{"id":5053,"date":"2026-06-23T21:50:39","date_gmt":"2026-06-23T19:50:39","guid":{"rendered":"https:\/\/www.adrianoalfaro.com\/?page_id=5053"},"modified":"2026-06-24T21:03:49","modified_gmt":"2026-06-24T19:03:49","slug":"open-clusters","status":"publish","type":"page","link":"https:\/\/www.adrianoalfaro.com\/en\/astrophotography\/open-clusters\/","title":{"rendered":"Open clusters"},"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>Open clusters<\/h1>\n<p>An open cluster is a group of stars that formed together from the same giant molecular cloud and are still loosely bound by their mutual gravity.<\/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\/263784\/deep_sky\/ic-349\/m45-pleiades\/by-adriano.alfaro\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/dso-browser.com\/astrophotography\/picture-2b3e63f91f34c270f33186a857d69acf-uhd-1620x2160.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_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>M45 Pleiadi<\/h3>\n<ul>\n<li>Integrazione | 36 ore e 17 minuti in IRCUT<\/li>\n<li>Adriano Alfaro, Cheems,\u00a0mattitech | 2025-2026<\/li>\n<li>Telescopio | ZWO Seestar S50<\/li>\n<li>Drizzle | x1<\/li>\n<\/ul>\n<p>M45 \u2014 the Pleiades, one of the most recognizable star clusters in the night sky.<br \/>Located about 440 light-years away in the constellation Taurus, this young open cluster is composed of hot, blue stars formed roughly 100 million years ago. The delicate blue glow surrounding them is not emission, but reflection nebula \u2014 interstellar dust reflecting the light of these bright stars.<br \/>That soft, wispy structure reveals the interaction between starlight and dust, giving the Pleiades their iconic appearance.<\/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_4 et_pb_row et_flex_row\"><div class=\"et_pb_column_6 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_4 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_5 et_pb_row et_grid_row aa-bg-move-grid\"><div class=\"et_pb_column_7 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_5 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_8 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_6 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_9 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable aa-bg-move-item\"><div class=\"et_pb_text_7 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_10 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_8 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_11 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>Solar system<\/h3>\n<p>The Moon, Sun, planets, and comets.<\/p>\n<\/div><\/div><\/div><div class=\"et_pb_column_12 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_10 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_13 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough aa-bg-move-item\"><div class=\"et_pb_text_11 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_14 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_12 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_15 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_13 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_6 et_pb_row et_flex_row\"><div class=\"et_pb_column_16 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":5037,"parent":4970,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"dipi_cpt_category":[],"class_list":["post-5053","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>Open clusters &#183; Adriano Alfaro &#183; Astrophotography<\/title>\n<meta name=\"description\" content=\"An open cluster is a group of stars that formed together from the same giant molecular cloud and are still loosely bound by their mutual gravity.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.adrianoalfaro.com\/en\/astrophotography\/open-clusters\/\" \/>\n<meta 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