{"id":561613,"date":"2026-10-02T14:05:00","date_gmt":"2026-10-02T04:05:00","guid":{"rendered":"https:\/\/science.nasa.gov\/image-article\/apod-2026-october-2-the-complete-sharpless-catalog-313-nebulae\/"},"modified":"2026-10-02T14:05:00","modified_gmt":"2026-10-02T04:05:00","slug":"apod-2026-october-2-the-complete-sharpless-catalog-313-nebulas","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=561613","title":{"rendered":"APOD: 2026 October 2 \u2013 The Complete Sharpless Catalog: 313 Nebulas"},"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>APOD<\/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 hds-secondary-navigation-has-breadcrumbs\">\n<div class=\"hds-secondary-navigation-breadcrumbs display-none tablet:display-none desktop:display-flex flex-align-center\">\n<nav class=\"usa-breadcrumb\" aria-label=\"Breadcrumbs\">\n<ol class=\"usa-breadcrumb__list\">\n<li class=\"usa-breadcrumb__list-item\"><a href=\"https:\/\/science.nasa.gov\/\" class=\"usa-breadcrumb__link\" rel=\"noopener\"><span>Science<\/span><\/a><\/li>\n<li class=\"usa-breadcrumb__list-item\"><a href=\"https:\/\/science.nasa.gov\/apod\/apod-index\/\" class=\"usa-breadcrumb__link\" rel=\"noopener\"><span>APOD<\/span><\/a><\/li>\n<li class=\"usa-breadcrumb__list-item usa-current\" aria-current=\"page\"><span>APOD: 2026 October 2 \u2013 The\u2026<\/span><\/li>\n<\/ol>\n<\/nav>\n<\/div>\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\/apod\/\" rel=\"noopener\">Today\u2019s APOD<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/archive\/\" rel=\"noopener\">Archive<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/submit\/\" rel=\"noopener\">Submissions<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/apod-index\/\" rel=\"noopener\">Index<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/apod-search\/\" rel=\"noopener\">Search<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/apod-calendar\/\" rel=\"noopener\">Calendar<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/feed\/apod-basic\/\" rel=\"noopener\">RSS<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/apod-education\/\" rel=\"noopener\">Education<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/science.nasa.gov\/apod\/apod-about\/\" rel=\"noopener\">About<\/a><\/li>\n<li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/asterisk.apod.com\/discuss_apod.php?date=261002\" rel=\"noopener\">Discuss<\/a><\/li>\n<\/ul>\n<\/nav>\n<\/div>\n<div class=\"hds-secondary-navigation-menu-spacer\">\u00a0<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"hds-media-detail-hero nasa-gb-align-wide width-full maxw-full margin-y-5 desktop:margin-y-7 padding-x-3 media-detail-hero--suppress-inner-media-caption hds-module alignwide wp-block-nasa-blocks-media-detail-hero\">\n<div class=\"grid-container grid-container-block padding-x-0\">\n<p class=\"label margin-bottom-1\">APOD<\/p>\n<p class=\"heading-22 margin-top-0 margin-bottom-2\">Astronomy Picture of the Day<\/p>\n<p class=\"p-md margin-top-0 margin-bottom-3 media-detail-hero__subtext\">\n\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/apod\/archive\/\">Discover the cosmos!<\/a> Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.\t\t\t<\/p>\n<div class=\"media-detail-hero__media margin-bottom-6\">\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-full\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=4455&#038;h=5592&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"4455\" height=\"5592\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=4455&#038;h=5592&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"313 separate images of nebulae that resemble a variety of shapes and brightnesses. Some are dim and whispy, others are bright and create structure. Each image traces the complex behavior of interstellar gas.\" style=\"transform: scale(1); 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\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=4455&#038;h=5592&#038;fit=crop&#038;crop=faces%2Cfocalpoint 4455w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=239&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 239w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=768&#038;h=964&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=816&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 816w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=1224&#038;h=1536&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1224w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=1632&#038;h=2049&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1632w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=319&#038;h=400&#038;fit=crop&#038;crop=faces%2Cfocalpoint 319w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=478&#038;h=600&#038;fit=crop&#038;crop=faces%2Cfocalpoint 478w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=717&#038;h=900&#038;fit=crop&#038;crop=faces%2Cfocalpoint 717w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=956&#038;h=1200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 956w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/apod\/apod\/2026\/october\/sharpless_catalog.png?w=1593&#038;h=2000&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1593w\" sizes=\"auto, (max-width: 4455px) 100vw, 4455px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h1 class=\"display-48 margin-top-0 margin-bottom-3\">The Complete Sharpless Catalog: 313 Nebulas<\/h1>\n<div class=\"grid-row media-detail-hero__content-row\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 media-detail-hero__description\">\n\t\t\t\t\t\t\t<strong>Explanation:<\/strong> What does it take to image hundreds of nebulas? <a href=\"https:\/\/xhslink.cn\/o\/8xwq05fWO1P\" rel=\"noopener\">Today\u2019s image<\/a> contains the entire <a href=\"https:\/\/articles.adsabs.harvard.edu\/pdf\/1959ApJS....4..257S\" rel=\"noopener\">Sharpless Catalog of H II Regions<\/a>, totaling 313 objects. Zoom in and explore! You may spot fan favorites like the <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2026-june-10-the-eagle-nebula-and-friends\/\" rel=\"noopener\">Eagle<\/a> (Sh2-49), <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2023-december-13-deep-field-the-heart-nebula\/\" rel=\"noopener\">Heart<\/a> (Sh2-190), and <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2025-april-20-the-orion-nebula-in-visible-and-infrared\/\" rel=\"noopener\">Orion<\/a> (Sh2-281) Nebulas. Despite its name, this catalog contains more than the glow of ionized hydrogen that makes up <a href=\"http:\/\/spiff.rit.edu\/classes\/phys371\/lectures\/hii_i\/hii_i.html\" rel=\"noopener\">H II regions<\/a>. There are <a href=\"https:\/\/esahubble.org\/wordbank\/planetary-nebula\/\" rel=\"noopener\">planetary nebulas<\/a> (the <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2024-november-22-the-medusa-nebula\/\" rel=\"noopener\">Medusa Nebula<\/a>, Sh2-274) and <a href=\"https:\/\/science.gsfc.nasa.gov\/662\/research\/snrs.html\" rel=\"noopener\">supernova remnants<\/a> (the <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2026-january-7-simeis-147-the-spaghetti-nebula-supernova-remnant\/\" rel=\"noopener\">Spaghetti Nebula<\/a>, Sh2-240) as well. Astrophotographer Bing Xin traversed the dark skies of Eastern China and Inner Mongolia to <a href=\"https:\/\/www.youtube.com\/watch?v=MpaHR-V_R-o\" rel=\"noopener\">catch them all<\/a>. Narrowband <a href=\"https:\/\/www.astronomy.com\/observing\/using-filters\/\" rel=\"noopener\">filters<\/a> that primarily capture light from ionized hydrogen and oxygen as well as red-green-blue filters were used. Each object took 2 to 6 hours to capture, with the entire catalog taking around 800 hours to complete! Which object is <a href=\"https:\/\/asterisk.apod.com\/discuss_apod.php?date=261002\" rel=\"noopener\">your favorite<\/a>?<\/p>\n<p><strong>APOD\u2019s email for image submissions has changed.<\/strong> Please see: <a href=\"https:\/\/science.nasa.gov\/apod\/submit\/\" rel=\"noopener\">APOD Submissions<\/a><br \/><strong>Tomorrow\u2019s picture:<\/strong> just Curiosity\t\t\t\t\t\t<\/p>\n<\/p>\n<\/div>\n<div class=\"display-none desktop:display-block desktop:grid-col-1\" aria-hidden=\"true\"><\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 margin-top-3 desktop:margin-top-0\">\n<table class=\"media-detail-hero__meta-table width-full\">\n<tbody>\n<tr class=\"media-detail-hero__meta-row\">\n<th scope=\"row\" class=\"label padding-y-1\">Date:<\/th>\n<td class=\"p-sm padding-y-1\">\n\t\t\t\t\t\t\t\t\t\t\t\tOctober 2, 2026\t\t\t\t\t\t\t\t\t\t\t<\/td>\n<\/tr>\n<tr class=\"media-detail-hero__meta-row\">\n<th scope=\"row\" class=\"label padding-y-1\">Credit:<\/th>\n<td class=\"p-sm padding-y-1\">\n\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.xiaohongshu.com\/user\/profile\/5f49cf24000000000101c8c7\" rel=\"noopener\">Bing Xin<\/a>\t\t\t\t\t\t\t\t\t\t\t<\/td>\n<\/tr>\n<tr class=\"media-detail-hero__meta-row\">\n<th scope=\"row\" class=\"label padding-y-1\">Authors &#038; editors:<\/th>\n<td class=\"p-sm padding-y-1\">\n\t\t\t\t\t\t\t\t\t\t\t\tKeighley Rockcliffe, Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti\t\t\t\t\t\t\t\t\t\t\t<\/td>\n<\/tr>\n<tr class=\"media-detail-hero__meta-row\">\n<th scope=\"row\" class=\"label padding-y-1\">A service of:<\/th>\n<td class=\"p-sm padding-y-1\">\n\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/science.gsfc.nasa.gov\/astrophysics\/\"  rel=\"noopener\">ASD<\/a> at <a href=\"https:\/\/www.nasa.gov\/\"  rel=\"noopener\">NASA<\/a> \/ <a href=\"https:\/\/www.nasa.gov\/centers\/goddard\/\"  rel=\"noopener\">GSFC<\/a>,<br \/><a href=\"https:\/\/science.nasa.gov\/learn\/about-science-activation\/\"  rel=\"noopener\">NASA Science Activation<\/a> &#038; <a href=\"https:\/\/www.mtu.edu\/\"  rel=\"noopener\">Michigan Tech. U.<\/a>\t\t\t\t\t\t\t\t\t\t\t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"nasa-gb-align-wide nasa-button-link padding-y-1 padding-x-0 hds-module alignwide wp-block-nasa-blocks-related-link\">\n\t\t\t<a href=\"https:\/\/science.nasa.gov\/apod\/random-apod\/\"  class=\"button-primary button-primary-md link-external-false\" aria-label=\"Random APOD Generator\" rel=\"noopener\"><br \/>\n\t\t\t<span class=\"line-height-alt-1\">Random APOD Generator<\/span><br \/>\n\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"button-primary-circle\" 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<\/a><\/p>\n<\/div>\n<div style=\"height:1px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div id=\"\" class=\"hds-module alignwide wp-block-smd-block-next-prev\">\n<div class=\"smd-next-prev-buttons-titles\">\n            <a class=\"smd-next-prev__prev\" href=\"https:\/\/science.nasa.gov\/image-article\/apod-2026-october-1-harvest-moon-with-belt-of-venus-and-erupting-mount-etna\/\" rel=\"noopener\"><\/p>\n<div class=\"hds-next-prev-nav-arrow hds-next-prev-arrow-prev\">\n                    <svg version=\"1.1\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewBox=\"0 0 9 9\"><path class=\"st0\" d=\"M3.5,4.5l3.7-3.6L6.3,0L1.8,4.5L6.3,9l0.9-0.9L3.5,4.5z\"><\/path><\/svg>\n                <\/div>\n<div class=\"smd-next-prev-buttons-titles__content\">\n<div class=\"smd-next-prev-buttons-titles__prev-label\">\n                        Yesterday&#8217;s Image                    <\/div>\n<div class=\"smd-next-prev-buttons-titles__prev\">\n                        APOD: 2026 October 1 \u2013 Harvest Moon with Erupting Mount Etna                    <\/div>\n<\/p>\n<\/div>\n<p>            <\/a><br \/>\n            <a class=\"smd-next-prev__next smd-next-prev__disabled\" href=\"https:\/\/science.nasa.gov\/image-article\/apod-2026-october-2-the-complete-sharpless-catalog-313-nebulae\/#\"><\/p>\n<div class=\"smd-next-prev-buttons-titles__content\">\n<div class=\"smd-next-prev-buttons-titles__next-label\">\n                        Tomorrow&#8217;s Image                    <\/div>\n<div class=\"smd-next-prev-buttons-titles__next\">\n                                            <\/div>\n<\/p>\n<\/div>\n<div class=\"hds-next-prev-nav-arrow hds-next-prev-arrow-next\">\n                    <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewBox=\"0 0 9 9\"><path class=\"st0\" d=\"M5.5,4.5L1.8,8.1L2.7,9l4.5-4.5L2.7,0L1.8,0.9L5.5,4.5z\"><\/path><\/svg>\n                <\/div>\n<p>            <\/a>\n        <\/div>\n<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>What does it take to image hundreds of nebulas? Today\u2019s image contains the entire Sharpless Catalog of H II Regions, totaling 313 objects. Zoom in and explore!<\/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,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[20768],"tags":[],"class_list":["post-561613","post","type-post","status-publish","format-standard","hentry","category-apod"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"What does it take to image hundreds of nebulas? Today\u2019s image contains the entire Sharpless Catalog of H II Regions, totaling 313 objects. 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