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class="vector-toc-numb">3.1</span> <span>Articles connexes</span> </div> </a> <ul id="toc-Articles_connexes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Liens_externes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Liens_externes"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Liens externes</span> </div> </a> <ul id="toc-Liens_externes-sublist" class="vector-toc-list"> </ul> </li> </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="Sommaire" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table des matières" > <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="Basculer la table des matières" > <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">Basculer la table des matières</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">Two-Micron All-Sky Survey</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" 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Disponible en 31 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-31" 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">31 langues</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/2MASS" title="2MASS – afrikaans" lang="af" hreflang="af" data-title="2MASS" 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%85%D8%B3%D8%AD_%D9%85%D9%8A%D9%83%D8%B1%D9%88%D9%8A_%D8%AB%D9%86%D8%A7%D8%A6%D9%8A_%D9%84%D9%83%D8%A7%D9%85%D9%84_%D8%A7%D9%84%D8%B3%D9%85%D8%A7%D8%A1" title="مسح ميكروي ثنائي لكامل السماء – arabe" lang="ar" hreflang="ar" data-title="مسح ميكروي ثنائي لكامل السماء" data-language-autonym="العربية" data-language-local-name="arabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/2%D9%85%D8%A7%D8%B3" title="2ماس – arabe égyptien" lang="arz" hreflang="arz" data-title="2ماس" data-language-autonym="مصرى" data-language-local-name="arabe égyptien" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/2MASS" title="2MASS – catalan" lang="ca" hreflang="ca" data-title="2MASS" 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/2MASS" title="2MASS – tchèque" lang="cs" hreflang="cs" data-title="2MASS" 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/Two_Micron_All_Sky_Survey" title="Two Micron All Sky Survey – allemand" lang="de" hreflang="de" data-title="Two Micron All Sky Survey" 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/2MASS" title="2MASS – grec" lang="el" hreflang="el" data-title="2MASS" 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/2MASS" title="2MASS – anglais" lang="en" hreflang="en" data-title="2MASS" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/2MASS" title="2MASS – espagnol" lang="es" hreflang="es" data-title="2MASS" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%B1%D8%B1%D8%B3%DB%8C_%D8%AF%D9%88_%D9%85%DB%8C%DA%A9%D8%B1%D9%88%D9%86_%D9%87%D9%85%D9%87_%D8%A2%D8%B3%D9%85%D8%A7%D9%86" title="بررسی دو میکرون همه آسمان – persan" lang="fa" hreflang="fa" data-title="بررسی دو میکرون همه آسمان" data-language-autonym="فارسی" data-language-local-name="persan" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/2MASS" title="2MASS – irlandais" lang="ga" hreflang="ga" data-title="2MASS" data-language-autonym="Gaeilge" data-language-local-name="irlandais" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/2%E0%A4%AE%E0%A4%BE%E0%A4%B8" title="2मास – hindi" lang="hi" hreflang="hi" data-title="2मास" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/2MASS" title="2MASS – indonésien" lang="id" hreflang="id" data-title="2MASS" 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/2MASS" title="2MASS – italien" lang="it" hreflang="it" data-title="2MASS" 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/2MASS" title="2MASS – japonais" lang="ja" hreflang="ja" data-title="2MASS" 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/2MASS" title="2MASS – coréen" lang="ko" hreflang="ko" data-title="2MASS" 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/Two_Micron_All_Sky_Survey" title="Two Micron All Sky Survey – luxembourgeois" lang="lb" hreflang="lb" data-title="Two Micron All Sky Survey" 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/2MASS" title="2MASS – lituanien" lang="lt" hreflang="lt" data-title="2MASS" 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/2MASS" title="2MASS – macédonien" lang="mk" hreflang="mk" data-title="2MASS" data-language-autonym="Македонски" data-language-local-name="macédonien" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/2MASS" title="2MASS – birman" lang="my" hreflang="my" data-title="2MASS" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birman" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/2MASS" title="2MASS – néerlandais" lang="nl" hreflang="nl" data-title="2MASS" data-language-autonym="Nederlands" data-language-local-name="néerlandais" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/2MASS" title="2MASS – norvégien bokmål" lang="nb" hreflang="nb" data-title="2MASS" 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/2MASS" title="2MASS – polonais" lang="pl" hreflang="pl" data-title="2MASS" 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/2MASS" title="2MASS – portugais" lang="pt" hreflang="pt" data-title="2MASS" 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/Two-Micron_All-Sky_Survey" title="Two-Micron All-Sky Survey – roumain" lang="ro" hreflang="ro" data-title="Two-Micron All-Sky Survey" 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/2MASS" title="2MASS – russe" lang="ru" hreflang="ru" data-title="2MASS" data-language-autonym="Русский" data-language-local-name="russe" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/2MASS" title="2MASS – Simple English" lang="en-simple" hreflang="en-simple" data-title="2MASS" 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/2MASS" title="2MASS – slovaque" lang="sk" hreflang="sk" data-title="2MASS" data-language-autonym="Slovenčina" data-language-local-name="slovaque" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/2MASS" title="2MASS – turc" lang="tr" hreflang="tr" data-title="2MASS" 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/2MASS" title="2MASS – ukrainien" lang="uk" hreflang="uk" data-title="2MASS" data-language-autonym="Українська" data-language-local-name="ukrainien" 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/2%E5%BE%AE%E7%B1%B3%E5%85%A8%E5%A4%A9%E5%B7%A1%E5%A4%A9" title="2微米全天巡天 – chinois" lang="zh" hreflang="zh" data-title="2微米全天巡天" data-language-autonym="中文" data-language-local-name="chinois" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a 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mw-parser-output" lang="fr" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r222901683">.mw-parser-output .infobox hr{height:2px;background-color:#E1E1E1}.mw-parser-output .infobox_v3 .row1col{padding:4px;text-align:center;background-color:var(--background-color-neutral-subtle,#f8f9fa);color:var(--color-emphasized,#000000)}</style><div class="infobox_v3 infobox infobox--frwiki noarchive large"><div class="entete" style="background-color:#e0e0e0"><div>2MASS</div></div><div><div class="images" style="padding:2px 0"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/Fichier:2MASS_LSS_chart-NEW_Nasa.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/2MASS_LSS_chart-NEW_Nasa.jpg/260px-2MASS_LSS_chart-NEW_Nasa.jpg" decoding="async" width="260" height="132" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/2MASS_LSS_chart-NEW_Nasa.jpg/390px-2MASS_LSS_chart-NEW_Nasa.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/2MASS_LSS_chart-NEW_Nasa.jpg/520px-2MASS_LSS_chart-NEW_Nasa.jpg 2x" data-file-width="1239" data-file-height="627" /></a></span></div></div><table><caption style="text-align:center;background-color:#e0e0e0">Caractéristiques</caption><tbody><tr class=""><th scope="row">Financé par</th><td class=""><div> <span class="wd_p8324"><a href="/wiki/National_Aeronautics_and_Space_Administration" title="National Aeronautics and Space Administration">National Aeronautics and Space Administration</a><br /><a href="/wiki/Fondation_nationale_pour_la_science" title="Fondation nationale pour la science">Fondation nationale pour la science</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1454942?uselang=fr#P8324" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Opérateur</th><td class=""><div> <span class="wd_p137"><a href="/wiki/Universit%C3%A9_du_Massachusetts_%C3%A0_Amherst" title="Université du Massachusetts à Amherst">Université du Massachusetts à Amherst</a>, <a href="/wiki/Infrared_Processing_and_Analysis_Center" title="Infrared Processing and Analysis Center">Infrared Processing and Analysis Center</a>, <a href="/wiki/National_Aeronautics_and_Space_Administration" title="National Aeronautics and Space Administration">National Aeronautics and Space Administration</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1454942?uselang=fr#P137" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Type</th><td class=""><div> <span class="wd_p31"><a href="/wiki/Catalogue_astronomique" title="Catalogue astronomique">Catalogue astronomique</a>, <a href="/wiki/Relev%C3%A9_astronomique" title="Relevé astronomique">relevé astronomique</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1454942?uselang=fr#P31" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Site web</th><td class=""><div> <span class="wd_p856"><a rel="nofollow" class="external text" href="http://www.ipac.caltech.edu/2mass/">www.ipac.caltech.edu/2mass</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1454942?uselang=fr#P856" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr></tbody></table><p class="navbar noprint bordered navigation-not-searchable" style="border-top:1px solid#e0e0e0"><span class="plainlinks" style="text-align:left"><a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=0">modifier</a> - <a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=0">modifier le code</a> - <a href="https://www.wikidata.org/wiki/Q1454942" class="extiw" title="d:Q1454942">modifier Wikidata</a></span><span style="text-align:right"><span typeof="mw:File"><a href="/wiki/Mod%C3%A8le:Infobox_Observatoire" title="Documentation du modèle"><img alt="Documentation du modèle" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/12px-Info_Simple.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/18px-Info_Simple.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/24px-Info_Simple.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></span></p></div> <p><b>2MASS</b>, pour <i><b><span class="lang-en" lang="en">Two Micron All-Sky Survey</span></b></i> (littéralement « relevé de tout le ciel à [une <a href="/wiki/Longueur_d%27onde" title="Longueur d'onde">longueur d'onde</a> de] deux <a href="/wiki/Microm%C3%A8tre" title="Micromètre">micromètres</a> ») est un <a href="/wiki/Grand_relev%C3%A9" class="mw-redirect" title="Grand relevé">grand relevé</a> réalisé par l'<a href="/wiki/Universit%C3%A9_du_Massachusetts" title="Université du Massachusetts">université du Massachusetts</a>, en collaboration avec le <span class="lang-en" lang="en"><a href="/wiki/Jet_Propulsion_Laboratory" title="Jet Propulsion Laboratory">Jet Propulsion Laboratory</a></span>, la <span class="lang-en" lang="en"><a href="/wiki/National_Science_Foundation" class="mw-redirect" title="National Science Foundation">National Science Foundation</a></span> et la <a href="/wiki/NASA" class="mw-redirect" title="NASA">NASA</a>. Il a été entamé en <a href="/wiki/1997_en_science" title="1997 en science">1997</a> et terminé en <a href="/wiki/2001_en_science" title="2001 en science">2001</a>, à l'aide de deux télescopes automatisés de <span class="nowrap">1,3 <a href="/wiki/M%C3%A8tre" title="Mètre">mètre</a></span> de <a href="/wiki/Diam%C3%A8tre" title="Diamètre">diamètre</a> spécialement construits à cet effet, l'un situé dans l'hémisphère Nord (<a href="/wiki/Observatoire_Fred_Lawrence_Whipple" title="Observatoire Fred Lawrence Whipple">observatoire Fred Lawrence Whipple</a>, <a href="/wiki/Arizona" title="Arizona">Arizona</a>), l'autre dans l'hémisphère Sud (<a href="/wiki/Observatoire_interam%C3%A9ricain_du_Cerro_Tololo" title="Observatoire interaméricain du Cerro Tololo">observatoire interaméricain du Cerro Tololo</a>, <a href="/wiki/Chili" title="Chili">Chili</a>). Les données recueillies ont été finalisées en <a href="/wiki/2003_en_science" title="2003 en science">2003</a>. Il s'agit du second <a href="/wiki/Grand_relev%C3%A9" class="mw-redirect" title="Grand relevé">grand relevé</a> effectué dans ce domaine de longueur d'onde après le relevé <a href="/w/index.php?title=TMASS&action=edit&redlink=1" class="new" title="TMASS (page inexistante)">TMASS</a>, réalisé en <a href="/wiki/1969_en_science" title="1969 en science">1969</a>. Le projet était dirigé par l'<a href="/wiki/Astronome" title="Astronome">astronome</a> <a href="/w/index.php?title=Michael_Skrutski&action=edit&redlink=1" class="new" title="Michael Skrutski (page inexistante)">Michael Skrutski</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Description">Description</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=1" title="Modifier la section : Description" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=1" title="Modifier le code source de la section : Description"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le projet 2MASS a cartographié intégralement le ciel dans les bandes <a href="/wiki/Bande_J" title="Bande J">J</a> (centrée sur <span class="nowrap">1,25 μm</span>), <a href="/wiki/Bande_H" title="Bande H">H</a> (<span class="nowrap">1,65 μm</span>) et <a href="/wiki/Bande_K_(infrarouge)" title="Bande K (infrarouge)">K<sub>S</sub></a> (<span class="nowrap">2,17 μm</span>), soit au voisinage de <span class="nowrap">2 microns</span>, d'où le nom du projet, également inspiré du surnom de l'université du Massachusetts (<i>UMass</i>). La <a href="/wiki/Magnitude_limite" title="Magnitude limite">magnitude limite</a> du relevé est voisine de 14,5 et sa résolution est de <span class="nowrap">2 <a href="/wiki/Seconde_d%27arc" class="mw-redirect" title="Seconde d'arc">secondes d'arc</a></span>. Sa sensibilité est environ 80 000 fois supérieure au <span class="need_ref" title="Ce passage nécessite des précisions supplémentaires." style="cursor:help;">relevé précédent dans ce domaine de longueur d’onde</span><sup class="need_ref_tag" style="padding-left:2px;"><a href="/wiki/Aide:Pr%C3%A9ciser_un_fait" title="Aide:Préciser un fait">[Quoi ?]</a></sup>. </p><p>Parmi les objectifs scientifiques du projet, figuraient : </p> <ul><li>la détection de <a href="/wiki/Naine_brune" title="Naine brune">naines brunes</a>, bien plus lumineuses dans les bandes J, H, K que dans le visible<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite_crochet">[</span>1<span class="cite_crochet">]</span></a></sup></li> <li>la cartographie de l'<a href="/wiki/Univers_observable" title="Univers observable">univers observable</a> dans les directions du <a href="/wiki/Plan_galactique" title="Plan galactique">plan galactique</a>, extrêmement opaque dans le domaine visible du fait de l'absorption du <a href="/wiki/Milieu_interstellaire" title="Milieu interstellaire">milieu interstellaire</a>.</li></ul> <p>Les données recueillies ont été traitées automatiquement au <span class="lang-en" lang="en"><a href="/wiki/Infrared_Processing_and_Analysis_Center" title="Infrared Processing and Analysis Center">Infrared Processing and Analysis Center</a></span> (IPAC) du <span class="lang-en" lang="en"><a href="/wiki/Jet_Propulsion_Laboratory" title="Jet Propulsion Laboratory">Jet Propulsion Laboratory</a></span>. Deux catalogues ont été élaborés, l'un recensant des sources ponctuelles (<a href="/wiki/%C3%89toile" title="Étoile">étoiles</a>, <a href="/wiki/Quasar" title="Quasar">quasars</a>), l'autre des sources étendues (<a href="/wiki/Galaxie" title="Galaxie">galaxies</a>, <a href="/wiki/N%C3%A9buleuse" title="Nébuleuse">nébuleuses</a>). Le catalogue des sources ponctuelles compte près de <span class="nowrap">470 millions</span> d'objets<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite_crochet">[</span>2<span class="cite_crochet">]</span></a></sup> (470 992 970 objets exactement), celui des sources étendues plus d'un million et demi (1 647 599 exactement). Ces deux catalogues sont désormais en libre accès pour la <a href="/wiki/Communaut%C3%A9_scientifique" title="Communauté scientifique">communauté scientifique</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=2" title="Modifier la section : Notes et références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=2" title="Modifier le code source de la section : Notes et références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small decimal" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a> </span><span class="reference-text">Par exemple, il existe un écart d'environ six <a href="/wiki/Magnitude_apparente" title="Magnitude apparente">magnitudes</a> pour un système comme <span class="nowrap"><a href="/wiki/2MASS_J07464256%2B2000321" title="2MASS J07464256+2000321">2MASS J07464256+2000321</a></span> entre sa magnitude dans la bande J et celle du <a href="/wiki/Domaine_visible" class="mw-redirect" title="Domaine visible">domaine visible</a>.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a> </span><span class="reference-text"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a href="/w/index.php?title=Roc_M._Cutri&action=edit&redlink=1" class="new" title="Roc M. Cutri (page inexistante)">Roc M. Cutri</a> <i>et al.</i>, <i>2MASS All Sky Catalog of point sources</i>, The IRSA 2MASS All-Sky Point Source Catalog, NASA/IPAC Infrared Science Archive. <a rel="nofollow" class="external text" href="http://irsa.ipac.caltech.edu/applications/Gator/">Voir en ligne</a>.</span> </li> </ol></div> </div> <div class="mw-heading mw-heading2"><h2 id="Voir_aussi">Voir aussi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=3" title="Modifier la section : Voir aussi" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=3" title="Modifier le code source de la section : Voir aussi"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Articles_connexes">Articles connexes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=4" title="Modifier la section : Articles connexes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=4" title="Modifier le code source de la section : Articles connexes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Cat%C3%A9gorie:Objet_du_catalogue_2MASS" title="Catégorie:Objet du catalogue 2MASS">catégorie « Objet du catalogue 2MASS »</a></li> <li><a href="/wiki/Digitized_Sky_Survey" title="Digitized Sky Survey">Digitized Sky Survey (DSS)</a></li> <li><a href="/wiki/Sloan_Digital_Sky_Survey" title="Sloan Digital Sky Survey">Sloan Digital Sky Survey(SDSS)</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="Liens_externes">Liens externes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&veaction=edit&section=5" title="Modifier la section : Liens externes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Two-Micron_All-Sky_Survey&action=edit&section=5" title="Modifier le code source de la section : Liens externes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="ouvrage" id="site_officiel" style="font-style: normal;"><span class="wd_p856"><a rel="nofollow" class="external text" href="http://www.ipac.caltech.edu/2mass/">Site officiel</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1454942?uselang=fr#P856" title="Voir et modifier les données sur Wikidata"><img alt="Voir et 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src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></span> : <ul><li><a rel="nofollow" class="external text" href="https://www.britannica.com/topic/Two-Micron-All-Sky-Survey"><i>Britannica</i></a></li> </ul></div></li> <li class="mw-empty-elt"></li> <li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://pegasus.phast.umass.edu/">Projet 2MASS à l'université du Massachusetts</a></li> <li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://www.ipac.caltech.edu/2mass/">Projet 2MASS au Jet Propulsion Laboratory</a></li> <li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://cdsweb.u-strasbg.fr/cgi-bin/qcat?II/246">Catalogue des sources ponctuelles de 2MASS</a>, au <a href="/wiki/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg" title="Centre de données astronomiques de Strasbourg">centre de données astronomiques de Strasbourg</a></li> <li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://wise2.ipac.caltech.edu/staff/jarrett/2mass/XSC/">Catalogue des sources étendues de 2MASS</a>, sur le site de l'IPAC</li></ul> <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 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