{"id":14862,"date":"2025-09-30T17:00:00","date_gmt":"2025-09-30T15:00:00","guid":{"rendered":"https:\/\/holistic.news\/en\/?p=14862"},"modified":"2025-09-30T11:08:56","modified_gmt":"2025-09-30T09:08:56","slug":"stellar-collision-revealed","status":"publish","type":"post","link":"https:\/\/holistic.news\/en\/stellar-collision-revealed\/","title":{"rendered":"Stellar collision revealed. Hubble rewrites history"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">In space, things aren\u2019t always what they seem<\/h2>\n\n\n\n<p>Sometimes astronomy demands a fresh look at familiar objects. Recent findings are a case in point: an international team has shown that <strong>even the brightest stars can hide a dark past<\/strong>. Can a head-on crash between two stars produce a third, even more massive object?<\/p>\n\n\n\n<p><em>\u201cThis discovery underscores that things may not be what they seem at first glance,\u201d<\/em> explains Boris Gaensicke of the University of Warwick, a Hubble program scientist. The star in question is WD 0525+526, located about 128 light-years from Earth \u2014 relatively close on cosmic scales.<em> \u201c<strong>It looked like a normal white dwarf<\/strong>, but Hubble\u2019s ultraviolet observations revealed it had a very different history than we might have expected,\u201d<\/em> Gaensicke adds in a <a href=\"https:\/\/science.nasa.gov\/missions\/hubble\/nasas-hubble-uncovers-rare-white-dwarf-merger-remnant\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">NASA<\/a> press release.<\/p>\n\n\n\n<p>A white dwarf is an Earth-sized, ultra-dense stellar remnant \u2014 the end state for stars not massive enough to explode as supernovae. Our Sun faces that fate in about 5 billion years. This target appeared to be another routine example, but its true story is far more complicated.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Stellar collision: the carbon clue<\/h2>\n\n\n\n<p>In theory, a white dwarf can reach up to about 1.4 times the mass of the Sun, and heavier specimens do turn up. These ultramassive objects can form either from a single massive star\u2019s evolution or <strong>from the merger of a white dwarf with another star<\/strong>.<\/p>\n\n\n\n<p>WD 0525+526 weighs in at roughly 1.2 times the Sun\u2019s mass \u2014 about 20 percent more massive than the Sun. In visible light, its spectrum looked normal. Only Hubble\u2019s ultraviolet view <strong>uncovered carbon in its atmosphere \u2014 an unexpected ingredient that betrays a turbulent past<\/strong>.<\/p>\n\n\n\n<p>Typical white dwarfs have atmospheres made of hydrogen and helium. Carbon in the spectrum points to a more violent origin:<strong> either a collision of two white dwarfs or a white dwarf merging with a subgiant star<\/strong>. <em>\u201cHubble\u2019s COS (Cosmic Origins Spectrograph) is the only instrument capable of delivering the high-quality ultraviolet spectroscopy needed to detect carbon in this white dwarf\u2019s atmosphere,\u201d<\/em> says lead author Snehalata Sahu of the University of Warwick.<\/p>\n\n\n\n<p><strong>You might like to see<\/strong> <a href=\"https:\/\/holistic.news\/en\/what-is-a-quasi-moon\/\" target=\"_blank\" rel=\"noreferrer noopener\">What Is a Quasi-Moon?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How many stars are crash survivors?<\/h2>\n\n\n\n<p>This object stands out even among the rare remnants born of stellar smashups.<strong> With a temperature near 21,000 kelvin and a mass about 1.2 times the Sun\u2019s, it is hotter and heftier than other known cases.<\/strong><\/p>\n\n\n\n<p>The finding raises a bigger question: <strong>how many seemingly \u201cnormal\u201d white dwarfs are actually products of catastrophic mergers?<\/strong> <em>\u201cWe want to expand our survey to learn how common carbon-rich white dwarfs are among similar objects, and how many stellar collision remnants are hiding in the ordinary white-dwarf population,\u201d<\/em> says co-author Antoine Bedrad of the University of Warwick.<\/p>\n\n\n\n<p>A star once written off as routine now appears to be the aftermath of a stellar collision, just 128 light-years away. As Hubble continues to sift the ultraviolet clues, more hidden merger survivors may surface \u2014 and each will refine how we think Sun-like stars live and die.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><em>Read this article in Polish: <\/em><a href=\"https:\/\/holistic.news\/zderzenie-dwoch-gwiazd\/\" target=\"_blank\" rel=\"noreferrer noopener\">Mia\u0142 by\u0107 zwyk\u0142\u0105 gwiazd\u0105. Teleskop Hubble\u2019a pokaza\u0142 co\u015b innego<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For years it looked like an ordinary dying star. Now the Hubble Space Telescope has revealed that this object \u2014 just 128 light-years from Earth \u2014 formed in a stellar collision between two stars. The discovery reshapes our understanding of how Sun-like stars evolve.<\/p>\n","protected":false},"author":275,"featured_media":14863,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[435],"tags":[1300,1290,1214,1861,1677,1303,1299,1302,1860],"class_list":["post-14862","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-astronomy","tag-cosmology","tag-cosmos","tag-hubble-space-telescope","tag-space-research","tag-stars","tag-supernova","tag-universe","tag-white-dwarf"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Stellar-collision-revealed-Hubble-rewrites-history<\/title>\n<meta name=\"description\" content=\"Stellar collision just 128 light-years away: Hubble shows a \u201cnormal\u201d white dwarf was forged by two stars merging, reshaping how Sun-like stars evolve.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/holistic.news\/en\/stellar-collision-revealed\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stellar-collision-revealed-Hubble-rewrites-history\" \/>\n<meta property=\"og:description\" content=\"Stellar collision just 128 light-years away: Hubble shows a \u201cnormal\u201d white dwarf was forged by two stars merging, reshaping how Sun-like stars evolve.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/holistic.news\/en\/stellar-collision-revealed\/\" \/>\n<meta property=\"og:site_name\" content=\"Holistic News\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/portalHolisticNews\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-30T15:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/holistic.news\/en\/wp-content\/uploads\/2025\/09\/stellar-collision.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Maciej Bartusik\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@news_holistic\" \/>\n<meta name=\"twitter:site\" content=\"@news_holistic\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Maciej Bartusik\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/stellar-collision-revealed\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/stellar-collision-revealed\\\/\"},\"author\":{\"name\":\"Maciej Bartusik\",\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/#\\\/schema\\\/person\\\/0758fb0cf338b71ce51e2da415bc266c\"},\"headline\":\"Stellar collision revealed. 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