Integral Field Units

<!DOCTYPE html> <html lang="en"> <head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#"> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <base target="_top" /> <meta name="robots" content="index,follow" /> <meta name="author" content="information@eso.org" /> <meta name="description" content="ESO, European Organisation for Astronomical Research in the Southern Hemisphere" /> <meta name="keywords" content="ESO, eso.org, Astronomy, Astrophysics, Astronomie, Suedsternwarte, telescopes, detectors, comets, planets, stars, galaxies, nebulae, universe, NTT, VLT, VLTI, ALMA, ELT, La Silla, Paranal, Garching, Chile" /> <meta name="statvooVerification" content="f546f5bccd3fb7f8c5d8e97c6beab814" /> <link rel="alternate" href="https://www.eso.org/public/teles-instr/technology/ifu/" hreflang="x-default" /><link rel="alternate" href="https://www.eso.org/public/australia/teles-instr/technology/ifu/" hreflang="en-au" /><link rel="alternate" href="https://www.eso.org/public/unitedkingdom/teles-instr/technology/ifu/" hreflang="en-gb" /><link rel="alternate" href="https://www.eso.org/public/ireland/teles-instr/technology/ifu/" hreflang="en-ie" /><link rel="alternate" href="https://www.eso.org/public/czechrepublic/teles-instr/technology/ifu/" hreflang="cs" /><link rel="alternate" href="https://www.eso.org/public/denmark/teles-instr/technology/ifu/" hreflang="da" /><link rel="alternate" href="https://www.eso.org/public/netherlands/teles-instr/technology/ifu/" hreflang="nl" /><link rel="alternate" href="https://www.eso.org/public/belgium-nl/teles-instr/technology/ifu/" hreflang="nl-be" /><link rel="alternate" href="https://www.eso.org/public/finland/teles-instr/technology/ifu/" hreflang="fi" /><link rel="alternate" href="https://www.eso.org/public/france/teles-instr/technology/ifu/" hreflang="fr" /><link rel="alternate" href="https://www.eso.org/public/belgium-fr/teles-instr/technology/ifu/" hreflang="fr-be" /><link rel="alternate" href="https://www.eso.org/public/switzerland-fr/teles-instr/technology/ifu/" hreflang="fr-ch" /><link rel="alternate" href="https://www.eso.org/public/germany/teles-instr/technology/ifu/" hreflang="de" /><link rel="alternate" href="https://www.eso.org/public/austria/teles-instr/technology/ifu/" hreflang="de-at" /><link rel="alternate" href="https://www.eso.org/public/belgium-de/teles-instr/technology/ifu/" hreflang="de-be" /><link rel="alternate" href="https://www.eso.org/public/switzerland-de/teles-instr/technology/ifu/" hreflang="de-ch" /><link rel="alternate" href="https://www.eso.org/public/italy/teles-instr/technology/ifu/" hreflang="it" /><link rel="alternate" href="https://www.eso.org/public/switzerland-it/teles-instr/technology/ifu/" hreflang="it-ch" /><link rel="alternate" href="https://www.eso.org/public/poland/teles-instr/technology/ifu/" hreflang="pl" /><link rel="alternate" href="https://www.eso.org/public/portugal/teles-instr/technology/ifu/" hreflang="pt" /><link rel="alternate" href="https://www.eso.org/public/spain/teles-instr/technology/ifu/" hreflang="es" /><link rel="alternate" href="https://www.eso.org/public/chile/teles-instr/technology/ifu/" hreflang="es-cl" /><link rel="alternate" href="https://www.eso.org/public/sweden/teles-instr/technology/ifu/" hreflang="sv" /> <link rel="shortcut icon" href="https://www.eso.org/public/archives/favicon.ico" /> <title>Integral Field Units | ESO</title>  <style type="text/css"> @import url("https://fast.fonts.net/t/1.css?apiType=css&projectid=03892b9b-79f6-4f01-9746-af912ebf5e47"); </style> <link href="/public/archives/djp/css/main.9116bda0b9f3.css" rel="stylesheet" type="text/css" /> <link href="https://feeds.feedburner.com/EsoTopNews" rel="alternate" type="application/rss+xml" title="ESO Top News" /> <link href="https://feeds.feedburner.com/EsoAnnouncements" rel="alternate" type="application/rss+xml" title="ESO Announcements" /> <link href="https://feeds.feedburner.com/ESOcast" rel="alternate" type="application/rss+xml" title="ESOCast" /> <link href="https://recruitment.eso.org/jobs.rss" rel="alternate" type="application/rss+xml" title="Jobs@ESO" /> <link href="https://www.eso.org/public/blog/feed/" rel="alternate" type="application/rss+xml" title="ESOblog" />  <meta name="twitter:card" content="summary" /> <meta name="twitter:site" content="@ESO" /> <meta name="twitter:creator" content="@ESO" />  <script type="text/javascript"> var _paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="/mtmo/"; _paq.push(['setTrackerUrl', u+'matomo.php']); _paq.push(['setSiteId', '1']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); })(); </script>  <meta property="og:title" content="Integral Field Units" /> </head> <body> <input type='hidden' name='csrfmiddlewaretoken' value='x7WUvVQEjnYQCiECshkXWYe2HhC2yZVZ8oTHQhSdaXFgbPYre3MiC5AdqE60wS4k' /> <div id="privacy-notice" style="display: none"> <p> By continuing to use this website, you are giving consent to our use of cookies.<br> For more information on how ESO uses data and how you can disable cookies, please view <a href="/public/about-eso/privacy/"> our privacy policy</a>. </p> <button type="button" class="btn btn-primary" onclick="accept_privacy_notice()"> Accept </button> <script> // Display the privacy cookie if the cookie is not set if (!has_privacy_cookie()) { document.getElementById('privacy-notice').style.display = 'block' } function has_privacy_cookie() { return document.cookie.split(';').filter(function(item) { return item.indexOf('privacy_notice_accepted=True') >= 0 }).length > 0 } function accept_privacy_notice() { let data = { LANGUAGE_CODE: 'en' } let csrftoken = getCookie('csrftoken'); let headers = new Headers(); headers.append('Content-Type', 'application/json; charset=utf-8'); headers.append('X-CSRFToken', csrftoken); fetch('/public/accept-privacy-notice/', { method: 'post', headers: headers, credentials: 'include', body: JSON.stringify(data) }).then( document.getElementById('privacy-notice').style.display = 'none' ) } function getCookie(name) { var cookieValue = null; if (document.cookie && document.cookie !== '') { var cookies = document.cookie.split(';'); for (var i = 0; i < cookies.length; i++) { var cookie = jQuery.trim(cookies[i]); // Does this cookie string begin with the name we want? if (cookie.substring(0, name.length + 1) == (name + '=')) { cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); break; } } } return cookieValue; } </script> </div> <nav class="navbar-general-wrapper" role="navigation"> <div class="navbar-general"> <div class="minilogo"> <a href="/public/"> <div class="sprites-esologo-23-30" title="European Organisation for Astronomical Research in the Southern Hemisphere"></div> </a> </div> <div id="select-language"> <div class="flags"> <div title="Austria" class="sprites-flag_at"></div> <div title="Belgium" class="sprites-flag_be"></div> <div title="Czechia" class="sprites-flag_cz"></div> <div title="Denmark" class="sprites-flag_da"></div> <div title="Finland" class="sprites-flag_fi"></div> <div title="France" class="sprites-flag_fr"></div> <div title="Germany" class="sprites-flag_de"></div> <div title="Ireland" class="sprites-flag_ie"></div> <div title="Italy" class="sprites-flag_it"></div> <div title="Netherlands" class="sprites-flag_nl"></div> <div title="Poland" class="sprites-flag_pl"></div> <div title="Portugal" class="sprites-flag_pt"></div> <div title="Spain" class="sprites-flag_es"></div> <div title="Sweden" class="sprites-flag_sv"></div> <div title="Switzerland" class="sprites-flag_ch"></div> <div title="UK" class="sprites-flag_gb"></div> <div style="margin-left: 8px" title="Chile" class="sprites-flag_cl"></div> </div> <div class="languages"> <div class="language-button"> <span class="language-text">Select Language (en)</span> <div class="language-flag"><div title="en" class="flag sprites-flag_gb"> </div><span> (en)</span></div> <span class="caret"></span> </div> <ul class="languages-dropdown" role="menu"> <li class="language selected"><a role="menuitem" href="/public/teles-instr/technology/ifu/?lang"><div title="International English" class="flag sprites-flag_en"> </div>International English</a></li> <li class="language"><a role="menuitem" href="/public/denmark/teles-instr/technology/ifu/?lang"><div title="Dansk" class="flag sprites-flag_da"> </div>Dansk</a></li> <li class="language"><a role="menuitem" href="/public/germany/teles-instr/technology/ifu/?lang"><div title="Deutsch" class="flag sprites-flag_de"> </div>Deutsch</a></li> <li class="language"><a role="menuitem" href="/public/belgium-de/teles-instr/technology/ifu/?lang"><div title="Deutsch (Belgien)" class="flag sprites-flag_be"> </div>Deutsch (Belgien)</a></li> <li class="language"><a role="menuitem" href="/public/switzerland-de/teles-instr/technology/ifu/?lang"><div title="Deutsch (Schweiz)" class="flag sprites-flag_ch"> </div>Deutsch (Schweiz)</a></li> <li class="language"><a role="menuitem" href="/public/austria/teles-instr/technology/ifu/?lang"><div title="Deutsch (Österreich)" class="flag sprites-flag_at"> </div>Deutsch (Österreich)</a></li> <li class="language"><a role="menuitem" href="/public/australia/teles-instr/technology/ifu/?lang"><div title="English (Australia)" class="flag sprites-flag_au"> </div>English (Australia)</a></li> <li class="language"><a role="menuitem" href="/public/ireland/teles-instr/technology/ifu/?lang"><div title="English (Ireland)" class="flag sprites-flag_ie"> </div>English (Ireland)</a></li> <li class="language"><a role="menuitem" href="/public/unitedkingdom/teles-instr/technology/ifu/?lang"><div title="English (UK)" class="flag sprites-flag_gb"> </div>English (UK)</a></li> <li class="language"><a role="menuitem" href="/public/spain/teles-instr/technology/ifu/?lang"><div title="Español" class="flag sprites-flag_es"> </div>Español</a></li> <li class="language"><a role="menuitem" href="/public/chile/teles-instr/technology/ifu/?lang"><div title="Español (Chile)" class="flag sprites-flag_cl"> </div>Español (Chile)</a></li> <li class="language"><a role="menuitem" href="/public/france/teles-instr/technology/ifu/?lang"><div title="Français" class="flag sprites-flag_fr"> </div>Français</a></li> <li class="language"><a role="menuitem" href="/public/belgium-fr/teles-instr/technology/ifu/?lang"><div title="Français (Belgique)" class="flag sprites-flag_be"> </div>Français (Belgique)</a></li> <li class="language"><a role="menuitem" href="/public/switzerland-fr/teles-instr/technology/ifu/?lang"><div title="Français (Suisse)" class="flag sprites-flag_ch"> </div>Français (Suisse)</a></li> <li class="language"><a role="menuitem" href="/public/italy/teles-instr/technology/ifu/?lang"><div title="Italiano" class="flag sprites-flag_it"> </div>Italiano</a></li> <li class="language"><a role="menuitem" href="/public/switzerland-it/teles-instr/technology/ifu/?lang"><div title="Italiano (Svizzera)" class="flag sprites-flag_ch"> </div>Italiano (Svizzera)</a></li> <li class="language"><a role="menuitem" href="/public/netherlands/teles-instr/technology/ifu/?lang"><div title="Nederlands" class="flag sprites-flag_nl"> </div>Nederlands</a></li> <li class="language"><a role="menuitem" href="/public/belgium-nl/teles-instr/technology/ifu/?lang"><div title="Nederlands (België)" class="flag sprites-flag_be"> </div>Nederlands (België)</a></li> <li class="language"><a role="menuitem" href="/public/poland/teles-instr/technology/ifu/?lang"><div title="Polski" class="flag sprites-flag_pl"> </div>Polski</a></li> <li class="language"><a role="menuitem" href="/public/portugal/teles-instr/technology/ifu/?lang"><div title="Português" class="flag sprites-flag_pt"> </div>Português</a></li> <li class="language"><a role="menuitem" href="/public/finland/teles-instr/technology/ifu/?lang"><div title="Suomi" class="flag sprites-flag_fi"> </div>Suomi</a></li> <li class="language"><a role="menuitem" href="/public/sweden/teles-instr/technology/ifu/?lang"><div title="Svenska" class="flag sprites-flag_sv"> </div>Svenska</a></li> <li class="language"><a role="menuitem" href="/public/czechrepublic/teles-instr/technology/ifu/?lang"><div title="Česky" class="flag sprites-flag_cs"> </div>Česky</a></li> </ul> </div> </div> <div class="sections"> <a href="https://www.eso.org/sci.html">Science</a> <a href="/UserPortal/">User Portal</a> </div> <div class="searchbox"> <button type="button" class="btn btn-default" id="searchbox-button"> <span class="fa fa-search"></span> </button> <div id="searchbox-dropdown"> <form action="/public/search/" method="get" class="form-inline" role="search"> <div class="form-group"> <div class="input-group"> <input type="text" value="" placeholder="Search..." name="q" class="form-control"> <span class="input-group-btn"> <button class="btn btn-default" type="submit"><span class="fa fa-search"></span></button> </span> </div>   </div> </form> </div> </div> <div class="links"> <a href="/public/outreach/newsletters/esonews/">Subscribe</a> <a href="/public/about-eso/travel/">Contact</a> <a href="/public/sitemap/">Site Map</a> </div> </div> </nav> <nav class="main-menu-wrapper" role="navigation"> <div class="main-menu"> <div class="mobile-menu clearfix"> <button class="menu-trigger"><span class="fa fa-navicon"></span> Open Menu</button> </div> <ul class="level0 mainmenu-aim"> <li><a href="/public/about-eso/">About<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-2" class="submenu-aim"> <li class=""><a href="/public/about-eso/esoglance/"> ESO, the European Southern Observatory </a></li><li class=""><a href="/public/about-eso/organisation/"> Organisation </a></li><li class=""><a href="/public/about-eso/mission-vision-values-strategy/"> Mission-Vision-Values-Strategy </a></li><li class="submenu"><a href="/public/about-eso/dg-office/"> Director General <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-6" class="submenu-aim sublevel"><li class="submenu"><a href="/public/about-eso/dg-office/previous-dg/"> List of Directors General <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-7" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/dg-office/xbarcons/"> Prof. Xavier Barcons </a></li><li class=""><a href="/public/about-eso/dg-office/tdezeeuw/"> Prof. T. de Zeeuw </a></li><li class=""><a href="/public/about-eso/dg-office/ccesarsk/"> Dr. C. Cesarsky </a></li><li class=""><a href="/public/about-eso/dg-office/rgiacconi/"> Prof. R. Giacconi </a></li><li class=""><a href="/public/about-eso/dg-office/hvanderlaan/"> Prof. H. van der Laan </a></li><li class=""><a href="/public/about-eso/dg-office/lwoltjer/"> Prof. L. Woltjer </a></li><li class=""><a href="/public/about-eso/dg-office/ablaauw/"> Prof. A. Blaauw </a></li><li class=""><a href="/public/about-eso/dg-office/otto-heckmann/"> Prof. O. Heckmann </a></li></ul></li></ul></li><li class=""><a href="/public/about-eso/committees.html"> ESO's Governing Bodies </a></li><li class="submenu"><a href="/public/about-eso/memberstates/"> Member States and Partners <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-17" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/memberstates/austrianinvolvement/"> Austria </a></li><li class=""><a href="/public/about-eso/memberstates/belgianinvolvement/"> Belgium </a></li><li class=""><a href="/public/about-eso/memberstates/czechinvolvement/"> Czechia </a></li><li class=""><a href="/public/about-eso/memberstates/danishinvolvement/"> Denmark </a></li><li class=""><a href="/public/about-eso/memberstates/finnishinvolvement/"> Finland </a></li><li class=""><a href="/public/about-eso/memberstates/frenchinvolvement/"> France </a></li><li class=""><a href="/public/about-eso/memberstates/germaninvolvement/"> Germany </a></li><li class=""><a href="/public/about-eso/memberstates/irishinvolvement/"> Ireland </a></li><li class=""><a href="/public/about-eso/memberstates/italianinvolvement/"> Italy </a></li><li class=""><a href="/public/about-eso/memberstates/dutchinvolvement/"> Netherlands </a></li><li class=""><a href="/public/about-eso/memberstates/polishinvolvement/"> Poland </a></li><li class=""><a href="/public/about-eso/memberstates/portugueseinvolvement/"> Portugal </a></li><li class=""><a href="/public/about-eso/memberstates/spanishinvolvement/"> Spain </a></li><li class=""><a href="/public/about-eso/memberstates/swedishinvolvement/"> Sweden </a></li><li class=""><a href="/public/about-eso/memberstates/swissinvolvement/"> Switzerland </a></li><li class=""><a href="/public/about-eso/memberstates/britishinvolvement/"> United Kingdom </a></li><li class=""><a href="/public/about-eso/strategicpartners/australianinvolvement/"> Australia (Partner) </a></li></ul></li><li class="submenu"><a href="/public/about-eso/eso-and-chile/"> ESO & Chile <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-35" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/eso-and-chile/representation-office-chile/"> ESO Representation Office in Chile </a></li></ul></li><li class="submenu"><a href="/public/about-eso/travel/"> Travel and Contacts <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-37" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/travel/garching/"> Travel to ESO Headquarters </a></li><li class=""><a href="/public/about-eso/travel/vitacura/"> Travel to Vitacura Office </a></li><li class=""><a href="/public/about-eso/travel/guesthouse/"> Travel to Guesthouse </a></li><li class=""><a href="/public/about-eso/travel/lasilla/"> Travel to La Silla </a></li><li class=""><a href="/public/about-eso/travel/laserena/"> Travel to La Serena </a></li><li class=""><a href="/public/about-eso/travel/paranal/"> Travel to Paranal </a></li><li class=""><a href="/public/about-eso/travel/antofagasta/"> Travel to Antofagasta </a></li><li class=""><a href="/public/about-eso/travel/chajnantor/"> Travel to Chajnantor </a></li><li class=""><a href="/public/about-eso/travel/elt/"> Travel to ELT Armazones </a></li></ul></li><li class="submenu"><a href="/public/about-eso/visitors/"> Visits to ESO Sites <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-47" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/visitors/paranal/"> Weekend visits to Paranal </a></li><li class=""><a href="/public/about-eso/visitors/lasilla/"> Weekend Visits to La Silla </a></li><li class=""><a href="/public/outreach/pressmedia/mediavisits/"> Media Visits </a></li><li class=""><a href="/public/about-eso/visitors/virtual-tours/"> Virtual Visits </a></li><li class=""><a href="/public/about-eso/visitors/artists-at-eso/"> Artistic Visits </a></li></ul></li><li class=""><a href="/public/about-eso/societal-benefits/"> ESO and Society </a></li><li class=""><a href="/public/about-eso/architecture/"> Architecture at ESO </a></li><li class=""><a href="/public/about-eso/collaborations/"> Collaborations with ESO </a></li><li class=""><a href="/public/about-eso/acronyms/"> ESO Acronyms </a></li><li class=""><a href="/public/about-eso/timeline/"> Timeline </a></li><li class="submenu"><a class="no-link children" href="#"> Sustainability <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-58" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/sustainability/green/"> Environmental sustainability at ESO </a></li><li class=""><a href="/public/about-eso/sustainability/eso-un-sdgs/"> ESO and the UN's Sustainable Development Goals </a></li><li class=""><a href="/public/about-eso/sustainability/dei-at-eso/"> Diversity, Equity and Inclusion </a></li></ul></li><li class="submenu"><a href="/public/about-eso/faq/"> Frequently Asked Questions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-62" class="submenu-aim sublevel"><li class=""><a href="/public/about-eso/faq/faq-eso/"> ESO </a></li><li class=""><a href="/public/about-eso/faq/faq-vlt-paranal/"> VLT/Paranal </a></li><li class=""><a href="/public/about-eso/faq/faq-apex-alma/"> APEX/ALMA </a></li><li class=""><a href="https://elt.eso.org/about/faq/"> ELT </a></li><li class=""><a href="/public/about-eso/faq/privileges_and_immunities/"> Privileges and Immunities </a></li><li class=""><a href="/public/about-eso/faq/faq-eso-australia/"> ESO & Australia </a></li></ul></li><li class=""><a href="/public/about-eso/dark-skies-preservation/"> Dark skies preservation </a></li><li class=""><a href="/public/about-eso/privacy/"> Terms and Conditions </a></li> </ul> </div> </div> </li> <li><a href="/public/images/">Images<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-71" class="submenu-aim"> <li class=""><a href="/public/images/search/"> Advanced Search </a></li><li class="submenu"><a class="no-link children" href="#"> Categories <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-73" class="submenu-aim sublevel"><li class=""><a href="/public/images/archive/category/360pano/ "> 360 Panorama </a></li><li class=""><a href="/public/images/archive/category/alma/"> ALMA </a></li><li class=""><a href="/public/images/archive/category/apex/"> APEX </a></li><li class=""><a href="/public/images/archive/category/chile/"> Chile </a></li><li class=""><a href="/public/images/archive/category/cosmology/"> Cosmology </a></li><li class=""><a href="/public/images/archive/category/elt/"> ELT </a></li><li class=""><a href="/public/images/archive/category/eso-supernova/"> ESO Supernova </a></li><li class=""><a href="/public/images/archive/category/exoplanets/"> Exoplanets </a></li><li class=""><a href="/public/images/archive/category/fulldome/"> Fulldome </a></li><li class=""><a href="/public/images/archive/category/galaxies/"> Galaxies </a></li><li class=""><a href="/public/images/archive/category/galaxyclusters/"> Galaxy Clusters </a></li><li class=""><a href="/public/images/archive/category/illustrations/"> Illustrations </a></li><li class=""><a href="/public/images/archive/category/lasilla/"> La Silla </a></li><li class=""><a href="/public/images/archive/category/nebulae/"> Nebulae </a></li><li class=""><a href="/public/images/archive/category/paranal/"> Paranal </a></li><li class=""><a href="/public/images/archive/category/peopleandevents/"> People and Events </a></li><li class=""><a href="/public/images/archive/category/premises/"> Premises </a></li><li class=""><a href="/public/images/archive/category/blackholes/"> Quasars and Black Holes </a></li><li class=""><a href="/public/images/archive/category/solarsystem/"> Solar System </a></li><li class=""><a href="/public/images/archive/category/starclusters/"> Star Clusters </a></li><li class=""><a href="/public/images/archive/category/stars/"> Stars </a></li><li class=""><a href="/public/images/archive/category/surveytelescopes/"> Survey Telescopes </a></li></ul></li><li class=""><a href="/public/images/comparisons/"> Image Comparisons </a></li><li class=""><a href="/public/images/imageformats/"> Image Formats </a></li><li class="submenu"><a href="/public/images/potw/"> Picture of the Week <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-98" class="submenu-aim sublevel"><li class=""><a href="/public/images/potw/archive/year/2024/"> 2024 </a></li><li class=""><a href="/public/images/potw/archive/year/2023/"> 2023 </a></li><li class=""><a href="/public/images/potw/archive/year/2022/"> 2022 </a></li><li class=""><a href="/public/images/potw/archive/year/2021/"> 2021 </a></li><li class=""><a href="/public/images/potw/archive/year/2020/"> 2020 </a></li><li class=""><a href="/public/images/potw/archive/year/2019/"> 2019 </a></li><li class=""><a href="/public/images/potw/archive/year/2018/"> 2018 </a></li><li class=""><a href="/public/images/potw/archive/year/2017/"> 2017 </a></li><li class=""><a href="/public/images/potw/archive/year/2016/"> 2016 </a></li><li class=""><a href="/public/images/potw/archive/year/2015/"> 2015 </a></li><li class=""><a href="/public/images/potw/archive/year/2014/"> 2014 </a></li><li class=""><a href="/public/images/potw/archive/year/2013/"> 2013 </a></li><li class=""><a href="/public/images/potw/archive/year/2012/"> 2012 </a></li><li class=""><a href="/public/images/potw/archive/year/2011/"> 2011 </a></li><li class=""><a href="/public/images/potw/archive/year/2010/"> 2010 </a></li><li class=""><a href="/public/images/potw/archive/year/2009/"> 2009 </a></li><li class=""><a href="/public/images/potw/archive/year/2008/"> 2008 </a></li><li class=""><a href="/public/images/potw/archive/year/2007/"> 2007 </a></li></ul></li><li class="submenu"><a href="/public/images/archive/top100/"> Top 100 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-117" class="submenu-aim sublevel"><li class=""><a href="https://cdn.eso.org/images/top100-large.zip"> Large JPG Zip File (3.5 GB) </a></li><li class=""><a href="https://cdn.eso.org/images/top100-original.zip"> Original TIF Zip File (50 GB) </a></li></ul></li><li class=""><a href="/public/copyright/"> Usage of ESO Images and Videos </a></li><li class=""><a href="/public/images/archive/wallpapers/"> Wallpapers </a></li><li class=""><a href="/public/images/archive/zoomable/"> Zoomable </a></li> </ul> </div> </div> </li> <li><a href="/public/videos/">Videos<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-123" class="submenu-aim"> <li class=""><a href="/public/videos/search/"> Advanced Search </a></li><li class="submenu"><a class="no-link children" href="#"> Categories <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-125" class="submenu-aim sublevel"><li class=""><a href="/public/videos/archive/category/abouteso/"> About ESO </a></li><li class=""><a href="/public/videos/archive/category/alma/"> ALMA </a></li><li class=""><a href="/public/videos/archive/category/apex/"> APEX </a></li><li class=""><a href="/public/videos/archive/category/chasingstarlight/"> Chasing Starlight </a></li><li class=""><a href="/public/videos/archive/category/compilations/"> Compilations </a></li><li class=""><a href="/public/videos/archive/category/cosmology/"> Cosmology </a></li><li class=""><a href="/public/videos/archive/category/elt/"> ELT </a></li><li class=""><a href="/public/videos/archive/category/esocast/"> ESOcast </a></li><li class=""><a href="/public/videos/archive/category/events/"> Events </a></li><li class=""><a href="/public/videos/archive/category/exoplanets/"> Exoplanets </a></li><li class=""><a href="/public/videos/archive/category/featuremovies/"> Feature Movies </a></li><li class=""><a href="/public/videos/archive/category/fulldome/"> Fulldome </a></li><li class=""><a href="/public/videos/archive/category/galaxies/"> Galaxies </a></li><li class=""><a href="/public/videos/archive/category/galaxyclusters/"> Galaxy Clusters </a></li><li class=""><a href="/public/videos/archive/category/lasilla/"> La Silla </a></li><li class=""><a href="/public/videos/archive/category/nebulae/"> Nebulae </a></li><li class=""><a href="/public/videos/archive/category/paranal/"> Paranal </a></li><li class=""><a href="/public/videos/archive/category/premises/"> Premises </a></li><li class=""><a href="/public/videos/archive/category/blackholes/"> Quasars and Black Holes </a></li><li class=""><a href="/public/videos/archive/category/solarsystem/"> Solar System </a></li><li class=""><a href="/public/videos/archive/category/starclusters/"> Star Clusters </a></li><li class=""><a href="/public/videos/archive/category/stars/"> Stars </a></li><li class=""><a href="/public/videos/archive/category/vnr/"> Video News Releases </a></li></ul></li><li class=""><a href="/public/copyright/"> Usage of ESO Videos and Images </a></li><li class=""><a href="/public/videoformats/"> Video Formats </a></li> </ul> </div> </div> </li> <li><a href="/public/news/">News<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-151" class="submenu-aim"> <li class="submenu"><a href="/public/news/"> Press Releases <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-152" class="submenu-aim sublevel"><li class="submenu"><a class="no-link children" href="#"> 2021-2030 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-153" class="submenu-aim sublevel"><li class=""><a href="/public/news/archive/year/2024/"> 2024 </a></li><li class=""><a href="/public/news/archive/year/2023/"> 2023 </a></li><li class=""><a href="/public/news/archive/year/2022/"> 2022 </a></li><li class=""><a href="/public/news/archive/year/2021/"> 2021 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 2011–2020 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-158" class="submenu-aim sublevel"><li class=""><a href="/public/news/archive/year/2020/"> 2020 </a></li><li class=""><a href="/public/news/archive/year/2019/"> 2019 </a></li><li class=""><a href="/public/news/archive/year/2018/"> 2018 </a></li><li class=""><a href="/public/news/archive/year/2017/"> 2017 </a></li><li class=""><a href="/public/news/archive/year/2016/"> 2016 </a></li><li class=""><a href="/public/news/archive/year/2015/"> 2015 </a></li><li class=""><a href="/public/news/archive/year/2014/"> 2014 </a></li><li class=""><a href="/public/news/archive/year/2013/"> 2013 </a></li><li class=""><a href="/public/news/archive/year/2012/"> 2012 </a></li><li class=""><a href="/public/news/archive/year/2011/"> 2011 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 2001–2010 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-169" class="submenu-aim sublevel"><li class=""><a href="/public/news/archive/year/2010/"> 2010 </a></li><li class=""><a href="/public/news/archive/year/2009/"> 2009 </a></li><li class=""><a href="/public/news/archive/year/2008/"> 2008 </a></li><li class=""><a href="/public/news/archive/year/2007/"> 2007 </a></li><li class=""><a href="/public/news/archive/year/2006/"> 2006 </a></li><li class=""><a href="/public/news/archive/year/2005/"> 2005 </a></li><li class=""><a href="/public/news/archive/year/2004/"> 2004 </a></li><li class=""><a href="/public/news/archive/year/2003/"> 2003 </a></li><li class=""><a href="/public/news/archive/year/2002/"> 2002 </a></li><li class=""><a href="/public/news/archive/year/2001/"> 2001 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 1991–2000 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-180" class="submenu-aim sublevel"><li class=""><a href="/public/news/archive/year/2000/"> 2000 </a></li><li class=""><a href="/public/news/archive/year/1999/"> 1999 </a></li><li class=""><a href="/public/news/archive/year/1998/"> 1998 </a></li><li class=""><a href="/public/news/archive/year/1997/"> 1997 </a></li><li class=""><a href="/public/news/archive/year/1996/"> 1996 </a></li><li class=""><a href="/public/news/archive/year/1995/"> 1995 </a></li><li class=""><a href="/public/news/archive/year/1994/"> 1994 </a></li><li class=""><a href="/public/news/archive/year/1993/"> 1993 </a></li><li class=""><a href="/public/news/archive/year/1992/"> 1992 </a></li><li class=""><a href="/public/news/archive/year/1991/"> 1991 </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> 1985–1990 <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-191" class="submenu-aim sublevel"><li class=""><a href="/public/news/archive/year/1990/"> 1990 </a></li><li class=""><a href="/public/news/archive/year/1989/"> 1989 </a></li><li class=""><a href="/public/news/archive/year/1988/"> 1988 </a></li><li class=""><a href="/public/news/archive/year/1987/"> 1987 </a></li><li class=""><a href="/public/news/archive/year/1986/"> 1986 </a></li><li class=""><a href="/public/news/archive/year/1985/"> 1985 </a></li></ul></li></ul></li><li class="submenu"><a href="/public/announcements/"> Announcements <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-198" class="submenu-aim sublevel"><li class=""><a href="/public/announcements/archive/year/2024/"> 2024 </a></li><li class=""><a href="/public/announcements/archive/year/2023/"> 2023 </a></li><li class=""><a href="/public/announcements/archive/year/2022/"> 2022 </a></li><li class=""><a href="/public/announcements/archive/year/2021/"> 2021 </a></li><li class=""><a href="/public/announcements/archive/year/2020/"> 2020 </a></li><li class=""><a href="/public/announcements/archive/year/2019/"> 2019 </a></li><li class=""><a href="/public/announcements/archive/year/2018/"> 2018 </a></li><li class=""><a href="/public/announcements/archive/year/2017/"> 2017 </a></li><li class=""><a href="/public/announcements/archive/year/2016/"> 2016 </a></li><li class=""><a href="/public/announcements/archive/year/2015/"> 2015 </a></li><li class=""><a href="/public/announcements/archive/year/2014/"> 2014 </a></li><li class=""><a href="/public/announcements/archive/year/2013/"> 2013 </a></li><li class=""><a href="/public/announcements/archive/year/2012/"> 2012 </a></li><li class=""><a href="/public/announcements/archive/year/2011/"> 2011 </a></li><li class=""><a href="/public/announcements/archive/year/2010/"> 2010 </a></li><li class=""><a href="/public/announcements/archive/year/2009/"> 2009 </a></li></ul></li><li class=""><a href="https://www.eso.org/public/blog/"> ESOblog </a></li><li class=""><a href="/public/announcements/webupdates/"> New on eso.org </a></li><li class="submenu"><a href="/public/outreach/pressmedia/"> Press Room <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-217" class="submenu-aim sublevel"><li class=""><a href="/public/outreach/broadcast/"> Broadcast Services </a></li><li class=""><a href="/public/outreach/pressmedia/mediavisits/"> Media Visits </a></li><li class=""><a href="/public/copyright/"> Copyright Notice </a></li></ul></li><li class="submenu"><a href="/public/newsletters/"> ESO Newsletters <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-221" class="submenu-aim sublevel"><li class=""><a href="/public/newsletters/esonews/"> ESO News </a></li><li class=""><a href="/sci/publications/newsletter/"> ESO Science Newsletter </a></li><li class=""><a href="/public/outreach/newsletters/#2"> ESO Media Newsletter </a></li></ul></li><li class=""><a href="/public/news/pitch-your-research/"> Pitch your Research </a></li> </ul> </div> </div> </li> <li><a href="/public/shop/">ESOshop<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-226" class="submenu-aim"> <li class="submenu"><a href="/public/shop/category/"> Shop Products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-227" class="submenu-aim sublevel"><li class=""><a href="/public/shop/category/annualreport/"> Annual Reports </a></li><li class=""><a href="/public/shop/category/apparel/"> Apparel </a></li><li class=""><a href="/public/shop/category/book/"> Books </a></li><li class=""><a href="/public/shop/category/brochure/"> Brochures </a></li><li class=""><a href="/public/shop/category/calendar/"> Calendars </a></li><li class=""><a href="/public/shop/category/capjournal/"> CAPjournals </a></li><li class=""><a href="/public/shop/category/conferenceitem/"> Conferences </a></li><li class=""><a href="/public/shop/category/donation/"> Donations </a></li><li class=""><a href="/public/shop/category/media/"> DVDs/Bluray/CDs </a></li><li class=""><a href="/public/shop/category/educationalmaterial/"> Educational Material </a></li><li class=""><a href="/public/shop/category/supernovaactivity/"> ESO Supernova Activities </a></li><li class=""><a href="/public/shop/category/flyer/"> Flyers </a></li><li class=""><a href="/public/shop/category/handout/"> Handouts </a></li><li class=""><a href="/public/shop/category/map/"> Maps </a></li><li class=""><a href="/public/shop/category/merchandise/"> Merchandise </a></li><li class=""><a href="/public/shop/category/messenger/"> Messengers </a></li><li class=""><a href="/public/shop/category/mountedimage/"> Mounted Images </a></li><li class=""><a href="/public/shop/category/postcard/"> Postcards </a></li><li class=""><a href="/public/shop/category/printedposter/"> Posters </a></li><li class=""><a href="/public/shop/category/technicaldocument/"> Reports </a></li><li class=""><a href="/public/shop/category/sticker/"> Stickers </a></li></ul></li><li class=""><a href="/public/shop/cart/"> View shopping cart </a></li><li class=""><a href="/public/shop/checkout/"> Checkout </a></li><li class="submenu"><a href="/public/shopinfo/"> Information <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-251" class="submenu-aim sublevel"><li class=""><a href="/public/shopinfo/bulk_orders/"> Bulk Orders </a></li><li class=""><a href="/public/shopinfo/"> Purchasing Steps </a></li><li class=""><a href="/public/shopinfo/payment/"> Payment </a></li><li class=""><a href="/public/shopinfo/shipping/"> Shipping </a></li><li class=""><a href="/public/shopinfo/shopstaff/"> Staff Shopping </a></li><li class=""><a href="/public/shopinfo/terms/"> Terms & Conditions </a></li></ul></li><li class=""><a href="/public/shop/freeorder/"> Free Orders for Educators and Media </a></li> </ul> </div> </div> </li> <li class="current"><a href="/public/teles-instr/">Telescopes & Instruments<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1 current"> <ul id="submenu-aim-259" class="submenu-aim selected current"> <li class="submenu"><a href="/public/teles-instr/paranal-observatory/"> Paranal Observatory <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-260" class="submenu-aim sublevel"><li class="submenu"><a href="/public/teles-instr/paranal-observatory/vlt/"> Very Large Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-261" class="submenu-aim sublevel"><li class="submenu"><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/"> VLT Instruments <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-262" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/4lgsf/"> 4LGSF </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/cubes/"> CUBES </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/crires/"> CRIRES </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/crires+/"> CRIRES+ </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/espresso/"> ESPRESSO </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/eris/"> ERIS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/flames/"> FLAMES </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/fors/"> FORS1 and FORS2 </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/hawk-i/"> HAWK-I </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/isaac/"> ISAAC </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/kmos/"> KMOS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/mad/"> MAD </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/mavis/"> MAVIS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/moons/"> MOONS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/muse/"> MUSE </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/naco/"> NACO </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/sinfoni/"> SINFONI </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/sphere/"> SPHERE </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/uves/"> UVES </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/vimos/"> VIMOS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/vtl-test-cameras/"> VLT Test Cameras </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/visir/"> VISIR </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/x-shooter/"> X-shooter </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/paranal-observatory/vlt/vlt-names/"> VLT Unit Telescopes Names <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-286" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-names/antu/"> Antu </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-names/kueyen/"> Kueyen </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-names/melipal/"> Melipal </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-names/yepun/"> Yepun </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/paranal-observatory/vlt/vlti/"> VLT Interferometer <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-291" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/gravity+/"> GRAVITY+ </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/gravity/"> GRAVITY </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/matisse/"> MATISSE </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/naomi/"> NAOMI </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/pionier/"> PIONIER </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/amber/"> AMBER </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/midi/"> MIDI </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/vinci/"> VINCI </a></li></ul></li><li class=""><a href="/public/teles-instr/paranal-observatory/vlt/auxiliarytelescopes/"> Auxiliary Telescopes </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/paranal-observatory/surveytelescopes/"> Survey Telescopes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-301" class="submenu-aim sublevel"><li class="submenu"><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/"> VISTA <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-302" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/mirror/"> The VISTA mirror </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/camera/"> VIRCAM </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/4most/"> 4MOST </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/surveys/"> The VISTA surveys </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/consortium/"> The VISTA consortium </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/"> VST <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-308" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/mirror/"> The VST mirrors </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/camera/"> OmegaCAM </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/surveys/"> The VST surveys </a></li></ul></li></ul></li><li class=""><a href="/public/teles-instr/paranal-observatory/speculoos/"> SPECULOOS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/ngts/"> NGTS </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/ctao/"> Cherenkov Telescope Array Observatory </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/"> La Silla Observatory <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-315" class="submenu-aim sublevel"><li class="submenu"><a href="/public/teles-instr/lasilla/swedish/"> Swedish–ESO Submillimetre Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-316" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/swedish/simba/"> SIMBA </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/ntt/"> New Technology Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-318" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/ntt/efosc2/"> EFOSC2 </a></li><li class=""><a href="/public/teles-instr/lasilla/ntt/emmi/"> EMMI </a></li><li class=""><a href="/public/teles-instr/lasilla/ntt/irspec/"> IRSPEC </a></li><li class=""><a href="/public/teles-instr/lasilla/ntt/sofi/"> SOFI </a></li><li class=""><a href="/public/teles-instr/lasilla/ntt/soxs/"> SOXS </a></li><li class=""><a href="/public/teles-instr/lasilla/ntt/susi2/"> SUSI and SUSI2 </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/36/"> ESO 3.6-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-325" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/36/adonis/"> ADONIS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/caspec/"> CASPEC </a></li><li class=""><a href="/public/teles-instr/lasilla/36/irspec/"> IRSPEC </a></li><li class=""><a href="/public/teles-instr/lasilla/36/harps/"> HARPS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/mefos/"> MEFOS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/nirps/"> NIRPS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/optopus/"> OPTOPUS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/timmi2/"> TIMMI/2 </a></li><li class=""><a href="/public/teles-instr/lasilla/36/36-infrared-photometer-spectrophotometer/"> Infrared Photometer/Spectrophotometer </a></li><li class=""><a href="/public/teles-instr/lasilla/36/36-standard-photometer/"> Standard Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/36/infrared-specklegraph/"> Infrared Specklegraph </a></li><li class=""><a href="/public/teles-instr/lasilla/36/infrared-speckle-interferometer/"> Infrared Speckle Interferometer </a></li><li class=""><a href="/public/teles-instr/lasilla/36/efosc/"> EFOSC </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/mpg22/"> MPG/ESO 2.2-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-339" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/mpg22/feros/"> FEROS </a></li><li class=""><a href="/public/teles-instr/lasilla/mpg22/grond/"> GROND </a></li><li class=""><a href="/public/teles-instr/lasilla/mpg22/irac2/"> IRAC & IRAC2 </a></li><li class=""><a href="/public/teles-instr/lasilla/mpg22/pisco/"> PISCO </a></li><li class=""><a href="/public/teles-instr/lasilla/mpg22/wfi/"> WFI </a></li><li class=""><a href="/public/teles-instr/lasilla/mpg22/infrared-photometer-spectrophotometer/"> Infrared Photometer/Spectrophotometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/swiss/"> Swiss 1.2-metre Leonhard Euler Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-346" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/swiss/coralie/"> CORALIE </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/rem/"> Rapid Eye Mount telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/trappist/"> TRAnsiting Planets and PlanetesImals Small Telescope–South </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/danish154/"> Danish 1.54-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-350" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/danish154/coravel/"> CORAVEL </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/dfosc/"> DFOSC </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/ccd/"> CCD camera </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/hb-photometer/"> Hβ Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/two-channel-photometer/"> Two-Channel Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/four-channel-photometer/"> Four-Channel Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish154/six-channel-photometer/"> Six-Channel uvby-Hβ Photometer </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/tarot/"> Télescope à Action Rapide pour les Objets Transitoires </a></li><li class=""><a href="/public/teles-instr/lasilla/1mschmidt/"> ESO 1-metre Schmidt telescope </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/152metre/"> ESO 1.52-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-360" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/152metre/bandc/"> Boller and Chivens Spectrograph </a></li><li class=""><a href="/public/teles-instr/lasilla/152metre/coude/"> Coudé Spectrograph </a></li><li class=""><a href="/public/teles-instr/lasilla/152metre/echelec/"> ECHELEC </a></li><li class=""><a href="/public/teles-instr/lasilla/152metre/rv-cass-spectrograph/"> RV Cass Spectrograph </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/1metre/"> ESO 1-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-365" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/1metre/fideos/"> FIDEOS </a></li><li class=""><a href="/public/teles-instr/lasilla/1metre/infrared-photometer/"> Infrared Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/1metre/single-channel-photometer/"> Single-Channel Photometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/05metre/"> ESO 0.5-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-369" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/05metre/single-channel-photometer/"> Single-Channel Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/05metre/double-channel-photometer/"> Double-Channel Photometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/coude/"> Coudé Auxiliary Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-372" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/coude/ces/"> CES </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/marly/"> MarLy 1-metre telescope </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/09metre/"> Dutch 0.9-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-375" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/09metre/walraven/"> Walraven Photometer </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/t70/"> Swiss T70 telescope </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/bochum/"> Bochum 0.61-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-378" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/bochum/bochum-scanner/"> Bochum Scanner </a></li><li class=""><a href="/public/teles-instr/lasilla/bochum/bochum-photometer/"> Bochum Photometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/danish05/"> Danish 0.5-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-381" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-two-channel-hb-photometer/"> Two-Channel Hβ Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-four-channel-uvby-photometer/"> Four-Channel uvby Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-six-channel-uvby-hb-photometer/"> Six-Channel uvby–Hβ Photometer </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/gpo/"> Grand Prisme Objectif telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/swiss04/"> Swiss 0.4-metre telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/marseille/"> Marseille 0.36-metre telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/grb/"> GRB Monitoring System </a></li><li class=""><a href="/public/teles-instr/lasilla/mascara/"> MASCARA </a></li><li class=""><a href="/public/teles-instr/lasilla/blackgem/"> BlackGEM </a></li><li class=""><a href="/public/teles-instr/lasilla/extra/"> ExTrA </a></li><li class=""><a href="/public/teles-instr/lasilla/test-bed/"> Test-Bed Telescope </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/apex/"> APEX <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-393" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/apex/apex-2a/"> APEX–2A </a></li><li class=""><a href="/public/teles-instr/apex/artemis/"> ArTéMiS </a></li><li class=""><a href="/public/teles-instr/apex/aszca/"> ASZCa </a></li><li class=""><a href="/public/teles-instr/apex/champ-plus/"> CHAMP+ </a></li><li class=""><a href="/public/teles-instr/apex/concerto/"> CONCERTO </a></li><li class=""><a href="/public/teles-instr/apex/flash/"> FLASH </a></li><li class=""><a href="/public/teles-instr/apex/flash-plus/"> FLASH+ </a></li><li class=""><a href="/public/teles-instr/apex/laboca/"> LABOCA </a></li><li class=""><a href="/public/teles-instr/apex/mpi_11thz/"> MPI_1.1THz </a></li><li class=""><a href="/public/teles-instr/apex/p-artemis/"> P-ArTéMiS </a></li><li class=""><a href="/public/teles-instr/apex/pi230/"> PI230 </a></li><li class=""><a href="/public/teles-instr/apex/polka/"> PolKa </a></li><li class=""><a href="/public/teles-instr/apex/saboca/"> SABOCA </a></li><li class=""><a href="/public/teles-instr/apex/sepia/"> SEPIA </a></li><li class=""><a href="/public/teles-instr/apex/shefi/"> SHeFI </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/alma/"> ALMA <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-409" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/alma/antennas/"> Antennas </a></li><li class=""><a href="/public/teles-instr/alma/transporters/"> Transporters </a></li><li class=""><a href="/public/teles-instr/alma/interferometry/"> Interferometry </a></li><li class=""><a href="/public/teles-instr/alma/receiver-bands/"> Receiver Bands </a></li><li class=""><a href="/public/teles-instr/alma/residencia/"> ALMA Residencia </a></li></ul></li><li class=""><a href="/public/teles-instr/elt/"> ELT </a></li><li class="submenu current"><a href="/public/teles-instr/technology/"> Technology for Telescopes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-416" class="submenu-aim sublevel selected current current-leaf"><li class=""><a href="/public/teles-instr/technology/active_optics/"> Active Optics </a></li><li class=""><a href="/public/teles-instr/technology/adaptive_optics/"> Adaptive Optics </a></li><li class=" current current-leaf"><a href="/public/teles-instr/technology/ifu/"> Integral Field Units </a></li><li class=""><a href="/public/teles-instr/technology/interferometry/"> Interferometry </a></li><li class=""><a href="/public/teles-instr/technology/spectroscopy/"> Spectroscopy </a></li><li class=""><a href="/public/teles-instr/technology/polarimetry/"> Polarimetry </a></li></ul></li><li class=""><a href="/public/teles-instr/instruments/"> Instruments </a></li> </ul> </div> </div> </li> <li><a href="/public/science/">Discoveries<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-424" class="submenu-aim"> <li class=""><a href="/public/science/key-discoveries/"> ESO Key Astronomical Discoveries </a></li><li class=""><a href="/public/science/exoplanets/"> Exoplanets </a></li><li class=""><a href="/public/science/gravitationalwaves/"> Gravitational Wave Sources </a></li><li class="submenu"><a class="no-link children" href="#"> Black Holes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-428" class="submenu-aim sublevel"><li class=""><a href="https://www.eso.org/public/science/event-horizon/"> First image of a black hole </a></li><li class=""><a href="https://www.eso.org/public/science/EHT-MilkyWay/"> First image of the Milky Way central black hole </a></li><li class=""><a href="https://www.eso.org/public/science/gc/"> More about the black hole at the galactic centre </a></li></ul></li><li class=""><a href="/public/science/grb/"> Gamma-Ray Bursts </a></li><li class=""><a href="/public/science/archive/"> Science Archive </a></li> </ul> </div> </div> </li> <li><a href="/public/events/">Events<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-434" class="submenu-aim"> <li class=""><a href="/public/events/press-evt/"> Press Events </a></li><li class="submenu"><a href="/public/events/special-evt/"> Special Events <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-436" class="submenu-aim sublevel"><li class=""><a href="https://www.eso.org/public/events/special-evt/60years/"> ESO at 60 </a></li><li class=""><a href="/public/events/special-evt/eeltblast/"> ELT Groundbreaking </a></li><li class=""><a href="/public/events/special-evt/cafe-and-kosmos/"> Café & Kosmos in Munich </a></li><li class=""><a href="/public/events/special-evt/awesome-universe/"> Awesome Universe </a></li><li class=""><a href="/public/events/special-evt/100ha/"> 100 Hours of Astronomy </a></li><li class=""><a href="/public/events/special-evt/theeye/"> The Eye 3D </a></li><li class=""><a href="/public/events/special-evt/imax-hidden-universe/"> IMAX® 3D Film Hidden Universe </a></li><li class=""><a href="/public/outreach/bond/"> Bond at Paranal </a></li></ul></li><li class="submenu"><a href="/public/events/exhibitions/"> Exhibitions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-445" class="submenu-aim sublevel"><li class=""><a href="/public/events/exhibitions/perma_exhibitions/"> ESO Permanent Exhibitions </a></li><li class=""><a href="https://www.esof.eu/"> EuroScience Open Forum (ESOF) </a></li></ul></li><li class="submenu"><a href="/public/events/astro-evt/"> Astronomical Events <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-448" class="submenu-aim sublevel"><li class=""><a href="/public/events/astro-evt/solareclipse2019/"> Total Solar Eclipse 2019 </a></li><li class=""><a href="/public/events/astro-evt/mcnaught2007/"> The Comet McNaught 2007 </a></li><li class=""><a href="/public/events/astro-evt/deepimpact/"> Deep Impact - 04.07.2005 </a></li><li class=""><a href="https://www.eso.org/public/outreach/eduoff/vt-2004/"> The Venus Transit - 08.11.2004 </a></li><li class=""><a href="/public/events/astro-evt/leonids99/"> The Leonids - 17.11.1999 </a></li><li class=""><a href="/public/events/astro-evt/eclipse99/"> Solar Eclipse at ESO HQ - 11.08.1999 </a></li><li class=""><a href="/public/events/astro-evt/leonids98/"> The Leonids - 11.1998 </a></li><li class=""><a href="/public/events/astro-evt/pathfinder/"> Mars Pathfinder - 1997 </a></li><li class=""><a href="/public/events/astro-evt/hyakutake/"> Comet Hyakutake - 1997 </a></li><li class=""><a href="/public/events/astro-evt/sl9/"> SL-9 and Jupiter - 1994 </a></li><li class=""><a href="/public/events/astro-evt/hale-bopp/"> Comet Hale Bopp - 1994 </a></li></ul></li> </ul> </div> </div> </li> <li><a href="/public/outreach/">Outreach<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-460" class="submenu-aim"> <li class="submenu"><a href="/public/outreach/eduoff/"> Education <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-461" class="submenu-aim sublevel"><li class=""><a href="/public/products/education/"> Educational Material </a></li><li class=""><a href="https://www.scienceinschool.org/" target="_blank" rel="noopener noreferrer"> Science in School </a></li><li class=""><a href="/public/outreach/eduoff/teacherschools/"> Teacher Schools </a></li><li class="submenu"><a href="/public/outreach/eduoff/prev-programmes/"> Previous Programmes <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-465" class="submenu-aim sublevel"><li class=""><a href="https://www.eso.org/public/outreach/eduoff/prev-programmes/catch-a-star/"> Catch a Star </a></li><li class=""><a href="/public/outreach/eduoff/liu/"> Life in the Universe </a></li><li class=""><a href="/public/outreach/eduoff/pos/"> Physics On Stage </a></li></ul></li><li class=""><a href="http://kids.alma.cl/?lang=en"> ALMA Kids </a></li></ul></li><li class="submenu"><a href="/public/outreach/partnerships/"> Partnerships <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-470" class="submenu-aim sublevel"><li class=""><a href="/public/outreach/partnerships/translators/"> Volunteer Translators </a></li><li class=""><a href="/public/outreach/partnerships/eson/"> ESO Science Outreach Network </a></li><li class="submenu"><a href="/public/outreach/partnerships/chile/"> Collaborations in Chile <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-473" class="submenu-aim sublevel"><li class=""><a href="/public/outreach/partnerships/chile/2010/"> 2010 </a></li><li class=""><a href="/public/outreach/partnerships/chile/2009/"> 2009 </a></li></ul></li><li class=""><a href="/public/outreach/partnerships/organisations/"> ESO Outreach Partner Organisations </a></li><li class=""><a href="/public/outreach/partnerships/educators/"> Informal Educators </a></li><li class=""><a href="/public/outreach/partnerships/photo-ambassadors/"> ESO Photo Ambassadors </a></li><li class=""><a href="/public/outreach/partnerships/music-ambassadors/"> ESO Music Ambassadors </a></li></ul></li><li class=""><a href="https://www.eso.org/public/outreach/first-picture-of-a-black-hole/blog/"> Taking the First Picture of a Black Hole </a></li><li class=""><a href="/public/outreach/gems/"> Cosmic Gems </a></li><li class=""><a href="/public/outreach/social/"> Social Media </a></li><li class=""><a href="/public/outreach/for_planetariums/"> For Planetariums </a></li><li class=""><a href="https://www.eso.org/public/outreach/webcams/"> Webcams </a></li><li class=""><a href="/public/outreach/your_eso_pictures/"> Your ESO Pictures </a></li><li class=""><a href="/public/outreach/astroprize/"> European Astronomy Journalism Prize </a></li><li class="submenu"><a href="/public/outreach/department/"> Our Team <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-487" class="submenu-aim sublevel"><li class=""><a href="/public/outreach/department/students/"> Students and Visitors </a></li><li class=""><a href="https://supernova.eso.org/join-us/"> Join us </a></li></ul></li><li class=""><a href="https://supernova.eso.org/"> ESO Supernova </a></li><li class=""><a href="/public/outreach/art/"> Art at ESO </a></li><li class=""><a href="/public/outreach/data2dome/"> Data2Dome </a></li><li class=""><a href="https://www.eso.org/public/blog/"> ESOblog </a></li><li class=""><a href="/public/outreach/starsateso/"> Stars@ESO </a></li><li class=""><a href="/public/outreach/ai-disclaimer/"> AI Disclaimer </a></li> </ul> </div> </div> </li> <li><a href="/public/products/">Products<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-496" class="submenu-aim"> <li class="submenu"><a class="no-link children" href="#"> Audiovisual and multimedia <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-497" class="submenu-aim sublevel"><li class=""><a href="/public/products/models3d/"> 3D models </a></li><li class=""><a href="/public/products/applications/"> Apps </a></li><li class=""><a href="/public/products/media/"> DVDs and CDs </a></li><li class=""><a href="/public/products/imaxfilms/"> IMAX movies </a></li><li class=""><a href="/public/products/minisites/"> Mini-sites </a></li><li class=""><a href="/public/products/music/"> Music </a></li><li class=""><a href="/public/products/planetariumshows/"> Planetarium shows </a></li><li class=""><a href="/public/products/presentations/"> Presentations </a></li><li class=""><a href="/public/products/soundscapes/"> Soundscapes </a></li><li class=""><a href="https://www.eso.org/public/products/virtualbackgrounds/"> Virtual Backgrounds </a></li><li class=""><a href="/public/products/virtualtours/"> Virtual Tours </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Periodicals <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-509" class="submenu-aim sublevel"><li class=""><a href="/public/products/messengers/"> Messenger </a></li><li class=""><a href="/public/products/capjournals/"> CAPjournal </a></li><li class=""><a href="/public/products/schools/"> Science in School </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Print products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-513" class="submenu-aim sublevel"><li class=""><a href="/public/products/annualreports/"> Annual Reports </a></li><li class=""><a href="/public/products/books/"> Books </a></li><li class=""><a href="/public/products/brochures/"> Brochures </a></li><li class=""><a href="/public/products/bulletins/"> Bulletins </a></li><li class=""><a href="/public/products/calendars/"> Calendars </a></li><li class=""><a href="/public/products/conf_posters/"> Conference posters </a></li><li class=""><a href="/public/products/flyers/"> Flyers </a></li><li class=""><a href="/public/products/handouts/"> Handouts </a></li><li class=""><a href="/public/products/maps/"> Maps </a></li><li class=""><a href="/public/products/presskits/"> Press kits </a></li><li class=""><a href="/public/products/reports/"> Reports </a></li><li class=""><a href="/public/products/postcards/"> Postcards </a></li><li class=""><a href="/public/products/stickers/"> Stickers </a></li><li class=""><a href="/public/products/print_posters/"> Printed posters </a></li><li class=""><a href="/public/products/papermodels/"> Paper models </a></li></ul></li><li class="submenu"><a href="/public/products/merchandise/"> Merchandise <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-529" class="submenu-aim sublevel"><li class=""><a href="/public/products/merchandise/"> Merchandise </a></li><li class=""><a href="/public/products/apparel/"> Apparel </a></li><li class=""><a href="/public/products/mountedimages/"> Mounted images </a></li><li class=""><a href="/public/products/stationery/"> Stationery </a></li></ul></li><li class="submenu"><a class="no-link children" href="#"> Electronic products <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-534" class="submenu-aim sublevel"><li class=""><a href="/public/products/electroniccards/"> Electronic cards </a></li><li class=""><a href="/public/products/elec_posters/"> Electronic posters </a></li><li class=""><a href="/public/products/epublications/"> ePublications </a></li><li class=""><a href="https://www.eso.org/public/products/virtualbackgrounds/"> Virtual Backgrounds </a></li></ul></li><li class=""><a href="/public/products/education/"> Educational material </a></li><li class=""><a href="/public/products/exhibitions/"> Exhibition material </a></li><li class=""><a href="/public/products/logos/"> Logos </a></li><li class=""><a href="/public/shop/"> Order in ESOshop </a></li> </ul> </div> </div> </li> <li><a href="/public/industry/">Business@ESO<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-543" class="submenu-aim"> <li class=""><a href="/public/industry/cp.html"> Procurement at ESO </a></li><li class=""><a href="https://www.eso.org/public/industry/events/"> Industry Events </a></li><li class="submenu"><a href="/public/industry/techtrans/"> Technology Transfer <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-546" class="submenu-aim sublevel"><li class=""><a href="/public/industry/techtrans/technology-developed-by-industry-or-institutes/"> Technology Developed by Industries </a></li><li class=""><a href="/public/industry/techtrans/develeso/"> Novel technologies by ESO </a></li><li class=""><a href="/public/industry/techtrans/developments/"> ESO know-how </a></li></ul></li><li class="submenu"><a href="/public/industry/projects/"> Future Projects <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-550" class="submenu-aim sublevel"><li class=""><a href="/public/industry/projects/elt/"> Working with the ELT </a></li></ul></li><li class="submenu"><a href="/public/industry/safety.html"> Safety <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-552" class="submenu-aim sublevel"><li class=""><a href="/public/industry/safety/emergency.html"> Emergency & Evacuation </a></li><li class=""><a href="/public/industry/safety/traffic.html"> Traffic & Parking at ESO </a></li><li class=""><a href="/public/industry/safety/contractors.html"> Contractors at ESO </a></li></ul></li><li class=""><a href="/public/industry/contact/"> Contact Information </a></li> </ul> </div> </div> </li> <li><a href="https://recruitment.eso.org/">Career Opportunities<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-557" class="submenu-aim"> <li class=""><a href="https://recruitment.eso.org/"> Recruitment </a></li><li class="submenu"><a href="/public/jobs/conditions/"> Employment Conditions <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-559" class="submenu-aim sublevel"><li class=""><a href="/public/jobs/conditions/intstaff/"> International Staff Members </a></li><li class=""><a href="/public/jobs/conditions/localstaff/"> Local Staff Members (Spanish / English) </a></li><li class=""><a href="/public/jobs/conditions/fellows/"> Fellows </a></li><li class=""><a href="/public/jobs/conditions/students/"> Students </a></li><li class=""><a href="/public/jobs/conditions/paidassoc/"> Paid Associates </a></li></ul></li><li class=""><a href="/public/jobs/working-at-eso/"> Working at ESO </a></li><li class=""><a href="/public/jobs/other-information/"> Other Information </a></li><li class=""><a href="/public/jobs/how_to_use/"> How to use this site </a></li> </ul> </div> </div> </li> </ul> </div> </nav> <div id="content" class=""> <div id="eso-side-logo"> <a href="/public/"> <div data-spy="affix" class="affix"> <div class="sprites-esologo"></div> <span>European<br>Southern<br>Observatory</span> </div> </a> </div> <div class="container " id="body"> <div class="row no-page"> <div class="col-md-12"> </div> </div> <div class="row page"> <div class="col-md-12 one-column"> <div id="edit-info-block"> <div id="page-edit-success" class="alert alert-success alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Page saved successfully </div> <div id="page-edit-failure" class="alert alert-danger alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Couldn't save page :( Please try again. </div> </div> <div class='page-content'> <div id="editable-content"> <h1>Integral Field Units</h1> <h2>How to obtain a 3D view of a whole galaxy in one shot</h2> <p>Think of a fly. Have you ever tried to catch one? You’d better be fast, because, like most insects, flies can detect movements 360° around them. The secret lies in their <a href="http://en.wikipedia.org/wiki/Eye#Compound_eyes">compound eyes</a>, which are made up of a large number of tiny photoreceptors (called <a href="http://en.wikipedia.org/wiki/Ommatidium">ommatidia</a>). These work together to give one, very wide mosaic view. Ants can have anything from a few ommatidia to a thousand, flies and bees have a few thousand, while butterflies and dragonflies have a few tens of thousands. The larger the number of ommatidia, the wider the insect’s field of view, and the sharper its vision.</p> <p>Using a similar principle, but with a completely different purpose, scientists have developed an instrument called the integral field unit (IFU). In an IFU the field of view is divided into many cells or segments to obtain a comprehensive overview of the whole. IFUs are widely used in <a href="http://en.wikipedia.org/wiki/Earth_remote_sensing">Earth remote sensing</a>, and more specifically in weather forecasting, and in the monitoring of natural disasters and climate change.</p> <div style="margin-top: 30px; margin-bottom: 30px; text-align: center;"> <a href="http://www.albertoghizzipanizza.com/wp/?page_id=155"><img src="/public/archives/static/teles-instr/ifu/fly.jpg" alt="Close-up of a fly, showing the composite eyes in detail" style="max-height: 400px;"></a><div><small><em>Close-up of a fly, showing the composite eyes in detail. The water drops act as lenses, making the facets clearly distinguishable. Each of these facets is the surface of an <a href="http://en.wikipedia.org/wiki/Ommatidium">ommatidium</a>. This configuration of compound eyes allows tiny living beings like insects to have large visual detectors (relative to their body surface area), which provide them with a very wide field of view. Credit: Alberto Ghizzi Panizza</em></small></div> </div> <p>IFUs are used in astronomy to study extended objects, such as nebulae, galaxies or a crowded cluster of stars or galaxies in one shot, using a technique known as integral field spectroscopy. In this method, the signal from each cell or pixel of the field is fed into a spectrograph, which then generates a spectrum for each individual pixel. All the resulting spectra are arranged into a datacube (see Figure 1) which contains the entire 2D field of view plus the third dimension drawn from the spectrograph, which splits the light into its different colours or wavelengths (see Figure 2). Astronomers can use the wealth of information from integral field spectrographs to measure, for example, the motion of the gas in a distant galaxy (see <a href="/public/news/eso1437/">eso1437</a>) or the distances to the different galaxies found in a field of view (see <a href="/public/news/eso1507/">eso1507</a>).</p> <div class="row" style="margin-top: 30px; margin-bottom: 9px;"> <div class="col-md-6 col-sm-12 col-xs-12" style="text-align: center;"> <a href="/public/images/eso1407a/"><img src="/public/archives/images/thumb300y/eso1407a.jpg" alt="MUSE views the strange galaxy NGC 4650A" style="max-height: 233px;"></a> <div><small><em>Figure 1. MUSE views the strange galaxy NGC 4650A.<br> Credit: ESO/MUSE consortium/R. Bacon/L. Calçada</em></small></div> </div> <div class="col-md-6 col-sm-12 col-xs-12" style="text-align: center;"> <a href="/public/images/eso1407c/"><img src="/public/archives/images/thumb300y/eso1407c.jpg" alt="MUSE colour-coded image of NGC 4650A"></a><div><small><em>Figure 2. MUSE colour-coded image of NGC 4650A.<br> Credit: ESO/MUSE consortium/R. Bacon</em></small></div> </div> </div> <p>Different types of IFUs use different techniques to divide the field of view. The three main ones applied in astronomy are:</p> <ol><li>A microlens array (very similar to the insects’ composite eyes).</li><li>A fibre bundle, which can be used alone or in combination with the microlens array (see Figure 3).</li><li>An image slicer (see Figure 4).</li></ol> <p>The first idea for an IFU came from G. Courtes in 1982. It had its first practical application in astronomy with the instrument TIGER, which saw its first light in 1987 on the 3.6-metre <a href="http://www.cfht.hawaii.edu/">Canada-France-Hawaii Telescope (CFHT)</a> on Mauna Kea, Hawaii. TIGERS’s IFU is a lenslet array.</p> <div class="row" style="margin-top: 20px; margin-bottom: 9px;"> <div class="col-md-6 col-sm-12 col-xs-12" style="text-align: center;"> <a href="/public/images/eso0203c/"><img src="/public/archives/images/thumb300y/eso0203c.jpg" alt="An illustration of how the IFUs function"></a><div><small><em>Figure 3. An illustration of how the IFUs function.<br> Credit: ESO</em></small></div> </div> <div class="col-md-6 col-sm-12 col-xs-12" style="text-align: center;"> <a href="/public/images/eso0426i/"><img src="/public/archives/images/thumb300y/eso0426i.jpg" alt="The Principle of Integral Field Spectroscopy (IFS)"></a><div> <small><em>Figure 4. The Principle of Integral Field Spectroscopy (IFS)<br> Credit: ESO</em></small></div> </div> </div> <p>At ESO, the first dedicated integral field spectrograph was <a href="/public/teles-instr/vlt/vlt-instr/sinfoni/">SINFONI</a>, which saw its first light at the <a href="/public/teles-instr/paranal/">Very Large Telescope (VLT)</a> in 2004. <a href="/public/teles-instr/vlt/vlt-instr/sinfoni/">SINFONI</a> works with an image slicer, on the same principle as the more recent <a href="/public/teles-instr/vlt/vlt-instr/muse/">MUSE</a> instrument, which has a giant IFU. The multi-object spectrograph <a href="/public/teles-instr/vlt/vlt-instr/flames/">FLAMES</a> also has two integral field units, while the second generation infrared spectrograph <a href="/public/teles-instr/vlt/vlt-instr/kmos/">KMOS</a> has 24 small IFUs, each installed in a deployable arm. <a href="/public/teles-instr/vlt/vlt-instr/vimos/">VIMOS</a> also has a fairly wide IFU, which combines microlenses and a fibre bundle. All these instruments have different characteristics — they are sensitive to different wavelengths, they have different fields of view, and different spectral resolutions — which make them suitable for observing different types of objects and solve different astronomical questions.</p> <p>Integral field spectrographs are becoming more and more sophisticated, with bigger detectors able to provide a sharper and deeper 3D understanding of the cosmos. Inkeeping with the insect analogy, IFUs are evolving from ants into dragonflies.</p> <h3>Science Highlights</h3> <ul><li>See <a href="/public/teles-instr/vlt/vlt-instr/flames/">FLAMES</a> science highlights.</li><li>See <a href="/public/teles-instr/vlt/vlt-instr/vimos/">VIMOS</a> science highlights.</li><li>See <a href="/public/teles-instr/vlt/vlt-instr/sinfoni/">SINFONI</a> science highlights.</li><li>See <a href="/public/teles-instr/vlt/vlt-instr/muse/">MUSE</a> science highlights.</li><li>See <a href="/public/teles-instr/vlt/vlt-instr/kmos/">KMOS</a> science highlights.</li></ul> <h3>Additional images</h3> <ul><li><a href="/public/images/eso0203d/">Mechanical Design of an IFU</a></li><li><a href="/public/images/ann1012b/">MUSE image slicer</a></li></ul> </div> </div> </div> </div> </div>  <div class="row footernote"> <div class="col-xs-12 col-md-3"> <a href="mailto:information@eso.org">Send us your comments!</a> </div> <div class="col-xs-12 col-md-3"> <a href="/public/outreach/newsletters/esonews/">Subscribe to receive news from ESO in your language</a> </div> <div class="col-xs-12 col-md-3"> <a href="https://www.cdn77.com">Accelerated by CDN77</a> </div> <div class="col-xs-12 col-md-3"> <a href="/public/about-eso/privacy/">Terms & Conditions</a> </div> </div> <link href="/public/archives/djp/css/extras.d3e54451ebbb.css" rel="stylesheet" type="text/css" /> <script type="text/javascript">var MEDIA_URL = "/public/archives/"</script> <script type="text/javascript" src="/public/archives/djp/js/main.04a7335af5a0.js" charset="utf-8"></script> </div>  <div id="social-share" class="hidden-print"> <div class="link facebook" data-toggle="tooltip" data-placement="right" title="Share on Facebook"> <a href="https://www.facebook.com/sharer/sharer.php?u=https://www.eso.org/public/teles-instr/technology/ifu/" target="_blank" rel="noopener noreferrer"><i class="fa-brands fa-facebook-f" aria-hidden="true"></i></a> </div> <div class="link twitter" data-toggle="tooltip" data-placement="right" title="Share on X/Twitter"> <a href="https://twitter.com/intent/tweet?url=https://www.eso.org/public/teles-instr/technology/ifu/&text=Integral Field Units&via=ESO" target="_blank" rel="noopener noreferrer"><i class="fa-brands fa-x-twitter"></i></i></a> </div> <div class="link pinterest" data-toggle="tooltip" data-placement="right" title="Share on Pinterest"> <a href="https://pinterest.com/pin/create/button/?url=https://www.eso.org/public/teles-instr/technology/ifu/&media=&description=Integral Field Units" target="_blank" rel="noopener noreferrer"><i class="fa-brands fa-pinterest-p" aria-hidden="true"></i></a> </div> <div class="link print" data-toggle="tooltip" data-placement="right" title="Print"> <a href="javascript:window.print()" target="_blank" rel="noopener noreferrer"><i class="fa fa-print" aria-hidden="true"></i></a> </div> <div class="link email" data-toggle="tooltip" data-placement="right" title="Share by email"> <a href="mailto:%20?subject=ESO — Integral Field Units&body=https://www.eso.org/public/teles-instr/technology/ifu/" target="_blank" rel="noopener noreferrer"><i class="fa-regular fa-envelope" aria-hidden="true"></i></a> </div> </div> <script> $('[data-toggle="tooltip"]').tooltip(); </script> <input type='hidden' name='csrfmiddlewaretoken' value='x7WUvVQEjnYQCiECshkXWYe2HhC2yZVZ8oTHQhSdaXFgbPYre3MiC5AdqE60wS4k' /> </body> </html>

CINXE.COM

Integral Field Units | ESO