{"id":7714,"date":"2025-10-26T15:39:10","date_gmt":"2025-10-26T19:39:10","guid":{"rendered":"https:\/\/spacehaven.space\/spaces\/?post_type=portfolio_item&#038;p=7714"},"modified":"2026-01-01T12:45:02","modified_gmt":"2026-01-01T17:45:02","slug":"heart-nebula","status":"publish","type":"portfolio_item","link":"https:\/\/spacehaven.space\/spaces\/project\/heart-nebula\/","title":{"rendered":"Heart Nebula"},"content":{"rendered":"\n<style>\n\/* Hotspot positions for Flaming\/Heart field (portrait overlay) *\/\n\n.hs-ic1805{\n  \/* label on right edge of big circle *\/\n  left:62%;\n  top:35%;\n  width:14%;\n  height:6%;\n}\n\n.hs-ic1795{\n  \/* label above right of lower-right small circle *\/\n  left:39%;\n  top:73%;\n  width:14%;\n  height:6%;\n}\n\n.hs-ngc896{\n  \/* label above\/left of lower-left small circle *\/\n  left:30%;\n  top:80%;\n  width:14%;\n  height:6%;\n}\n<\/style>\n\n\n<!-- Controls -->\n<div class=\"astro-fullbleed\">\n\n  <div class=\"astro-controls\">\n    <label>\n      <input type=\"checkbox\" data-layer=\"ann\" checked>\n      Annotation\n    <\/label>\n    <label>\n      <input type=\"checkbox\" data-layer=\"grid\">\n      Grid\n    <\/label>\n    <label>\n      <input type=\"checkbox\" data-layer=\"stars\">\n      Stars\n    <\/label>\n\n    <button type=\"button\" class=\"astro-reset\">Reset<\/button>\n  <\/div>\n\n  <div class=\"astro-controls-instruction\">\n  (Tap controls above, explore labeled annotations below)\n<\/div>\n  <!-- Stage -->\n  <div class=\"astro-stage\">\n\n    <!-- SAME pixel dimensions for all files -->\n    <img decoding=\"async\" class=\"base\"\n         src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web.jpg\"\n         alt=\"Clean\" loading=\"eager\">\n\n    <img decoding=\"async\" class=\"ann\"\n         src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/annot_overlay-2.png\"\n         alt=\"Annotated\" loading=\"eager\">\n\n    <img decoding=\"async\" class=\"grid\"\n         src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/grid_overlay-2.png\"\n         alt=\"Grid\" loading=\"eager\">\n\n    <img decoding=\"async\" class=\"stars\"\n         src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/stars_overlay-2.png\"\n         alt=\"Stars\" loading=\"eager\">\n\n    <!-- CLICKABLE HOTSPOTS: Flaming field -->\n<a href=\"#ic1805\"  class=\"astro-hotspot hs-ic1805\"><\/a>\n<a href=\"#ic1795\"  class=\"astro-hotspot hs-ic1795\"><\/a>\n<a href=\"#ngc896\"  class=\"astro-hotspot hs-ngc896\"><\/a>\n\n\n  <\/div>\n<\/div>\n\n<script>\ndocument.addEventListener('DOMContentLoaded', () => {\n  const stage = document.querySelector('.astro-stage');\n  const controls = document.querySelector('.astro-controls');\n  if (!stage || !controls) return;\n\n  const checkboxes = controls.querySelectorAll('input[data-layer]');\n  const resetBtn  = controls.querySelector('.astro-reset');\n\n  function applyLayer(cb){\n    const layer = stage.querySelector('.' + cb.dataset.layer);\n    if (!layer) return;\n    layer.classList.toggle('hidden', !cb.checked);\n  }\n\n  \/\/ initialize and wire up\n  checkboxes.forEach(cb => applyLayer(cb));\n  checkboxes.forEach(cb => cb.addEventListener('change', () => applyLayer(cb)));\n\n  if (resetBtn) {\n    resetBtn.addEventListener('click', () => {\n      checkboxes.forEach(cb => { cb.checked = false; applyLayer(cb); });\n    });\n  }\n});\n<\/script>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\"><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\" id=\"ic1805\">IC 1805 \u2014 The Heart Nebula<\/h3>\n\n\n\n<p>The <strong>Heart Nebula (IC 1805)<\/strong> lies about <strong>7,500 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Light-year\" target=\"_blank\">light-years<\/a><\/strong> away in the constellation <strong>Cassiopeia<\/strong>, inside our own <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Milky_Way\" target=\"_blank\">Milky Way Galaxy<\/a><\/strong>. This vast <a href=\"https:\/\/en.wikipedia.org\/wiki\/H_II_region\" target=\"_blank\">H II region<\/a> glows in deep crimson <a href=\"https:\/\/en.wikipedia.org\/wiki\/H-alpha\" target=\"_blank\">H-alpha<\/a> light, sculpted by fierce winds from the massive stars of <strong>Melotte 15<\/strong>\u2014a young cluster at its center. The nebula\u2019s sweeping filaments and dark dust channels trace a heart-shaped outline spanning nearly 200 light-years across. Astronomers often call it a \u201cstellar nursery with a heartbeat.\u201d <br><br><em>Fun Fact:<\/em> The name \u201cHeart Nebula\u201d comes from its unmistakable shape in wide-field images. Its smaller companion, the <a href=\"#ic1795-details\">Soul Nebula (IC 1848)<\/a>, lies just to the east\u2014together forming the well-known \u201cHeart and Soul\u201d pair often captured in astrophotography mosaics.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Approximate Value<\/th><\/tr><\/thead><tbody><tr><td>Distance from Earth<\/td><td>\u2248 7,500 light-years<\/td><\/tr><tr><td>Apparent Size<\/td><td>\u2248 2\u00b0 \u00d7 2\u00b0 (4 \u00d7 Moon)<\/td><\/tr><tr><td>Physical Diameter<\/td><td>\u2248 200 light-years<\/td><\/tr><tr><td>Central Cluster<\/td><td>Melotte 15 (open cluster)<\/td><\/tr><tr><td>Dominant Emissions<\/td><td>H-\u03b1, [O III], [S II]<\/td><\/tr><tr><td>Estimated Age<\/td><td>\u2248 1.5 \u2013 3 million years<\/td><\/tr><tr><td>Number of Known YSOs<\/td><td>&gt; 400 (infrared surveys)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u2192 <a href=\"#ic1805-details\">Learn more \u203a<\/a><\/p>\n<\/div>\n\n\n\n<div id=\"ic1795\" class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">IC 1795 \u2014 Star-forming Region near the Heart<\/h3>\n\n\n\n<p><strong>IC 1795<\/strong>, just northwest of the <strong>Heart Nebula<\/strong>, is a smaller yet powerful star-forming region about <strong>7,500 light-years<\/strong> away in the <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Milky_Way\" target=\"_blank\">Milky Way Galaxy<\/a><\/strong>. Its energetic young stars illuminate dense hydrogen clouds with vivid red and teal glow, while dark dust lanes reveal the raw material of ongoing star birth. <\/p>\n\n\n\n<p><em>Fun Fact:<\/em> IC 1795\u2019s nickname, the \u201cFish Head Nebula,\u201d comes from its curved ridge and bright core that resembles the profile of a fish in long-exposure images.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-right\" data-align=\"right\">Parameter<\/th><th>Approximate Value<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-right\" data-align=\"right\">Distance from Earth<\/td><td>\u2248 7,500 light-years<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Region Type<\/td><td>Emission nebula \/ H II region<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Physical Extent<\/td><td>\u2248 50 light-years across<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Dominant Emissions<\/td><td>H-\u03b1, [O III], [S II]<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Age of Embedded Stars<\/td><td>\u2248 3 \u2013 5 million years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u2192 <a href=\"#ic1795-details\">Learn more \u203a<\/a><\/p>\n<\/div>\n\n\n\n<div id=\"ngc896\" class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">NGC 896 \u2014 Bright Western Region of the Heart Nebula<\/h3>\n\n\n\n<p><strong>NGC 896<\/strong> marks the bright western tip of the <strong>Heart Nebula (IC 1805)<\/strong> in <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cassiopeia_(constellation)\" target=\"_blank\">Cassiopeia<\/a><\/strong>, about 7,500 light-years away within the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Milky_Way\" target=\"_blank\">Milky Way<\/a>. It was the first part of the Heart Nebula ever discovered, shining in deep red hydrogen light with blue-green <a href=\"https:\/\/en.wikipedia.org\/wiki\/Doubly_ionized_oxygen\" target=\"_blank\">[O III]<\/a> accents. <\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-right\" data-align=\"right\">Parameter<\/th><th>Approximate Value<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-right\" data-align=\"right\">Distance from Earth<\/td><td>\u2248 7,500 light-years<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Association<\/td><td>Western edge of IC 1805 (Heart Nebula)<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Physical Size<\/td><td>\u2248 25 light-years across<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Dominant Emissions<\/td><td>H-\u03b1, [O III], [S II]<\/td><\/tr><tr><td class=\"has-text-align-right\" data-align=\"right\">Discovered by<\/td><td>William Herschel (1787)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u2192 <a href=\"#ngc896-details\">Learn more \u203a<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns astro-meta-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<h3 class=\"wp-block-heading\">Targets &amp; WCS<\/h3>\n\n\n\n<div class=\"wp-block-group astro-meta is-layout-flow wp-block-group-is-layout-flow\">\n<h4 class=\"wp-block-heading astro-meta__title\">Field &amp; Plate Solution<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Center (RA, Dec):<\/strong> (38.247, 61.477)<\/li>\n\n\n\n<li><strong>Center (RA, hms):<\/strong> 02h&nbsp;32m&nbsp;59.232s<\/li>\n\n\n\n<li><strong>Center (Dec, dms):<\/strong> +61\u00b0&nbsp;28&#8242;&nbsp;37.003&#8243;<\/li>\n\n\n\n<li><strong>Size:<\/strong> 2.03&nbsp;\u00d7&nbsp;2.92&nbsp;deg<\/li>\n\n\n\n<li><strong>Radius:<\/strong> 1.780&nbsp;deg<\/li>\n\n\n\n<li><strong>Pixel scale:<\/strong> 5.26&nbsp;arcsec\/pixel<\/li>\n\n\n\n<li><strong>Orientation:<\/strong> Up&nbsp;is&nbsp;215.9\u00b0&nbsp;E&nbsp;of&nbsp;N&nbsp;<em>(may be approximate)<\/em><\/li>\n<\/ul>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading astro-meta__title\">Mapping &amp; Constellations<\/h4>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"256\" height=\"128\" src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/11430385.png\" alt=\"\" class=\"wp-image-7860\" style=\"width:259px;height:auto\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"256\" height=\"256\" src=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/11430385-2.png\" alt=\"\" class=\"wp-image-7862\" style=\"width:260px;height:auto\" srcset=\"https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/11430385-2.png 256w, https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/11430385-2-150x150.png 150w\" sizes=\"auto, (max-width: 256px) 100vw, 256px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Equipment &amp; Integration<\/h3>\n\n\n\n<div class=\"wp-block-group astro-setup is-layout-flow wp-block-group-is-layout-flow\">\n<h4 class=\"wp-block-heading astro-setup__title\">Imaging Setup<\/h4>\n\n\n\n<ul class=\"wp-block-list astro-setup__list\">\n<li><strong>Scope:<\/strong> William Optics GRAN-TURISMO 81 IV<\/li>\n\n\n\n<li><strong>Camera:<\/strong> ZWO ASI2600MC Pro<\/li>\n\n\n\n<li><strong>Filters:<\/strong> Baader 3.5 \/ 4&nbsp;nm Ultra-Narrowband Filter-Set \u2013 CMOS-optimized (H-alpha \/ O-III \/ S-II)<\/li>\n\n\n\n<li><strong>Mount:<\/strong> iOptron CEM120EC2<\/li>\n\n\n\n<li><strong>Guiding:<\/strong> ZWO ASI290MM Mini Camera, WO UniGuide 50 mm f\/4.0&nbsp;scope<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group astro-integration is-layout-flow wp-block-group-is-layout-flow\">\n<h4 class=\"wp-block-heading astro-integration__title\">Integration<\/h4>\n\n\n\n<ul class=\"wp-block-list astro-integration__list\">\n<li><strong>H\u03b1:<\/strong> 45 \u00d7 300 s = 3 h 45 m<\/li>\n\n\n\n<li><strong>O III:<\/strong> 45 \u00d7 300 s = 3 h 45 m<\/li>\n\n\n\n<li><strong>S II:<\/strong> 45 \u00d7 300 s = 3 h 45 m<\/li>\n\n\n\n<li><strong>Total:<\/strong> 11 h 15 m<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group astro-notes has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">Notes \/ Processing<\/h3>\n\n\n\n<p>Stacking was performed using&nbsp;<a>Astro Pixel Processor<\/a>, which handled calibration and initial integration of the data while producing individual stretched channels for H-alpha, S II, and O III. Star reduction was completed with&nbsp;<a>StarNet v2<\/a>&nbsp;to isolate nebular detail and better emphasize the main structures. The combined processing was carried out in&nbsp;<strong>Affinity Photo<\/strong>&nbsp;using its dedicated astrophotography tools, along with&nbsp;<strong>James Riston\u2019s<\/strong>&nbsp;macro toolset for enhanced workflow control. The three channels were merged and color-mapped in the&nbsp;<strong>Hubble Palette (SHO)<\/strong>, followed by additional stretching and refinement of each channel. Final steps included targeted noise reduction, sharpening, and overall tonal balancing\u2014adjusting brightness, contrast, and color balance\u2014to produce the finished image.<\/p>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"ic1805-details\" class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">IC 1805 \u2014 Detailed Description &amp; Further Reading<\/h3>\n\n\n\n<p>The <strong>Heart Nebula (IC 1805)<\/strong> is one of the largest and most luminous <a href=\"https:\/\/en.wikipedia.org\/wiki\/H_II_region\" target=\"_blank\" rel=\"noreferrer noopener\">H II regions<\/a> in the Milky Way. Located in the Perseus spiral arm, it spans about <strong>200 light-years<\/strong> and glows primarily in <a href=\"https:\/\/en.wikipedia.org\/wiki\/H-alpha\" target=\"_blank\" rel=\"noreferrer noopener\">H-alpha<\/a>, with secondary emissions from <a href=\"https:\/\/en.wikipedia.org\/wiki\/Doubly_ionized_oxygen\" target=\"_blank\" rel=\"noreferrer noopener\">[O III]<\/a> and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Singly_ionized_sulfur\" target=\"_blank\" rel=\"noreferrer noopener\">[S II]<\/a>. At its core lies the open cluster <strong>Melotte 15<\/strong>, whose massive O- and B-type stars are only a few million years old. Their ultraviolet radiation ionizes surrounding gas and drives strong stellar winds that sculpt the intricate pillars and cavities visible in narrowband images.<\/p>\n\n\n\n<p>The Heart Nebula is part of a larger star-forming complex that includes the nearby <a href=\"#ic1795-details\">IC 1795<\/a> and <a href=\"#ngc896-details\">NGC 896<\/a> regions. Together they form an extended cloud nearly 300 light-years wide. Observations with <a href=\"https:\/\/www.nasa.gov\/mission_pages\/spitzer\/main\/index.html\" target=\"_blank\" rel=\"noreferrer noopener\">Spitzer<\/a> and <a href=\"https:\/\/www.esa.int\/Science_Exploration\/Space_Science\/Herschel\" target=\"_blank\" rel=\"noreferrer noopener\">Herschel<\/a> have revealed hundreds of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Young_stellar_object\" target=\"_blank\" rel=\"noreferrer noopener\">young stellar objects (YSOs)<\/a>, showing that the nebula\u2019s next generation of stars is already forming along its glowing ridges.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Heart_Nebula\" target=\"_blank\" rel=\"noreferrer noopener\">Heart Nebula \u2014 Wikipedia<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/apod.nasa.gov\/apod\/ap230209.html\" target=\"_blank\" rel=\"noreferrer noopener\">NASA APOD: The Heart of the Heart Nebula<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/skyandtelescope.org\/astronomy-resources\/observe-the-heart-nebula\/\" target=\"_blank\" rel=\"noreferrer noopener\">Sky &amp; Telescope Guide<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n<div id=\"ic1795-details\" class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">IC 1795 \u2014 Detailed Description &amp; Further Reading<\/h3>\n\n\n\n<p><strong>IC 1795<\/strong> is an emission nebula and star-forming region bordering the western side of the <a href=\"#ic1805-details\">Heart Nebula (IC 1805)<\/a>. Also known as the \u201cFish Head Nebula,\u201d it is energized by hot O-type stars whose ultraviolet radiation ionizes surrounding hydrogen gas. The area contains several compact H II pockets and embedded <a href=\"https:\/\/en.wikipedia.org\/wiki\/Young_stellar_object\" target=\"_blank\" rel=\"noreferrer noopener\">young stellar objects<\/a>, representing a slightly older generation than the Heart\u2019s cluster.<\/p>\n\n\n\n<p><em>Fun Fact:<\/em> IC 1795\u2019s nickname, the \u201cFish Head Nebula,\u201d comes from its curved ridge and bright core that resembles the profile of a fish in long-exposure images.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/IC_1795\" target=\"_blank\" rel=\"noreferrer noopener\">IC 1795 \u2014 Wikipedia<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/apod.nasa.gov\/apod\/ap240117.html\" target=\"_blank\" rel=\"noreferrer noopener\">NASA APOD: Fish Head Nebula (IC 1795)<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n<div id=\"ngc896-details\" class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">NGC 896 \u2014 Detailed Description &amp; Further Reading<\/h3>\n\n\n\n<p><strong>NGC 896<\/strong> is the luminous western lobe of the Heart Nebula complex and the first portion cataloged in the 19th century. It is a region of intense star formation where radiation from young hot stars ionizes dense gas clouds, creating bright H-alpha filaments. Infrared and radio observations show shock fronts and molecular knots where new protostars continue to emerge.<\/p>\n\n\n\n<p><em>Fun Fact:<\/em> NGC 896 was discovered before the rest of the Heart Nebula and originally thought to be an isolated object; only later imaging revealed it as part of the larger IC 1805 complex.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/NGC_896\" target=\"_blank\" rel=\"noreferrer noopener\">NGC 896 \u2014 Wikipedia<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/apod.nasa.gov\/apod\/ap200111.html\" target=\"_blank\" rel=\"noreferrer noopener\">NASA APOD: The Heart and Soul Nebulae<\/a><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Annotation Grid Stars Reset (Tap controls above, explore labeled annotations below) IC 1805 \u2014 The Heart Nebula The Heart Nebula (IC 1805) lies about 7,500 light-years away in the constellation Cassiopeia, inside our own Milky Way Galaxy. This vast H II region glows in deep crimson H-alpha light, sculpted by fierce winds from the massive &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/spacehaven.space\/spaces\/project\/heart-nebula\/\" class=\"more-link\">Read more<span class=\"screen-reader-text\"> &#8220;Heart Nebula&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":7718,"parent":0,"template":"","meta":{"_wpzb_portfolio_video_type":"","_wpzb_portfolio_video_id":0,"_wpzb_portfolio_video_url":"","footnotes":""},"portfolio":[60,59],"class_list":["post-7714","portfolio_item","type-portfolio_item","status-publish","has-post-thumbnail","hentry","portfolio-astrophoto","portfolio-nebula"],"featured_media_urls":{"thumbnail":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-150x150.jpg",150,150,true],"medium":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-208x300.jpg",208,300,true],"medium_large":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web.jpg",768,1107,false],"large":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-711x1024.jpg",711,1024,true],"1536x1536":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1066x1536.jpg",1066,1536,true],"2048x2048":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web.jpg",1388,2000,false],"ultp_layout_landscape_large":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1200x800.jpg",1200,800,true],"ultp_layout_landscape":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-870x570.jpg",870,570,true],"ultp_layout_portrait":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-600x900.jpg",600,900,true],"ultp_layout_square":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-600x600.jpg",600,600,true],"inspiro-featured-image":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web.jpg",1388,2000,false],"inspiro-loop":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-950x320.jpg",950,320,true],"inspiro-loop@2x":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1388x640.jpg",1388,640,true],"portfolio_item-thumbnail":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-600x400.jpg",600,400,true],"portfolio_item-thumbnail@2x":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1200x800.jpg",1200,800,true],"portfolio_item-masonry":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-600x865.jpg",600,865,true],"portfolio_item-masonry@2x":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1200x1729.jpg",1200,1729,true],"portfolio_item-thumbnail_cinema":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-800x335.jpg",800,335,true],"portfolio_item-thumbnail_portrait":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-600x900.jpg",600,900,true],"portfolio_item-thumbnail_portrait@2x":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-1200x1800.jpg",1200,1800,true],"portfolio_item-thumbnail_square":["https:\/\/spacehaven.space\/spaces\/wp-content\/uploads\/2025\/10\/Heart-Nebula-IC1805-Ha3.5-final-for-web-800x800.jpg",800,800,true]},"_links":{"self":[{"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/portfolio_item\/7714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/portfolio_item"}],"about":[{"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/types\/portfolio_item"}],"author":[{"embeddable":true,"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":14,"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/portfolio_item\/7714\/revisions"}],"predecessor-version":[{"id":8287,"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/portfolio_item\/7714\/revisions\/8287"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/media\/7718"}],"wp:attachment":[{"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/media?parent=7714"}],"wp:term":[{"taxonomy":"portfolio","embeddable":true,"href":"https:\/\/spacehaven.space\/spaces\/wp-json\/wp\/v2\/portfolio?post=7714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}