" data-language-local-name="persan" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Heijastussumu" title="Heijastussumu – finnois" lang="fi" hreflang="fi" data-title="Heijastussumu" data-language-autonym="Suomi" data-language-local-name="finnois" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Nebulosa_de_reflexi%C3%B3n" title="Nebulosa de reflexión – galicien" lang="gl" hreflang="gl" data-title="Nebulosa de reflexión" data-language-autonym="Galego" data-language-local-name="galicien" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A2%D7%A8%D7%A4%D7%99%D7%9C%D7%99%D7%AA_%D7%94%D7%97%D7%96%D7%A8%D7%94" title="ערפילית החזרה – hébreu" lang="he" hreflang="he" data-title="ערפילית החזרה" data-language-autonym="עברית" data-language-local-name="hébreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A4%BE%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A5%80_%E0%A4%A8%E0%A5%80%E0%A4%B9%E0%A4%BE%E0%A4%B0%E0%A4%BF%E0%A4%95%E0%A4%BE" title="परावर्ती नीहारिका – hindi" lang="hi" hreflang="hi" data-title="परावर्ती नीहारिका" 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/Odrazna_maglica" title="Odrazna maglica – croate" lang="hr" hreflang="hr" data-title="Odrazna maglica" data-language-autonym="Hrvatski" data-language-local-name="croate" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Reflexi%C3%B3s_k%C3%B6d" title="Reflexiós köd – hongrois" lang="hu" hreflang="hu" data-title="Reflexiós köd" data-language-autonym="Magyar" data-language-local-name="hongrois" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Nebula_refleksi" title="Nebula refleksi – indonésien" lang="id" hreflang="id" data-title="Nebula refleksi" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésien" 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/Nebulosa_a_riflessione" title="Nebulosa a riflessione – italien" lang="it" hreflang="it" data-title="Nebulosa a riflessione" data-language-autonym="Italiano" data-language-local-name="italien" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%8F%8D%E5%B0%84%E6%98%9F%E9%9B%B2" title="反射星雲 – japonais" lang="ja" hreflang="ja" data-title="反射星雲" data-language-autonym="日本語" data-language-local-name="japonais" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B0%98%EC%82%AC%EC%84%B1%EC%9A%B4" title="반사성운 – coréen" lang="ko" hreflang="ko" data-title="반사성운" data-language-autonym="한국어" data-language-local-name="coréen" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Reflexiounsniwwel" title="Reflexiounsniwwel – luxembourgeois" lang="lb" hreflang="lb" data-title="Reflexiounsniwwel" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxembourgeois" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Atspind%C5%BEio_%C5%ABkas" title="Atspindžio ūkas – lituanien" lang="lt" hreflang="lt" data-title="Atspindžio ūkas" data-language-autonym="Lietuvių" data-language-local-name="lituanien" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D1%82%D1%81%D1%98%D0%B0%D1%98%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BB%D0%B8%D0%BD%D0%B0" title="Отсјајна маглина – macédonien" lang="mk" hreflang="mk" data-title="Отсјајна маглина" data-language-autonym="Македонски" data-language-local-name="macédonien" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Reflectienevel" title="Reflectienevel – néerlandais" lang="nl" hreflang="nl" data-title="Reflectienevel" data-language-autonym="Nederlands" data-language-local-name="néerlandais" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Refleksjonst%C3%A5ke" title="Refleksjonståke – norvégien nynorsk" lang="nn" hreflang="nn" data-title="Refleksjonståke" data-language-autonym="Norsk nynorsk" data-language-local-name="norvégien nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Refleksjonst%C3%A5ke" title="Refleksjonståke – norvégien bokmål" lang="nb" hreflang="nb" data-title="Refleksjonståke" data-language-autonym="Norsk bokmål" data-language-local-name="norvégien bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Mg%C5%82awica_refleksyjna" title="Mgławica refleksyjna – polonais" lang="pl" hreflang="pl" data-title="Mgławica refleksyjna" data-language-autonym="Polski" data-language-local-name="polonais" 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/Nebulosa_de_reflex%C3%A3o" title="Nebulosa de reflexão – portugais" lang="pt" hreflang="pt" data-title="Nebulosa de reflexão" data-language-autonym="Português" data-language-local-name="portugais" 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/Nebuloas%C4%83_de_reflexie" title="Nebuloasă de reflexie – roumain" lang="ro" hreflang="ro" data-title="Nebuloasă de reflexie" data-language-autonym="Română" data-language-local-name="roumain" 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%9E%D1%82%D1%80%D0%B0%D0%B6%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F_%D1%82%D1%83%D0%BC%D0%B0%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C" title="Отражательная туманность – russe" lang="ru" hreflang="ru" data-title="Отражательная туманность" data-language-autonym="Русский" data-language-local-name="russe" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Refleksiona_maglina" title="Refleksiona maglina – serbo-croate" lang="sh" hreflang="sh" data-title="Refleksiona maglina" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croate" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Reflection_nebula" title="Reflection nebula – Simple English" lang="en-simple" hreflang="en-simple" data-title="Reflection nebula" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Reflexn%C3%A1_hmlovina" title="Reflexná hmlovina – slovaque" lang="sk" hreflang="sk" data-title="Reflexná hmlovina" data-language-autonym="Slovenčina" data-language-local-name="slovaque" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A0%D0%B5%D1%84%D0%BB%D0%B5%D0%BA%D1%81%D0%B8%D0%BE%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BB%D0%B8%D0%BD%D0%B0" title="Рефлексиона маглина – serbe" lang="sr" hreflang="sr" data-title="Рефлексиона маглина" data-language-autonym="Српски / srpski" data-language-local-name="serbe" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Reflektionsnebulosa" title="Reflektionsnebulosa – suédois" lang="sv" hreflang="sv" data-title="Reflektionsnebulosa" data-language-autonym="Svenska" data-language-local-name="suédois" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%99%E0%B8%9A%E0%B8%B4%E0%B8%A7%E0%B8%A5%E0%B8%B2%E0%B8%AA%E0%B8%B0%E0%B8%97%E0%B9%89%E0%B8%AD%E0%B8%99%E0%B9%81%E0%B8%AA%E0%B8%87" title="เนบิวลาสะท้อนแสง – thaï" lang="th" hreflang="th" data-title="เนบิวลาสะท้อนแสง" data-language-autonym="ไทย" data-language-local-name="thaï" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Yans%C4%B1_bulutsusu" title="Yansı bulutsusu – turc" lang="tr" hreflang="tr" data-title="Yansı bulutsusu" data-language-autonym="Türkçe" data-language-local-name="turc" 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%D1%96%D0%B4%D0%B1%D0%B8%D0%B2%D0%BD%D0%B0_%D1%82%D1%83%D0%BC%D0%B0%D0%BD%D0%BD%D1%96%D1%81%D1%82%D1%8C" title="Відбивна туманність – ukrainien" lang="uk" hreflang="uk" data-title="Відбивна туманність" data-language-autonym="Українська" data-language-local-name="ukrainien" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Tinh_v%C3%A2n_ph%E1%BA%A3n_x%E1%BA%A1" title="Tinh vân phản xạ – vietnamien" lang="vi" hreflang="vi" data-title="Tinh vân phản xạ" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamien" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a 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<div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="fr" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fichier:Reflection_nebula_IC_349_near_Merope.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Reflection_nebula_IC_349_near_Merope.jpg/220px-Reflection_nebula_IC_349_near_Merope.jpg" decoding="async" width="220" height="247" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Reflection_nebula_IC_349_near_Merope.jpg/330px-Reflection_nebula_IC_349_near_Merope.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Reflection_nebula_IC_349_near_Merope.jpg/440px-Reflection_nebula_IC_349_near_Merope.jpg 2x" data-file-width="645" data-file-height="724" /></a><figcaption>Nébuleuse par réflexion dans les <a href="/wiki/Pl%C3%A9iades_(astronomie)" title="Pléiades (astronomie)">Pléiades</a> (<a href="/wiki/Catalogue_de_Messier" title="Catalogue de Messier">M45</a>).</figcaption></figure> <p>En <a href="/wiki/Astronomie" title="Astronomie">astronomie</a>, les <b><a href="/wiki/N%C3%A9buleuse" title="Nébuleuse">nébuleuses</a> par réflexion</b> sont des <a href="/wiki/Milieu_interstellaire" title="Milieu interstellaire">nuages de poussières</a> qui réfléchissent la <a href="/wiki/Lumi%C3%A8re" title="Lumière">lumière</a> d'une ou plusieurs <a href="/wiki/%C3%89toile" title="Étoile">étoiles</a> voisines. Ces étoiles ne sont pas assez chaudes pour causer l'<a href="/wiki/Ionisation" title="Ionisation">ionisation</a> des <a href="/wiki/Gaz" title="Gaz">gaz</a>, comme dans le cas des <a href="/wiki/N%C3%A9buleuse_en_%C3%A9mission" title="Nébuleuse en émission">nébuleuses en émission</a>, mais sont assez lumineuses pour permettre une dispersion suffisante pour rendre la poussière visible. La distinction entre ces deux types de nébuleuses a été faite par <a href="/wiki/Edwin_Hubble" title="Edwin Hubble">Edwin Hubble</a> en <a href="/wiki/1922" title="1922">1922</a>. </p><p>Les nébuleuses par réflexion sont souvent des emplacements de <a href="/wiki/Naissance_des_%C3%A9toiles" title="Naissance des étoiles">formation d'étoiles</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Physique_de_leur_émission"><span id="Physique_de_leur_.C3.A9mission"></span>Physique de leur émission</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&veaction=edit&section=1" title="Modifier la section : Physique de leur émission" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&action=edit&section=1" title="Modifier le code source de la section : Physique de leur émission"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Les nébuleuses par réflexion sont habituellement bleues parce que la diffusion est plus efficace pour la lumière bleue que la rouge (c'est le même procédé de diffusion qui nous donne les <a href="/wiki/Couleur_du_ciel" title="Couleur du ciel">cieux bleus</a> et des couchers de soleil rouges). </p><p>Les nébuleuses par réflexion et les <a href="/wiki/N%C3%A9buleuse_en_%C3%A9mission" title="Nébuleuse en émission">nébuleuses en émission</a> sont souvent vues ensemble, comme la <a href="/wiki/N%C3%A9buleuse_d%27Orion" title="Nébuleuse d'Orion">nébuleuse d'Orion</a> et sont parfois rassemblées en un seul type : les <i>nébuleuses diffuses</i>. </p> <div class="mw-heading mw-heading2"><h2 id="Exemples">Exemples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&veaction=edit&section=2" title="Modifier la section : Exemples" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&action=edit&section=2" title="Modifier le code source de la section : Exemples"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Environ 500 nébuleuses par réflexion sont connues. </p> <ul><li>Parmi les plus belles on trouve l'entourage des étoiles des <a href="/wiki/Pl%C3%A9iades_(astronomie)" title="Pléiades (astronomie)">Pléiades</a>.</li> <li>Une nébuleuse par réflexion bleue peut également être vue dans le même secteur du ciel que la <a href="/wiki/N%C3%A9buleuse_Trifide" title="Nébuleuse Trifide">nébuleuse Trifide</a>.</li> <li>L'<a href="/wiki/G%C3%A9ante_rouge" title="Géante rouge">étoile géante</a> <a href="/wiki/Antar%C3%A8s" title="Antarès">Antarès</a>, qui est très rouge (<a href="/wiki/Type_spectral" title="Type spectral">classe spectrale</a> M1), est entourée par une grande nébuleuse de réflexion rouge.</li> <li>On peut également citer la <a href="/wiki/IC_2118" class="mw-redirect" title="IC 2118">nébuleuse de la tête Sorcière</a>, située près de l'étoile <a href="/wiki/Rigel" title="Rigel">Rigel</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Loi_de_luminosité_de_Hubble"><span id="Loi_de_luminosit.C3.A9_de_Hubble"></span>Loi de luminosité de Hubble</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&veaction=edit&section=3" title="Modifier la section : Loi de luminosité de Hubble" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=N%C3%A9buleuse_par_r%C3%A9flexion&action=edit&section=3" title="Modifier le code source de la section : Loi de luminosité de Hubble"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En 1922, Edwin Hubble a publié le résultat de ses investigations sur les nébuleuses lumineuses. Une partie de ce travail est la loi de luminosité de Hubble pour les nébuleuses de réflexion qui établit une relation entre la taille angulaire (<i>r</i>) de la nébuleuse et la <a href="/wiki/Magnitude_apparente" title="Magnitude apparente">magnitude apparente</a> (<i>m</i>) de l'étoile associée : </p> <dl><dd>5 <a href="/wiki/Logarithme" title="Logarithme">log</a>(<i>r</i>) = - <i>m</i> + <i>k</i></dd></dl> <p>où <i>k</i> est une constante qui dépend de la sensibilité des instruments de mesure. </p> <ul id="bandeau-portail" class="bandeau-portail"><li><span class="bandeau-portail-element"><span class="bandeau-portail-icone"><span class="noviewer skin-invert-image" typeof="mw:File"><a href="/wiki/Portail:Astronomie" title="Portail de l’astronomie"><img alt="icône décorative" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Noun_Astronomy_Icon2.svg/25px-Noun_Astronomy_Icon2.svg.png" decoding="async" width="25" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Noun_Astronomy_Icon2.svg/37px-Noun_Astronomy_Icon2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/Noun_Astronomy_Icon2.svg/50px-Noun_Astronomy_Icon2.svg.png 2x" data-file-width="755" data-file-height="730" /></a></span></span> <span class="bandeau-portail-texte"><a href="/wiki/Portail:Astronomie" title="Portail:Astronomie">Portail de l’astronomie</a></span> </span></li> </ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Ce document provient de « <a dir="ltr" href="https://fr.wikipedia.org/w/index.php?title=Nébuleuse_par_réflexion&oldid=202965542">https://fr.wikipedia.org/w/index.php?title=Nébuleuse_par_réflexion&oldid=202965542</a> ».</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Cat%C3%A9gorie:Accueil" title="Catégorie:Accueil">Catégorie</a> : <ul><li><a href="/wiki/Cat%C3%A9gorie:N%C3%A9buleuse_par_r%C3%A9flexion" title="Catégorie:Nébuleuse par réflexion">Nébuleuse par réflexion</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Catégories cachées : <ul><li><a href="/wiki/Cat%C3%A9gorie:Portail:Astronomie/Articles_li%C3%A9s" title="Catégorie:Portail:Astronomie/Articles liés">Portail:Astronomie/Articles liés</a></li><li><a href="/wiki/Cat%C3%A9gorie:Portail:Sciences_de_la_Terre_et_de_l%27Univers/Articles_li%C3%A9s" title="Catégorie:Portail:Sciences de la Terre et de l'Univers/Articles liés">Portail:Sciences de la Terre et de l'Univers/Articles liés</a></li><li><a href="/wiki/Cat%C3%A9gorie:Portail:Sciences/Articles_li%C3%A9s" title="Catégorie:Portail:Sciences/Articles liés">Portail:Sciences/Articles liés</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> La dernière modification de cette page a été faite le 5 avril 2023 à 12:14.</li> <li id="footer-info-copyright"><span style="white-space: normal"><a href="/wiki/Wikip%C3%A9dia:Citation_et_r%C3%A9utilisation_du_contenu_de_Wikip%C3%A9dia" title="Wikipédia:Citation et réutilisation du contenu de Wikipédia">Droit d'auteur</a> : les textes sont disponibles sous <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.fr">licence Creative Commons attribution, partage dans les mêmes conditions</a> ; d’autres conditions peuvent s’appliquer. 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