{"id":882420,"date":"2026-10-14T21:12:14","date_gmt":"2026-10-14T21:12:14","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/882420\/"},"modified":"2026-10-14T21:12:14","modified_gmt":"2026-10-14T21:12:14","slug":"the-suns-death-could-tear-apart-the-outer-solar-system-much-sooner-than-thought","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/882420\/","title":{"rendered":"The Sun\u2019s Death Could Tear Apart the Outer Solar System Much Sooner Than Thought"},"content":{"rendered":"

Our Sun is just like any other star. That is, eventually the Sun will run out of fuel and effectively collapse\u2014taking out, presumably, most things in our neighborhood. That won\u2019t pose a problem for those of us alive right now, but for those of you who still care: Scientists think the doomsday for outer planets might come earlier than expected.<\/p>\n

New calculations indicate that, once the Sun transforms into a white dwarf some 7 to 8 billion years from now, the outer solar system has roughly 1 billion years left\u2014much lower than previous estimates ranging from 100 billion to a whopping 1 quintillion years, according to a recent study published in The Astrophysical Journal Letters<\/a>. The latter number was so large as it assumed the Sun would lose its mass in a relatively smooth manner, Konstantin Batygin<\/a>, the study\u2019s first author, explained to Gizmodo. In reality, the Sun\u2019s death will likely be bumpier, which introduces more chaos to the equation.<\/p>\n

\u201cWhat we\u2019ve shown is that this timeline [of 1 quintillion years] gets front-run by the Sun\u2019s own death,\u201d said Batygin, an astrophyscist at the California Institute of Technology. \u201cBecause planetary dynamics is chaotic\u2014exhibiting sensitive dependence on initial conditions\u2014no single simulation tells you what will happen, only what could happen.\u201d<\/p>\n

Cosmic traffic <\/p>\n

According to Batygin, the stability of the solar system depends on whether its planets travel in \u201cwell-ordered, non-intersecting orbits\u201d on astronomical timescales. This is determined by factors such as the spacing between orbits or the web of orbital resonance<\/a> among the planets. It\u2019s also a physics question with a long history; Isaac Newton himself wondered<\/a> if gravity would eventually make planetary orbits fall apart.<\/p>\n

Physicists have since sort of answered Newton\u2019s question\u2014sort of, because new insights into the stability of our solar system appear to raise new questions. This is something that has become extremely clear to Batygin, who has explored<\/a> this topic for decades.<\/p>\n

There\u2019s that overarching question, then the smaller question(s) on different dynamics for the inner and outer planets. This particular study obviously focuses on the latter, and if we ignore astrophysical processes\u2014and that\u2019s a huge if\u2014the outer solar system is \u201cremarkably stable,\u201d he added. That was why scientists predicted<\/a> it would take 1 quintillion (that\u2019s a 1 followed by 18 zeros) years for chaotic diffusion to put Uranus out of commission. That\u2019s even longer than the current age of our universe.<\/p>\n

Terminal instability <\/p>\n

But again, that rests on a pretty gigantic \u201cif,\u201d and once real astrophysical chaos enters the scene, this picture \u201cfails at its foundation,\u201d as the team wrote in the paper. Namely, as the Sun approaches the end of its stellar lifetime, it won\u2019t be losing its mass in neat packets of star stuff. It\u2019s much more realistic to assume that it\u2019ll do so via episodic ejections over time.<\/p>\n

And this irregular shaking will quickly destabilize the orbits of larger planets within a billion years of the Sun\u2019s transformation into a white dwarf, Batygin explained. To test their own hypothesis, Batygin and colleagues ran large sets of different simulations that treated the solar system\u2019s instability as a \u201cprobability rather than a definitive forecast,\u201d he added.<\/p>\n

\"PostExamples of orbital changes due to the Sun losing mass as it evolves into a white dwarf. \u00a9 Batygin et al., 2026 <\/p>\n

The team evaluated 672 scenarios, tracking when and how much the Sun could lose its mass on its way to becoming a white dwarf. The tests included instances in which the Sun did smoothly shed its mass. Even so, around 96% of these hypothetical planetary systems spiraled into chaos within 3 billion years of the Sun becoming a white dwarf.<\/p>\n

\u201cIn short: as the Sun dies, it will take the outer solar system down with it,\u201d Batygin explained. \u201cThe Sun\u2019s death is not an event the planets will quietly survive\u2014it is the trigger for their orbital undoing.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"Our Sun is just like any other star. That is, eventually the Sun will run out of fuel…\n","protected":false},"author":2,"featured_media":882421,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[8149,16492,79,780],"class_list":["post-882420","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-astrophysics","tag-planetary-science","tag-science","tag-solar-system"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/882420","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=882420"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/882420\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/882421"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=882420"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=882420"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=882420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}