{"id":371737,"date":"2026-02-19T01:00:27","date_gmt":"2026-02-18T15:00:27","guid":{"rendered":"https:\/\/science.nasa.gov\/missions\/hubble\/nasas-hubble-identifies-one-of-darkest-known-galaxies\/"},"modified":"2026-02-19T01:00:27","modified_gmt":"2026-02-18T15:00:27","slug":"nasas-hubble-identifies-one-of-darkest-known-galaxies","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=371737","title":{"rendered":"NASA\u2019s Hubble Identifies One of Darkest Known Galaxies"},"content":{"rendered":"<div id=\"\" class=\" hds-module hds-module-full alignfull wp-block-nasa-blocks-secondary-navigation\">\n<div class=\"hds-secondary-navigation-wrapper z-top width-100 padding-0\">\n<div id=\"\" class=\"hds-secondary-navigation width-full border-bottom-1px text-center hds-color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-hdsnav\"><button type=\"button\" class=\"hds-secondary-nav-mobile-button display-flex tablet:display-flex desktop:display-none width-full flex-align-center bg-carbon-90 border-color-carbon-80 color-spacesuit-white\" aria-expanded=\"false\" aria-controls=\"hds-secondary-nav-track\"><span>Explore Hubble<\/span><svg width=\"16\" height=\"16\" alt=\"\" enable-background=\"new 0 0 400 400\" viewBox=\"0 0 400 400\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m4.2 122.2 195.1 195.1 196.5-196.6-37.9-38-157.8 157.8-156.8-156.8z\" \/><\/svg><\/button><\/p>\n<div class=\"hds-secondary-nav-track grid-container grid-container-extrawide padding-0 tablet:padding-x-3 desktop:padding-x-2 \">\n<div class=\"hds-secondary-navigation-menu-items\">\n<nav>\n<ul class=\"usa-nav__primary usa-accordion flex-justify-center margin-0\">\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/mission\/hubble\/\" rel=\"noopener\">Hubble Home<\/a><\/li>\n<li class=\"usa-nav__primary-item\"><button type=\"button\" class=\"usa-accordion__button usa-nav__link\" aria-expanded=\"false\" 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width-full maxw-full\">\n<p class=\"label carbon-60 margin-0 margin-bottom-3 padding-0\">3 min read<\/p>\n<h1 class=\"display-48 margin-bottom-2\">NASA\u2019s Hubble Identifies One of Darkest Known Galaxies<\/h1>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-wide\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=3219&#038;h=1330&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"3219\" height=\"1330\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=3219&#038;h=1330&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"At left, a field of space with a dozen white foreground stars and a number of small, yellow background galaxies. An unremarkable area at center is outlined with a dashed red circle surrounded by a white box. Lines extend from the box to a pullout at right containing faint, grainy white light surrounded by a red circle labeled u201cCandidate dark galaxy u2013 diffuse emission.u201d Four white dots are circled in blue and labeled globular clusters.\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"eager\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=3219&#038;h=1330&#038;fit=crop&#038;crop=faces%2Cfocalpoint 3219w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=300&#038;h=124&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=768&#038;h=317&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1024&#038;h=423&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1536&#038;h=635&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=2048&#038;h=846&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=400&#038;h=165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=600&#038;h=248&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=900&#038;h=372&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1200&#038;h=496&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=2000&#038;h=826&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 3219px) 100vw, 3219px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">The low-surface-brightness galaxy CDG-2, within the dashed red circle at right, is dominated by dark matter and contains only a sparse scattering of stars. The full image from NASA\u2019s Hubble Space Telescope is at left.<\/div>\n<div class=\"hds-credits\">NASA, ESA, Dayi Li (UToronto); Image Processing: Joseph DePasquale (STScI)<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p>In the vast tapestry of the universe, most galaxies shine brightly across cosmic time and space. Yet a rare class of galaxies remains nearly invisible \u2014 low-surface-brightness galaxies dominated by dark matter and containing only a sparse scattering of faint stars.<\/p>\n<p>One such elusive object, dubbed CDG-2, may be among the most heavily dark matter-dominated galaxies ever discovered. (Dark matter is an invisible form of matter that does not reflect, emit, or absorb light.) The science paper detailing this finding was published in <a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/2041-8213\/adddab\/meta\" rel=\"noopener\">The Astrophysical Journal Letters<\/a>.<\/p>\n<p>Detecting such faint galaxies is extraordinarily difficult. Using advanced statistical techniques, David Li of the University of Toronto, Canada, and his team identified 10 previously confirmed low-surface-brightness galaxies and two additional dark galaxy candidates by searching for tight groupings of globular clusters \u2014 compact, spherical star groups typically found orbiting normal galaxies. These clusters can signal the presence of a faint, hidden stellar population.<\/p>\n<p>To confirm one of the dark galaxy candidates, astronomers employed a trio of observatories: NASA\u2019s <a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/\" rel=\"noopener\">Hubble Space Telescope<\/a>, ESA\u2019s (European Space Agency) <a href=\"https:\/\/www.esa.int\/Science_Exploration\/Space_Science\/Euclid\"  rel=\"noreferrer noopener nofollow\">Euclid<\/a> space observatory, and the ground-based <a href=\"https:\/\/subarutelescope.org\/en\/\" rel=\"noopener\">Subaru Telescope<\/a> in Hawaii. Hubble\u2019s high-resolution imaging revealed a close collection of four globular clusters in the Perseus galaxy cluster, 300 million light-years away. Follow-up studies using Hubble, Euclid, and Subaru data then revealed a faint, diffuse glow surrounding the star clusters \u2014 strong evidence of an underlying galaxy.<\/p>\n<p>\u201cThis is the first galaxy detected solely through its globular cluster population,\u201d said Li. \u201cUnder conservative assumptions, the four clusters represent the entire globular cluster population of CDG-2.\u201d<\/p>\n<figure class=\"wp-block-embed alignwide is-type-video is-provider-youtube wp-block-embed-youtube\">\n<div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\"Dark Galaxy\" Identified by Hubble\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/EnzPNWDlSeM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">NASA\u2019s Goddard Space Flight Center; Lead Producer: Paul Morris<\/figcaption><\/figure>\n<p>Preliminary analysis suggests CDG-2 has the luminosity of roughly 6 million Sun-like stars, with the globular clusters accounting for 16% of its visible content. Remarkably, 99% of its mass, which includes both visible matter and dark matter, appears to be dark matter. Much of its normal matter to enable star formation \u2014 primarily hydrogen gas \u2014 was likely stripped away by gravitational interactions with other galaxies inside the Perseus cluster.<\/p>\n<p>Globular clusters possess immense stellar density and are gravitationally tightly bound. This makes the clusters more resistant to gravitational tidal disruption, and therefore reliable tracers of such ghostly galaxies.<\/p>\n<p>As sky surveys expand with missions like Euclid, NASA\u2019s upcoming <a href=\"https:\/\/science.nasa.gov\/mission\/roman-space-telescope\/\" rel=\"noopener\">Nancy Grace Roman Space Telescope<\/a>, and the <a href=\"https:\/\/rubinobservatory.org\/\"  rel=\"noreferrer noopener nofollow\">Vera C. Rubin Observatory<\/a>, astronomers are increasingly turning to machine learning and statistical methods to sift through vast datasets.<\/p>\n<p><em>The Hubble Space Telescope has been operating for more than three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA\u2019s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.<\/em><\/p>\n<div id=\"\" class=\"hds-social-media hds-social-media--horizontal grid-container grid-container-block nasa-gb-align-center margin-y-0 padding-y-5 padding-x-3 desktop:padding-x-0 font-weight-bold hds-module aligncenter wp-block-nasa-blocks-social-media-links\">\n<div class=\"display-flex flex-align-center padding-y-1\" id=\"social-facebook\">\n<div class=\"circle-4 minw-4 display-flex flex-align-center flex-justify-center\" style=\"background-color: #4267B2;\">\n\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" aria-labelledby=\"facebookIconTitle\"><title id=\"facebookIconTitle\">Facebook logo<\/title><path d=\"M9 8h-3v4h3v12h5v-12h3.642l.358-4h-4v-1.667c0-.955.192-1.333 1.115-1.333h2.885v-5h-3.808c-3.596 0-5.192 1.583-5.192 4.615v3.385z\"\/><\/svg>\t\t\t<\/div>\n<div class=\"hds-social-media-items padding-left-2\">\n\t\t\t\t<a  class=\"margin-right-2\" href=\"https:\/\/facebook.com\/NASAHubble\" aria-label=\"Go to @NASAHubble on facebook\" rel=\"noopener\">@NASAHubble<\/a>\t\t\t<\/div>\n<\/p>\n<\/div>\n<div class=\"display-flex flex-align-center padding-y-1\" id=\"social-twitter\">\n<div class=\"circle-4 minw-4 display-flex flex-align-center flex-justify-center\" style=\"background-color: #1DA1F2;\">\n\t\t\t\t<svg width=\"1200\" height=\"1227\" viewBox=\"0 0 1200 1227\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M714.163 519.284L1160.89 0H1055.03L667.137 450.887L357.328 0H0L468.492 681.821L0 1226.37H105.866L515.491 750.218L842.672 1226.37H1200L714.137 519.284H714.163ZM569.165 687.828L521.697 619.934L144.011 79.6944H306.615L611.412 515.685L658.88 583.579L1055.08 1150.3H892.476L569.165 687.854V687.828Z\" fill=\"white\"\/><\/svg>\t\t\t<\/div>\n<div class=\"hds-social-media-items padding-left-2\">\n\t\t\t\t<a  class=\"margin-right-2\" href=\"https:\/\/x.com\/NASAHubble\" aria-label=\"Go to @NASAHubble on twitter\">@NASAHubble<\/a>\t\t\t<\/div>\n<\/p>\n<\/div>\n<div class=\"display-flex flex-align-center padding-y-1\" id=\"social-instagram\">\n<div class=\"circle-4 minw-4 display-flex flex-align-center flex-justify-center\" style=\"background-color: #833AB4;\">\n\t\t\t\t<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" width=\"169.063px\" height=\"169.063px\" viewBox=\"0 0 169.063 169.063\" style=\"enable-background:new 0 0 169.063 169.063;\" xml:space=\"preserve\" aria-labelledby=\"instagramIconTitle\"><title id=\"instagramIconTitle\">Instagram logo<\/title><g> <path d=\"M122.406,0H46.654C20.929,0,0,20.93,0,46.655v75.752c0,25.726,20.929,46.655,46.654,46.655h75.752 c25.727,0,46.656-20.93,46.656-46.655V46.655C169.063,20.93,148.133,0,122.406,0z M154.063,122.407 c0,17.455-14.201,31.655-31.656,31.655H46.654C29.2,154.063,15,139.862,15,122.407V46.655C15,29.201,29.2,15,46.654,15h75.752 c17.455,0,31.656,14.201,31.656,31.655V122.407z\"\/> <path d=\"M84.531,40.97c-24.021,0-43.563,19.542-43.563,43.563c0,24.02,19.542,43.561,43.563,43.561s43.563-19.541,43.563-43.561 C128.094,60.512,108.552,40.97,84.531,40.97z M84.531,113.093c-15.749,0-28.563-12.812-28.563-28.561 c0-15.75,12.813-28.563,28.563-28.563s28.563,12.813,28.563,28.563C113.094,100.281,100.28,113.093,84.531,113.093z\"\/> <path d=\"M129.921,28.251c-2.89,0-5.729,1.17-7.77,3.22c-2.051,2.04-3.23,4.88-3.23,7.78c0,2.891,1.18,5.73,3.23,7.78 c2.04,2.04,4.88,3.22,7.77,3.22c2.9,0,5.73-1.18,7.78-3.22c2.05-2.05,3.22-4.89,3.22-7.78c0-2.9-1.17-5.74-3.22-7.78 C135.661,29.421,132.821,28.251,129.921,28.251z\"\/><\/g><\/svg>\t\t\t<\/div>\n<div class=\"hds-social-media-items padding-left-2\">\n\t\t\t\t<a  class=\"margin-right-2\" href=\"https:\/\/instagram.com\/NASAHubble\" aria-label=\"Go to @NASAHubble on instagram\" rel=\"noopener\">@NASAHubble<\/a>\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<div id=\"\" class=\"hds-featured-link-list bg-carbon-05 padding-x-2 tablet:padding-x-3 desktop:padding-x-4 padding-y-5 desktop:padding-y-6 hds-module hds-module-full alignfull wp-block-nasa-blocks-featured-link-list\">\n<div class=\"grid-container grid-container-block padding-0\">\n<div class=\"margin-bottom-4\">\n<h2 class=\"heading-22\">\n\t\t\t\tRelated Images &#038; Videos\t\t\t<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"3219\" height=\"1330\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=3219&#038;h=1330&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"At left, a field of space with a dozen white foreground stars and a number of small, yellow background galaxies. An unremarkable area at center is outlined with a dashed red circle surrounded by a white box. Lines extend from the box to a pullout at right containing faint, grainy white light surrounded by a red circle labeled u201cCandidate dark galaxy - diffuse emission.u201d Four white dots are circled in blue and labeled globular clusters.\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=3219&#038;h=1330&#038;fit=crop&#038;crop=faces%2Cfocalpoint 3219w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=300&#038;h=124&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=768&#038;h=317&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1024&#038;h=423&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1536&#038;h=635&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=2048&#038;h=846&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=400&#038;h=165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=600&#038;h=248&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=900&#038;h=372&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=1200&#038;h=496&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PSFCSX5NBNBT6778SKHZ2D.jpg?w=2000&#038;h=826&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 3219px) 100vw, 3219px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">Dark Galaxy CDG-2 Near Perseus Cluster<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">The low-surface-brightness galaxy CDG-2, within the dashed red circle at right, is dominated by dark matter and contains only a sparse scattering of stars. <\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/asset\/hubble\/dark-galaxy-cdg-2-near-perseus-cluster\/\"  aria-label=\"Dark Galaxy CDG-2 Near Perseus Cluster\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=1920&#038;h=1080&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"The phrase \" 'Dark Galaxy' Identified by Hubble\" appears in large white letters.  An outline of the NASA Meatball logo in white appears in the upper left corner. The background is black with a smattering of stars and a few distant galaxies.\" style=\"transform: scale(1); transform-origin: 49% 78%; object-position: 49% 78%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=1920&#038;h=1080&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1920w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=300&#038;h=169&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=768&#038;h=432&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=1024&#038;h=576&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=1536&#038;h=864&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=400&#038;h=225&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=600&#038;h=338&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=900&#038;h=506&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/14924_DARK_WIDE_THUMB.jpg?w=1200&#038;h=675&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\"><strong>\u201cDark Galaxy\u201d Identified by Hubble<\/strong> (Video)<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">An elusive object, dubbed CDG-2, may be among the most heavily dark matter-dominated galaxies ever discovered.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/svs.gsfc.nasa.gov\/14924\"  aria-label=\"\" class=\"link-external-true\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"3219\" height=\"1330\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=3219&#038;h=1330&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Image labeled u201cCDG 2 near Perseus Cluster, HST ACS WFCu201d. At left is a field of space with an area outlined. At right is a blowup of the outlined area with four globular clusters circled.\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=3219&#038;h=1330&#038;fit=crop&#038;crop=faces%2Cfocalpoint 3219w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=300&#038;h=124&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=768&#038;h=317&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=1024&#038;h=423&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=1536&#038;h=635&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=2048&#038;h=846&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=400&#038;h=165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=600&#038;h=248&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=900&#038;h=372&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=1200&#038;h=496&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/02\/STScI-01K7PT2W3AKQM558XCYVNAR375.jpg?w=2000&#038;h=826&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 3219px) 100vw, 3219px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">Dark Galaxy Near Perseus Cluster (Compass Image)<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">This image of dark galaxy CDG-2 was captured by the Hubble Space Telescope\u2019s ACS (Advanced Camera for Surveys) with additional data from the European Space Agency\u2019s Euclid space mission. The image shows a scale bar, compass arrows, and color key for reference.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/asset\/hubble\/dark-galaxy-near-perseus-cluster-compass-image\/\"  aria-label=\"Dark Galaxy Near Perseus Cluster (Compass Image)\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"hds-featured-link-list bg-carbon-05 padding-x-2 tablet:padding-x-3 desktop:padding-x-4 padding-y-5 desktop:padding-y-6 hds-module hds-module-full alignfull wp-block-nasa-blocks-featured-link-list\">\n<div class=\"grid-container grid-container-block padding-0\">\n<div class=\"margin-bottom-4\">\n<h2 class=\"heading-22\">\n\t\t\t\tExplore More\t\t\t<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/04\/hubble_liller1_potw2221a-jpg.webp?w=150&#038;h=150&#038;%23038;crop=1\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Dense cluster of orange-white stars at center. bright blue-white stars cover the field of view.\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/04\/hubble_liller1_potw2221a-jpg.webp?resize=150,150 150w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/04\/hubble_liller1_potw2221a-jpg.webp?resize=50,50 50w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/04\/hubble_liller1_potw2221a-jpg.webp?resize=100,100 100w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/04\/hubble_liller1_potw2221a-jpg.webp?resize=200,200 200w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">Hubble\u2019s Star Clusters<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">These jewels of the night sky offer us a glimpse at the lifecycle of stars.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/science\/universe-uncovered\/hubble-star-clusters\/\"  aria-label=\"\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"3456\" height=\"2234\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=3456&#038;h=2234&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Hubble appears on the screen of a laptop surrounded by yellow, technical-looking digital text and keyboards\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=3456&#038;h=2234&#038;fit=crop&#038;crop=faces%2Cfocalpoint 3456w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=300&#038;h=194&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=768&#038;h=496&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=1024&#038;h=662&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=1536&#038;h=993&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=2048&#038;h=1324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=400&#038;h=259&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=600&#038;h=388&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=900&#038;h=582&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=1200&#038;h=776&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/misc\/Hubble_with_laptop_illlustration.png?w=2000&#038;h=1293&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 3456px) 100vw, 3456px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">AI and Hubble Science<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">Artificial intelligence programs search massive data collections, assisting researchers in scientific investigations.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/science\/ai-hubble-science\/\"  aria-label=\"\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\"><br \/>\n<html><body><\/p>\n<div id=\"\" class=\"nasa-gb-align-full width-full maxw-full padding-x-3 padding-y-0 nasa_template_article_b hds-module hds-module-full alignfull wp-block-nasa-blocks-credits-and-details\">\n<section class=\"padding-x-0 padding-top-5 padding-bottom-2 desktop:padding-top-7 desktop:padding-bottom-9\">\n<div class=\"grid-row grid-container maxw-widescreen padding-0\">\n<div class=\"grid-col-12 desktop:grid-col-2 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black\">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Share<\/h2>\n<\/p>\n<\/div>\n<div class=\"padding-bottom-2\">\n<ul class=\"social-icons social-icons-round\">\n<li class=\"social-icon social-icon-x\">\n\t\t\t\t\t\t\t<a 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2.5s-2.48-1.119-2.48-2.5c0-1.38 1.11-2.5 2.48-2.5s2.48 1.12 2.48 2.5zm.02 4.5h-5v16h5v-16zm7.982 0h-4.968v16h4.969v-8.399c0-4.67 6.029-5.052 6.029 0v8.399h4.988v-10.131c0-7.88-8.922-7.593-11.018-3.714v-2.155z\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<li class=\"social-icon social-icon-rss\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/feed\/\" aria-label=\"Subscribe to RSS feed.\"><br \/>\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 800 800\" aria-hidden=\"true\"><path d=\"M493 652H392c0-134-111-244-244-244V307c189 0 345 156 345 345zm71 0c0-228-188-416-416-416V132c285 0 520 235 520 520z\"><\/path><circle cx=\"219\" cy=\"581\" r=\"71\"><\/circle><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black\">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Details<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row margin-bottom-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Last Updated<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-col-8\">Feb 18, 2026<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-row margin-bottom-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Editor<\/div>\n<\/div>\n<div class=\"grid-col-8\">Andrea Gianopoulos<\/div>\n<\/div>\n<div class=\"grid-row\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Location<\/div>\n<\/div>\n<div class=\"grid-col-8\"><a class=\"hds-location-tag-name\" href=\"https:\/\/nasa.gov\/goddard\" rel=\"noopener\"><span class=\"hds-meta-heading\">NASA Goddard Space Flight Center<\/span><\/a><\/div>\n<\/div>\n<div class=\"grid-row margin-y-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Contact<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-col-8\">\n<div class=\"margin-bottom-3\">\n<div class=\"heading-16 padding-bottom-1 border-bottom margin-bottom-2\">Media<\/div>\n<div class=\"cnd-extra-left-wysiwyg\">\n<p><strong>Claire Andreoli<\/strong><br \/>\nNASA\u2019s Goddard Space Flight Center<br \/>\nGreenbelt, Maryland<br \/>\n<a href=\"mailto:claire.andreoli@nasa.gov\">claire.andreoli@nasa.gov<\/a><\/p>\n<p><strong>Christine Pulliam<\/strong><br \/>\nSpace Telescope Science Institute<br \/>\nBaltimore, Maryland<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black \">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Related Terms<\/h2>\n<\/div>\n<ul class=\"article-tags\">\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/mission\/hubble\" rel=\"noopener\">Hubble Space Telescope<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/astrophysics\/\" rel=\"noopener\">Astrophysics<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/astrophysics\/\" rel=\"noopener\">Astrophysics Division<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/category\/universe\/dark-matter\/\" rel=\"noopener\">Dark Matter<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/universe\/galaxies\/\" rel=\"noopener\">Galaxies<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/category\/universe\/stars\/star-clusters\/globular-clusters\/\" rel=\"noopener\">Globular Clusters<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/www.nasa.gov\/goddard\/\" rel=\"noopener\">Goddard Space Flight Center<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/universe\/\" rel=\"noopener\">The Universe<\/a><\/li>\n<\/ul>\n<p><html><body><\/p>\n<div class=\"margin-top-6\">\n<h2 class=\"heading-14 margin-bottom-2\">Related Links and Documents<\/h2>\n<div class=\"cnd-extra-right-wysiwyg\">\n<ul>\n<li><a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/2041-8213\/adddab\/meta\" rel=\"noopener\">The science paper by D. Li et al.<\/a><\/li>\n<li><a href=\"https:\/\/www.statistics.utoronto.ca\/news\/candidate-dark-galaxy-2-u-t-researchers-shine-new-light-universe%E2%80%99s-darkest-realms\" rel=\"noopener\">University of Toronto Press Release<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><\/body><\/html><\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<p><\/body><\/html><\/p>\n<div id=\"\" class=\"hds-topic-cards nasa-gb-align-full maxw-full width-full padding-y-6 padding-x-3 color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-topic-cards\">\n<div class=\"grid-container grid-container-block-lg padding-x-0\">\n<div class=\"grid-row flex-align-center margin-bottom-3\">\n<div class=\"desktop:grid-col-8 margin-bottom-2 desktop:margin-bottom-0\">\n<div class=\"label color-carbon-60 margin-bottom-2\">Keep Exploring<\/div>\n<h2 class=\"heading-36 line-height-sm\">Discover More Topics From Hubble<\/h2>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row grid-gap-2 hds-topic-cards-wrapper\">\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Space Telescope<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/assets.science.nasa.gov\/content\/dam\/science\/missions\/hubble\/videos\/hubble-banner-animation-nov-2025-compressed.gif?w=1920&#038;h=1080&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" \/><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/science\/science-highlights\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<p class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Science Highlights<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"539\" height=\"565\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/astro\/universe\/internal_resources\/462\/Pillars_of_Creation-1.jpeg?w=539&#038;h=565&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" \/><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/multimedia\/hubble-images\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<p class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Images<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1120\" height=\"1120\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2024\/07\/STScI-01J1X1RNTC893XMKJREG898ZXB.tif?w=1120&#038;h=1120&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" style=\"transform: scale(1); 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Yet a rare class of galaxies remains nearly invisible \u2014 low-surface-brightness galaxies dominated by dark matter and containing only a sparse scattering of faint stars. One such elusive object, dubbed CDG-2, may be among the most heavily dark matter-dominated [\u2026]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[15612,15613,16484,15757,16500,15614,15615,15638],"tags":[],"class_list":["post-371737","post","type-post","status-publish","format-standard","hentry","category-astrophysics","category-astrophysics-division","category-dark-matter","category-galaxies","category-globular-clusters","category-goddard-space-flight-center","category-hubble-space-telescope","category-the-universe"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/371737","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=371737"}],"version-history":[{"count":2,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/371737\/revisions"}],"predecessor-version":[{"id":371745,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/371737\/revisions\/371745"}],"wp:attachment":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=371737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=371737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=371737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}