{"id":5058,"date":"2026-06-23T21:52:47","date_gmt":"2026-06-23T19:52:47","guid":{"rendered":"https:\/\/www.adrianoalfaro.com\/?page_id=5058"},"modified":"2026-06-24T21:02:41","modified_gmt":"2026-06-24T19:02:41","slug":"planetary-nebulae","status":"publish","type":"page","link":"https:\/\/www.adrianoalfaro.com\/en\/astrophotography\/planetary-nebulae\/","title":{"rendered":"Planetary nebulae"},"content":{"rendered":"<div class=\"et_pb_section_0 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_0 et_pb_row et_flex_row aa-bg-move aa-bg-zoom\">\n<div class=\"et_pb_column_0 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_0 et_pb_text et_pb_bg_layout_dark et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h2>Astrophotography<\/h2>\n<h1>Planetary nebulae<\/h1>\n<p>A planetary nebula is an emission nebula formed by a glowing shell of expanding ionized gas, expelled by certain types of stars during the final stages of their life.<\/p>\n<\/div><\/div>\n\n<div class=\"et_pb_module et_pb_button_module_wrapper et_pb_button_0_wrapper\"><a class=\"et_pb_button_0 et_pb_button et_pb_bg_layout_light et_pb_module et_flex_module\" href=\"#gallery\">Explore<\/a><\/div>\n\n<div class=\"et_pb_code_0 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><style>\n.aa-bg-zoom {\n  background-size: 145% auto !important;\n}  \n  \n\/* HERO \/ RIGHE GRANDI CON SFONDO *\/\n.aa-bg-move {\n  overflow: hidden;\n  background-size: 110% !important;\n  background-position: var(--aa-bg-x, 50%) var(--aa-bg-y, 50%) !important;\n  transition: background-position 0.35s ease-out;\n  will-change: background-position;\n}\n\n\/* CARD \/ COLONNE \/ MODULI CON SFONDO *\/\n.aa-bg-move-item {\n  overflow: hidden;\n  background-size: cover !important;\n  background-position: var(--aa-bg-x, 50%) var(--aa-bg-y, 50%) !important;\n  transition: background-position 0.35s ease-out;\n  will-change: background-position;\n}\n\n\/* Se Divi usa livelli interni per background\/parallax *\/\n.aa-bg-move .et_parallax_bg,\n.aa-bg-move-item .et_parallax_bg {\n  background-size: inherit !important;\n  background-position: var(--aa-bg-x, 50%) var(--aa-bg-y, 50%) !important;\n  transition: background-position 0.35s ease-out;\n  will-change: background-position;\n}\n\n\/* Tablet e mobile: effetto disattivato *\/\n@media (max-width: 980px), (hover: none) {\n  .aa-bg-move,\n  .aa-bg-move-item,\n  .aa-bg-move .et_parallax_bg,\n  .aa-bg-move-item .et_parallax_bg {\n    background-size: cover !important;\n    background-position: center center !important;\n  }\n}\n<\/style>\n\n<script>\n(function () {\n  function initAABackgroundMove() {\n    const elements = document.querySelectorAll('.aa-bg-move, .aa-bg-move-item');\n\n    elements.forEach(function (el) {\n      const isItem = el.classList.contains('aa-bg-move-item');\n      const strength = isItem ? 5 : 4;\n\n      el.addEventListener('mousemove', function (e) {\n        if (window.innerWidth <= 980) return;\n\n        const rect = el.getBoundingClientRect();\n\n        const x = ((e.clientX - rect.left) \/ rect.width - 0.5) * 2;\n        const y = ((e.clientY - rect.top) \/ rect.height - 0.5) * 2;\n\n        const bgX = 50 - x * strength;\n        const bgY = 50 - y * strength;\n\n        el.style.setProperty('--aa-bg-x', bgX + '%');\n        el.style.setProperty('--aa-bg-y', bgY + '%');\n      });\n\n      el.addEventListener('mouseleave', function () {\n        el.style.setProperty('--aa-bg-x', '50%');\n        el.style.setProperty('--aa-bg-y', '50%');\n      });\n    });\n  }\n\n  if (document.readyState === 'loading') {\n    document.addEventListener('DOMContentLoaded', initAABackgroundMove);\n  } else {\n    initAABackgroundMove();\n  }\n})();\n<\/script><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_section_1 et_pb_section et_section_regular et_flex_section\"><div class=\"et_pb_row_1 et_pb_row et_flex_row\"><div class=\"et_pb_column_1 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\"><div class=\"et_pb_text_1 et_pb_text et_pb_bg_layout_dark et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h4>Adriano Alfaro<\/h4>\n<h3>Explore the astrophotography archive<\/h3>\n<p>This gallery is part of my astrophotography collection. Visit the main page to explore all categories, read insights and curiosities, and discover the equipment I use.<\/p>\n<\/div><\/div><div class=\"et_pb_module et_pb_button_module_wrapper et_pb_button_1_wrapper\"><a class=\"et_pb_button_1 et_pb_button et_pb_bg_layout_light et_pb_module et_flex_module\" href=\"https:\/\/www.adrianoalfaro.com\/astrofotografia\/\">Main page<\/a><\/div><\/div><\/div><\/div>\n\n<div class=\"et_pb_section_2 et_pb_section et_section_regular et_block_section\" id=\"gallery\">\n<div class=\"et_pb_row_2 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_2 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_3_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_1 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><a href=\"https:\/\/telescopius.com\/pictures\/view\/276664\/deep_sky\/dumbbell-nebula\/m27-dumbbell-nebula\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-ea6e77591e984393d5c41a0d94bea087-original_jpg-1080x1080.jpg\" width=\"100%\" \/><\/a>\nby <a href=\"https:\/\/telescopius.com\/profile\/adriano.alfaro\">adriano.alfaro<\/a> on <a href=\"https:\/\/telescopius.com\">Telescopius<\/a><\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_3 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_2_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_2 et_pb_text et_pb_bg_layout_dark et_pb_module et_block_module\"><div class=\"et_pb_text_inner\"><h3>M27 Dumbbell nebula<\/h3>\n<ul>\n<li>Integrazione | 12 ore e 59 minuti (10 ore e 13 minuti e 20 secondi in LP, 2 ore, 45 minuti e 40 secondi in IRCUT)<\/li>\n<li>Sorrento | 2025-2026<\/li>\n<li>Telescopio | ZWO Seestar S50<a href=\"https:\/\/www.facebook.com\/groups\/6984345391659698\/posts\/24961200843547544\/\" target=\"_blank\" rel=\"noopener\"><em><\/em><\/a><\/li>\n<li>Drizzle | x2<em><\/em><\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_3 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_4 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_3_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_2 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><a href=\"https:\/\/telescopius.com\/pictures\/view\/247051\/deep_sky\/ngc-7293\/ngc-7293-helix-nebula\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-c181c4a7067fd21524dde557c81ce767-original_jpg-1380x1840.jpg\" width=\"100%\" \/><\/a>\nby <a href=\"https:\/\/telescopius.com\/profile\/adriano.alfaro\">adriano.alfaro<\/a> on <a href=\"https:\/\/telescopius.com\">Telescopius<\/a><\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_5 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_2_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_3 et_pb_text et_pb_bg_layout_dark et_pb_module et_block_module\"><div class=\"et_pb_text_inner\"><h3>NGC 7293 Helix nebula<\/h3>\n<ul>\n<li>Integrazione | 9 ore e 4 minuti in LP<\/li>\n<li>Sorrento | 2025<\/li>\n<li>Telescopio | ZWO Seestar S50<\/li>\n<li>Finalista | <a href=\"https:\/\/www.facebook.com\/groups\/6984345391659698\/posts\/24961200843547544\/\" target=\"_blank\" rel=\"noopener\">Contest <em>Seestar Italia - ZWO 2025<\/em><\/a><\/li>\n<li>Drizzle | x2<em><\/em><\/li>\n<\/ul>\n<div class=\"xdj266r x14z9mp xat24cr x1lziwak x1vvkbs x126k92a\">\n<div dir=\"auto\" style=\"text-align: start;\">\n<p>NGC 7293, also known as the Helix nebula, is one of the most spectacular objects in the southern sky. Located in the constellation Aquarius, about 650 light-years from Earth, it is one of the closest and largest planetary nebulae visible from our planet.<br \/>It represents the final breath of a Sun-like star, which expelled its outer layers into space, leaving behind a white dwarf at its center \u2014 the fate that awaits our own Sun in a few billion years.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_4 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_6 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_3_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_3 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><a href=\"https:\/\/telescopius.com\/pictures\/view\/259014\/deep_sky\/pk-164-31-1\/headphones-nebula\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-434c13ccd70858f0f212a5cbadbb4697-original_jpg-1080x1080.jpg\" width=\"100%\" \/><\/a>\nby <a href=\"https:\/\/telescopius.com\/profile\/adriano.alfaro\">adriano.alfaro<\/a> on <a href=\"https:\/\/telescopius.com\">Telescopius<\/a>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_7 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_2_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_4 et_pb_text et_pb_bg_layout_dark et_pb_module et_block_module\"><div class=\"et_pb_text_inner\"><h3>PK 164+31.1 Headphones nebula<\/h3>\n<ul>\n<li>Integrazione | 15 ore e 37 minuti (9 ore, 57 minuti e 40 secondi in LP, 5 ore, 40 minuti e 10 secondi in IRCUT)<\/li>\n<li>Sorrento | 2026<\/li>\n<li>Telescopio | ZWO Seestar S50<\/li>\n<li>Drizzle | x2<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_5 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_8 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_2_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_5 et_pb_text et_pb_bg_layout_dark et_pb_module et_block_module\"><div class=\"et_pb_text_inner\"><h3>M97 Owl nebula<\/h3>\n<ul>\n<li>Integrazione | 21 ore e 20 minuti (15 ore, 46 minuti e 40 secondi in LP, 5 ore, 33 minuti e 20 secondi in IRCUT)<\/li>\n<li>Sorrento | 2025-2026<\/li>\n<li>Telescopio | ZWO Seestar S50<\/li>\n<li>Drizzle | x3<\/li>\n<\/ul>\n<p>M97 \u2014 the Owl nebula, a planetary nebula in the constellation Ursa Major.<br \/>Planetary nebulae are among my favorite objects to image. They\u2019re small, often overlooked, but incredibly rich in structure and detail.<br \/>Located about 2,000 light-years away, M97 is the glowing shell of gas expelled by a dying Sun-like star. Its nickname comes from the two darker regions inside the nebula that resemble the eyes of an owl.<br \/>The blue-green color is mainly due to ionized oxygen, while the outer, fainter halo reveals older material ejected in previous phases. These layered structures tell the story of how the star lost its outer envelope over time.<br \/>At the center lies a very faint white dwarf \u2014 the remnant core that will slowly cool down over billions of years.<\/p>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_9 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_3_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_4 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><a href=\"https:\/\/telescopius.com\/pictures\/view\/263714\/deep_sky\/m-97\/m97-owl-nebula\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-11f0767416ccc2ceb049750884161061-thumbnail-427x427.jpg\" width=\"100%\"\/><\/a>\nby <a href=\"https:\/\/telescopius.com\/profile\/adriano.alfaro\">adriano.alfaro<\/a> on <a href=\"https:\/\/telescopius.com\">Telescopius<\/a><\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_6 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_10 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_3_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_5 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><a href=\"https:\/\/telescopius.com\/pictures\/view\/273325\/deep_sky\/pn-a66-39\/abell-39-planetary-nebula\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-a83a4e42a308418d73ceb8406e18d50f-original_jpg-1080x1080.jpg\" width=\"100%\" \/><\/a>\nby <a href=\"https:\/\/telescopius.com\/profile\/adriano.alfaro\">adriano.alfaro<\/a> on <a href=\"https:\/\/telescopius.com\">Telescopius<\/a>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_11 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_2_5 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_6 et_pb_text et_pb_bg_layout_dark et_pb_module et_block_module\"><div class=\"et_pb_text_inner\"><h3>Abell 39<\/h3>\n<ul>\n<li>Integrazione | 18 ore e 56 minuti (12 ore, 56 minuti e 10 secondi in LP, 6 ore e 30 secondi in IRCUT)<\/li>\n<li>Sorrento | 2025-2026<\/li>\n<li>Telescopio | ZWO Seestar S50<\/li>\n<li>Drizzle | x3<\/li>\n<\/ul>\n<p>Abell 39 \u2014 a beautiful and very delicate planetary nebula in the constellation Hercules. Located around 6,800 light-years away, Abell 39 is one of the most remarkably spherical planetary nebulae known. It was formed when a dying Sun-like star expelled its outer layers into space, creating this nearly perfect bubble of glowing gas.<br \/>What makes it especially fascinating is its symmetry. Unlike many planetary nebulae that appear irregular or complex, Abell 39 looks almost like a transparent cosmic shell suspended in space. Its soft turquoise color is mainly caused by ionized oxygen, while the faint reddish outer regions come from hydrogen emission.<br \/>The central star, visible near the middle of the nebula, is the hot stellar remnant responsible for making the gas glow. Over time, this shell will continue to expand and fade into the interstellar medium.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n<\/div>\n\n<div class=\"et_pb_section_3 et_pb_section et_section_regular et_flex_section\" id=\"esplora\"><div class=\"et_pb_row_8 et_pb_row et_flex_row\"><div class=\"et_pb_column_14 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\"><div class=\"et_pb_text_8 et_pb_text et_pb_bg_layout_dark et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h4>Galleries<\/h4>\n<h3>Explore the astrophotography categories<\/h3>\n<\/div><\/div><\/div><\/div><div class=\"et_pb_row_9 et_pb_row et_grid_row aa-bg-move-grid\"><div class=\"et_pb_column_15 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_9 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Nebulae<\/h3>\n<p>HII regions, emission and reflection nebulae, and supernova remnants.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_16 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_10 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Galaxies<\/h3>\n<p>Spiral, elliptical, irregular, and interacting galaxies.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_17 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_11 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Planetary nebulae<\/h3>\n<p>Shells of gas expelled by dying stars.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_18 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_12 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Open clusters<\/h3>\n<p>Groups of stars formed from the same molecular cloud.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_19 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_13 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Solar system<\/h3>\n<p>The Moon, Sun, planets, and comets.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_20 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_14 et_pb_text et_pb_bg_layout_dark et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Milky Way<\/h3>\n<p>The Milky Way, constellations, and wide regions of the sky.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_21 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_15 et_pb_text et_pb_bg_layout_dark et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Auroras<\/h3>\n<p>Luminous phenomena in Earth\u2019s atmosphere.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_22 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item aa-bg-zoom\"><div class=\"et_pb_text_16 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Dark nebulae<\/h3>\n<p>Clouds of interstellar dust.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_23 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_17 et_pb_text et_pb_bg_layout_dark et_clickable et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3>Globular clusters<\/h3>\n<p>Dense groups of stars.<\/p>\n<\/div><\/div><\/div><\/div><div class=\"et_pb_row_10 et_pb_row et_flex_row\"><div class=\"et_pb_column_24 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\"><div class=\"et_pb_module et_pb_button_module_wrapper et_pb_button_2_wrapper\"><a class=\"et_pb_button_2 et_pb_button et_pb_bg_layout_light et_pb_module et_flex_module\" href=\"https:\/\/www.adrianoalfaro.com\/astrofotografia\/\">Astrophotography index<\/a><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":5042,"parent":4970,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"dipi_cpt_category":[],"class_list":["post-5058","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Planetary nebulae &#183; 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