{"id":80692,"date":"2026-07-02T01:34:39","date_gmt":"2026-07-02T05:34:39","guid":{"rendered":"https:\/\/world.edu\/?p=80692"},"modified":"2026-07-02T01:34:39","modified_gmt":"2026-07-02T05:34:39","slug":"the-death-of-a-star-is-not-the-end-a-new-discovery-reveals-what-will-happen-when-the-sun-dies","status":"publish","type":"post","link":"https:\/\/world.edu\/the-death-of-a-star-is-not-the-end-a-new-discovery-reveals-what-will-happen-when-the-sun-dies\/","title":{"rendered":"The death of a star is not the end: a new discovery reveals what will happen when the Sun dies"},"content":{"rendered":"<p><span dir=\"auto\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-large\" src=\"https:\/\/world.edu\/wp-content\/uploads\/2026\/07\/death-of-the-Sun-1.jpg\" width=\"680\" height=\"382\" \/><\/span><\/p>\n<p><span dir=\"auto\">The death of the Sun is a distant but inevitable event. Understanding what will happen when our star runs out of fuel is one of the great questions of modern astronomy; its end determines the fate of the Solar System, and that of Earth.<\/span><\/p>\n<p><span dir=\"auto\">Now, a\u00a0<\/span><a href=\"https:\/\/dx.doi.org\/10.1038\/s41586-026-10514-7\"><span dir=\"auto\">new study from the University of St Andrews (UK), published <\/span><em><span dir=\"auto\">in Nature<\/span><\/em><\/a><span dir=\"auto\">\u00a0, offers one of the clearest clues to date. Thanks to observations from the\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Telescopio_espacial_James_Webb\"><span dir=\"auto\">James Webb Space Telescope<\/span><\/a><span dir=\"auto\">\u00a0, an international team of astronomers has observed a giant planet orbiting a\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Enana_blanca\"><span dir=\"auto\">white dwarf<\/span><\/a><span dir=\"auto\">\u00a0and has managed to reconstruct its history. The result suggests that the death of a star does not necessarily mean the end of all the planets in the solar system.<\/span><\/p>\n<h4><strong><span dir=\"auto\">The future of the Sun<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">In about 5 billion years, the Sun will exhaust the hydrogen in its core. From that moment on, it will become a\u00a0<\/span><a href=\"https:\/\/www.sea-astronomia.es\/glosario\/gigante-roja\"><span dir=\"auto\">red giant<\/span><\/a><span dir=\"auto\">\u00a0, increasing in size more than a hundred times its current size.<\/span><\/p>\n<p><span dir=\"auto\">Mercury and\u00a0<\/span><a href=\"https:\/\/theconversation.com\/de-verdad-venus-podria-albergar-vida-146184\"><span dir=\"auto\">Venus<\/span><\/a><span dir=\"auto\">\u00a0will almost certainly disappear. Earth could suffer the same fate. Afterward, the Sun&#8217;s outer layers will be ejected into space, leaving only its core: a\u00a0<\/span><a href=\"https:\/\/theconversation.com\/que-nos-revela-el-estudio-de-las-enanas-blancas-acerca-de-nuestra-galaxia-176334\"><span dir=\"auto\">white dwarf<\/span><\/a><span dir=\"auto\">\u00a0, an object about the size of our planet but enormously massive, with nearly half the Sun&#8217;s current mass concentrated in a tiny volume.<\/span><\/p>\n<p><span dir=\"auto\">What the new study reveals is that the most distant planets, such as Jupiter, Saturn, Uranus, or Neptune, could survive the cataclysm.<\/span><\/p>\n<h4><strong><span dir=\"auto\">A planet around a dead star<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">The key to the study is\u00a0<\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/WD_1856%2B534_b\"><span dir=\"auto\">WD 1856 b<\/span><\/a><span dir=\"auto\">\u00a0, a giant\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Exoplaneta\"><span dir=\"auto\">exoplanet<\/span><\/a><span dir=\"auto\">\u00a0located about 80 light-years from Earth. It is similar in size to\u00a0<\/span><a href=\"https:\/\/theconversation.com\/desvelan-que-la-gran-mancha-roja-de-jupiter-tiene-el-tamano-de-la-tierra-y-se-formo-hace-190-anos-232621\"><span dir=\"auto\">Jupiter<\/span><\/a><span dir=\"auto\">\u00a0, but between four and eleven times more massive. Most surprising is that it orbits a white dwarf every 1.4 days at a distance of just 0.02\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Unidad_astron%C3%B3mica\"><span dir=\"auto\">astronomical units<\/span><\/a><span dir=\"auto\">\u00a0(or 0.02 times the distance between the Sun and Earth, which is about 3 million kilometers). This orbit seems impossible.<\/span><\/p>\n<p>When the parent star went through its red giant phase, it occupied a region much larger than the planet&#8217;s current orbit. If WD 1856 b had always been there, it would have been destroyed.<\/p>\n<p><span dir=\"auto\">For years astronomers debated two possibilities. The first was that the planet had survived inside the red giant&#8217;s envelope. The second was that it was initially much farther out and migrated inward after the star&#8217;s death.<\/span><\/p>\n<h4><strong><span dir=\"auto\">The accuracy of the James Webb Space Telescope<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">To solve the mystery, researchers used the\u00a0<\/span><a href=\"https:\/\/www.esa.int\/Space_in_Member_States\/Spain\/Como_el_instrumento_NIRSpec_de_Webb_ha_abierto_200_ventanas_hacia_nuestros_origenes\"><span dir=\"auto\">NIRSpec spectrograph<\/span><\/a><span dir=\"auto\">\u00a0on the James Webb Space Telescope during one of the planet&#8217;s brief\u00a0<\/span><a href=\"https:\/\/theconversation.com\/podrian-los-extraterrestres-detectar-la-tierra-por-el-metodo-de-los-transitos-201969\"><span dir=\"auto\">astronomical transits<\/span><\/a><span dir=\"auto\">\u00a0in front of the white dwarf. The phenomenon lasts a mere eight minutes, which gives an idea of \u200b\u200bthe precision required to obtain the data.<\/span><\/p>\n<h4><strong><span dir=\"auto\">A carbon-rich atmosphere<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">The observations revealed something unexpected: the\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Atm%C3%B3sfera_planetaria\"><span dir=\"auto\">planetary atmosphere<\/span><\/a><span dir=\"auto\">\u00a0contains hydrocarbons, probably\u00a0<\/span><a href=\"https:\/\/theconversation.com\/la-pista-del-metano-para-encontrar-vida-en-el-subsuelo-de-marte-248335\"><span dir=\"auto\">methane<\/span><\/a><span dir=\"auto\">\u00a0, in addition to\u00a0<\/span><a href=\"https:\/\/theconversation.com\/descubierto-un-nuevo-exoplaneta-de-mananas-nubladas-y-tardes-despejadas-283197\"><span dir=\"auto\">hazes and clouds<\/span><\/a><span dir=\"auto\">\u00a0. The analysis suggests a remarkably high\u00a0<\/span><a href=\"https:\/\/theconversation.com\/el-extrano-descubrimiento-que-podria-cambiar-lo-que-sabemos-sobre-exoplanetas-oceanicos-283615\"><span dir=\"auto\">abundance of carbon<\/span><\/a><span dir=\"auto\">\u00a0. This is the first time the atmosphere of a planet orbiting a dead star has been characterized.<\/span><\/p>\n<p><span dir=\"auto\">This chemical richness is especially interesting because it provides clues about the planet&#8217;s history. Some of this material may have been incorporated during its formation, although it is also possible that it accumulated carbon-rich compounds over billions of years of evolution.<\/span><\/p>\n<p><span dir=\"auto\">But the most important discovery was another. The planet has a temperature of about 400\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Kelvin\"><span dir=\"auto\">Kelvin<\/span><\/a><span dir=\"auto\">\u00a0(approximately 127 \u00b0C), much higher than the 160 Kelvin it should have if it only received energy from the faint white dwarf.<\/span><\/p>\n<h4><strong><span dir=\"auto\">A reconstruction spanning billions of years<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">Gas giants cool in a predictable way over time. Using\u00a0<\/span><a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/0004-637X\/729\/1\/32\"><span dir=\"auto\">planetary cooling models<\/span><\/a><span dir=\"auto\">\u00a0, researchers reconstructed the thermal history of WD 1856 and calculated when the warming event must have occurred.<\/span><\/p>\n<p><span dir=\"auto\">The answer was surprising: the warming occurred between 3 and 5.5 billion years after the star had already become a white dwarf.<\/span><\/p>\n<p><span dir=\"auto\">That result practically rules out the possibility that the planet survived inside the red giant. If that had happened, the warming would have coincided with the star&#8217;s death.<\/span><\/p>\n<p><span dir=\"auto\">Instead, the most likely explanation is that the planet remained in a safe, distant orbit for billions of years. Only much later did a\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Migraci%C3%B3n_planetaria\"><span dir=\"auto\">planetary migration<\/span><\/a><span dir=\"auto\">\u00a0process , driven by gravitational interactions, alter its trajectory. During that process,\u00a0<\/span><a href=\"https:\/\/es.wikipedia.org\/wiki\/Fuerza_de_marea\"><span dir=\"auto\">tidal forces<\/span><\/a><span dir=\"auto\">\u00a0generated enormous amounts of heat within the planet.<\/span><\/p>\n<h4><strong><span dir=\"auto\">The \u201cto be continued\u201d of the solar system<\/span><\/strong><\/h4>\n<p><span dir=\"auto\">The discovery shows that the evolution of a planetary system does not end when its star dies. In fact, it can continue for billions of years. Surviving gas giants can change orbits, undergo gravitational encounters, and even migrate toward the stellar remnant long after the original star&#8217;s demise.<\/span><\/p>\n<p><span dir=\"auto\">We don&#8217;t know if something similar will happen in our solar system. But WD 1856 b shows that Jupiter and the other gas giants could have a much longer and more complex history than we imagined.<\/span><\/p>\n<p><span dir=\"auto\">For the first time, astronomers have observed a possible future for the solar system and managed to reconstruct it. And what they have discovered is that the death of the Sun may not be the end of the story, but the beginning of a new chapter.<\/span><\/p>\n<p><em><strong>Author Bio:<\/strong> Carlos V\u00e1zquez Monz\u00f3n is an Assistant Professor, PhD, specializing in Astrophysics and Astrodynamics at Loyola University Andalusia<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The death of the Sun is a distant but inevitable event. Understanding what will happen when our star runs out of fuel is one of the great questions of modern astronomy; its end determines the fate of the Solar System, and that of Earth. Now, a\u00a0new study from the University of St Andrews (UK), published [&hellip;]\n&hellip; <a href=\"https:\/\/world.edu\/the-death-of-a-star-is-not-the-end-a-new-discovery-reveals-what-will-happen-when-the-sun-dies\/\" class=\"more\">learn more&rarr;<\/a><\/p>","protected":false},"author":33,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59],"tags":[2160],"coauthors":[11733],"class_list":["post-80692","post","type-post","status-publish","format-standard","hentry","category-science-tech","tag-solar-system"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The death of a star is not the end: a new discovery reveals what will happen when the Sun dies - World leading higher education information and services<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/world.edu\/the-death-of-a-star-is-not-the-end-a-new-discovery-reveals-what-will-happen-when-the-sun-dies\/\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:locale\" content=\"en_US\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:type\" content=\"article\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:title\" content=\"The death of a star is not the end: a new discovery reveals what will happen when the Sun dies - World leading higher education information and services\" class=\"yoast-seo-meta-tag\" \/>\n<meta property=\"og:description\" content=\"The death of the Sun is a distant but inevitable event. Understanding what will happen when our star runs out of fuel is one of the great questions of modern astronomy; its end determines the fate of the Solar System, and that of Earth. 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