{"id":135400,"date":"2026-05-21T07:20:38","date_gmt":"2026-05-21T10:20:38","guid":{"rendered":"https:\/\/ubirataonline.com.br\/neptune-moon-could-be-only-intact-survivor-from-ancient-collision\/"},"modified":"2026-05-21T07:20:41","modified_gmt":"2026-05-21T10:20:41","slug":"neptune-moon-could-be-only-intact-survivor-from-ancient-collision","status":"publish","type":"post","link":"https:\/\/ubirataonline.com.br\/en\/neptune-moon-could-be-only-intact-survivor-from-ancient-collision\/","title":{"rendered":"Neptune moon could be only intact survivor from ancient collision"},"content":{"rendered":"<p><\/p>\n<div data-editable=\"content\" itemprop=\"articleBody\" data-reorderable=\"content\">\n<div data-editable=\"aiSummary\" class=\"article__ai-summary-wrapper\">\n<div data-uri=\"cms.cnn.com\/_components\/ai-article-summary\/instances\/cmpecqeof00043b6r3916vftm@published\" class=\"ai-article-summary hidden\" data-article-gutter=\"true\" data-selector-brand=\"accent-ai\">\n    <button class=\"ai-article-summary__toggle\"><br \/>\n        <strong class=\"ai-article-summary__title\"><br \/>\n            <span class=\"ai-article-summary__stars-icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\">\n    <path d=\"M16.7322 12.6297L14.7237 12.0545C13.8192 11.7989 12.9952 11.315 12.3307 10.6491C11.6662 9.98311 11.1834 9.15741 10.9284 8.25095L10.3544 6.23807C10.3255 6.16765 10.2764 6.10741 10.2133 6.06502C10.1502 6.02263 10.076 6 10 6C9.92403 6 9.84978 6.02263 9.78667 6.06502C9.72357 6.10741 9.67446 6.16765 9.6456 6.23807L9.07163 8.25095C8.81662 9.15741 8.33377 9.98311 7.66926 10.6491C7.00476 11.315 6.18084 11.7989 5.27634 12.0545L3.26781 12.6297C3.19069 12.6516 3.12281 12.6982 3.07448 12.7623C3.02615 12.8264 3 12.9045 3 12.9848C3 13.0652 3.02615 13.1433 3.07448 13.2074C3.12281 13.2715 3.19069 13.3181 3.26781 13.34L5.27634 13.9152C6.18084 14.1708 7.00476 14.6547 7.66926 15.3206C8.33377 15.9866 8.81662 16.8123 9.07163 17.7187L9.6456 19.7316C9.66749 19.8089 9.71393 19.8769 9.77789 19.9254C9.84185 19.9738 9.91983 20 10 20C10.0802 20 10.1581 19.9738 10.2221 19.9254C10.2861 19.8769 10.3325 19.8089 10.3544 19.7316L10.9284 17.7187C11.1834 16.8123 11.6662 15.9866 12.3307 15.3206C12.9952 14.6547 13.8192 14.1708 14.7237 13.9152L16.7322 13.34C16.8093 13.3181 16.8772 13.2715 16.9255 13.2074C16.9738 13.1433 17 13.0652 17 12.9848C17 12.9045 16.9738 12.8264 16.9255 12.7623C16.8772 12.6982 16.8093 12.6516 16.7322 12.6297Z\" fill=\"currentColor\"\/>\n    <path d=\"M19.8852 5.84129L19.0244 5.59477C18.6368 5.48524 18.2837 5.27786 17.9989 4.99245C17.7141 4.70705 17.5072 4.35317 17.3979 3.96469L17.1519 3.10203C17.1395 3.07185 17.1185 3.04603 17.0914 3.02787C17.0644 3.0097 17.0326 3 17 3C16.9674 3 16.9356 3.0097 16.9086 3.02787C16.8815 3.04603 16.8605 3.07185 16.8481 3.10203L16.6021 3.96469C16.4928 4.35317 16.2859 4.70705 16.0011 4.99245C15.7163 5.27786 15.3632 5.48524 14.9756 5.59477L14.1148 5.84129C14.0817 5.85069 14.0526 5.87064 14.0319 5.89811C14.0112 5.92558 14 5.95907 14 5.9935C14 6.02794 14.0112 6.06143 14.0319 6.0889C14.0526 6.11637 14.0817 6.13632 14.1148 6.14572L14.9756 6.39224C15.3632 6.50176 15.7163 6.70915 16.0011 6.99455C16.2859 7.27996 16.4928 7.63383 16.6021 8.02231L16.8481 8.88498C16.8575 8.9181 16.8774 8.94725 16.9048 8.96801C16.9322 8.98877 16.9656 9 17 9C17.0344 9 17.0678 8.98877 17.0952 8.96801C17.1226 8.94725 17.1425 8.9181 17.1519 8.88498L17.3979 8.02231C17.5072 7.63383 17.7141 7.27996 17.9989 6.99455C18.2837 6.70915 18.6368 6.50176 19.0244 6.39224L19.8852 6.14572C19.9183 6.13632 19.9474 6.11637 19.9681 6.0889C19.9888 6.06143 20 6.02794 20 5.9935C20 5.95907 19.9888 5.92558 19.9681 5.89811C19.9474 5.87064 19.9183 5.85069 19.8852 5.84129Z\" fill=\"currentColor\"\/>\n<\/svg><br \/>\n<\/span><br \/>\n            <span>Summary<\/span><br \/>\n        <\/strong><br \/>\n            <span class=\"ai-article-summary__toggle-caret-up\" aria-label=\"Toggle Article Summary\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"icon-ui-caret-up\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\"><path d=\"M12.478 6.21a.637.637 0 00-.946 0L2.206 16.229c-.225.243-.28.633-.093.91.237.355.7.385.975.089l8.917-9.579 8.878 9.537c.225.243.589.301.847.101a.721.721 0 00.082-1.048L12.478 6.211z\"\/><\/svg><br \/>\n<\/span><br \/>\n            <span class=\"ai-article-summary__toggle-caret-down\" aria-label=\"Toggle Article Summary\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"icon-ui-caret-down\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\"><path d=\"M12.478 17.218a.637.637 0 01-.946 0L2.206 7.2c-.225-.242-.28-.632-.093-.91a.613.613 0 01.975-.088l8.917 9.579 8.878-9.538c.225-.242.589-.3.847-.1.33.255.357.752.082 1.048l-9.334 10.027z\"\/><\/svg><br \/>\n<\/span><br \/>\n    <\/button><\/p>\n<div class=\"ai-article-summary__collapsible\">\n<ul class=\"ai-article-summary__items\" data-editable=\"settings\">\n<li class=\"ai-article-summary__item\">New data from the James Webb Space Telescope suggests Neptune moon Nereid survived an ancient collision that destroyed the planet&#8217;s original moon system.<\/li>\n<li class=\"ai-article-summary__item\">Researchers found Nereid&#8217;s composition doesn&#8217;t match Kuiper Belt objects, challenging long-held assumptions about the moon&#8217;s origin.<\/li>\n<li class=\"ai-article-summary__item\">Computer simulations show that when Triton entered the Neptunian system over 4 billion years ago, Nereid likely escaped intact.<\/li>\n<\/ul>\n<p>\n            <span class=\"ai-article-summary__disclaimer-text\">AI-generated summary was reviewed by a CNN editor.<\/span><\/p>\n<\/p><\/div>\n<\/div>\n<\/div>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeau364004127p00d3sfm6n@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Nereid, Neptune\u2019s third-largest moon, could be the only intact survivor from an ancient set of moons destroyed early in the solar system\u2019s history, according to a new analysis based on data from the James Webb Space Telescope.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400013b66oxtrtsyn@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Neptune, the eighth and most distant planet from the sun, stands out among the outer planets in our solar system for its odd group of moons. The other outer giants \u2014 Uranus, Saturn and Jupiter \u2014 all have a broadly similar, orderly set of satellites, with several larger moons orbiting in the same direction as the host planet\u2019s rotation.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400023b66vy4jp953@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            But Neptune has a far smaller and more chaotic collection of moons: <a href=\"https:\/\/science.nasa.gov\/neptune\/moons\/triton\/\" target=\"_blank\">Triton<\/a>, Neptune\u2019s largest satellite, dwarfs all the others and orbits in the opposite direction of its host\u2019s rotation. It is the only large moon in the solar system to do so.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400033b66o17dwzw4@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Astronomers suspect the reason for Triton\u2019s odd behavior is that it didn\u2019t originate from the remnants of Neptune\u2019s formation, which would make it orbit in the same direction as that planet. They hypothesize instead that Triton might have originated from the <a href=\"https:\/\/science.nasa.gov\/solar-system\/kuiper-belt\/\" target=\"_blank\">Kuiper Belt<\/a>, a ring-shaped region of icy bodies at the edge of the solar system, and entered  the Neptunian environment over 4 billion years ago.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400043b66cu6teo6h@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            <a href=\"https:\/\/ui.adsabs.harvard.edu\/abs\/2017nova.pres.2899K\/abstract\" target=\"_blank\">Previous<\/a> <a href=\"https:\/\/arxiv.org\/abs\/1711.01581v1\" target=\"_blank\">studies<\/a> have suggested that Triton may have been captured by Neptune\u2019s gravity after a close pass and flung inward to smash into Neptune\u2019s primordial satellite system.\n    <\/p>\n<div data-uri=\"cms.cnn.com\/_components\/image\/instances\/cmpeaymru00133b660zyhf6si@published\" class=\"image_large-elevate vossi-image_large-elevate  image_large__hide-placeholder\" data-image-variation=\"image_large\" data-name=\"PIA00317~large.jpg\" data-component-name=\"image\" data-observe-resizes=\"\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\" data-original-ratio=\"0.7776041666666667\" data-original-height=\"1493\" data-original-width=\"1920\" data-url=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original\" data-editable=\"settings\" data-article-gutter=\"true\">\n<div class=\"image_large__container\" data-image-variation=\"image_large\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\">\n       <picture class=\"image_large__picture\"><source height=\"undefined\" width=\"679\" media=\"(max-width: 479px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original&amp;q=w_679,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"967\" media=\"(min-width: 480px) and (max-width: 767px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original&amp;q=w_967,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 768px) and (max-width: 1023px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1024px) and (max-width: 1279px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1280px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/pia00317-large.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><\/source><\/source><\/source><\/source><\/source><\/picture>\n    <\/div>\n<\/div>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400053b66oyqogmjs@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            If Neptune did have an original set of moons that more closely resembled those of its planetary neighbors, the arrival of Triton \u2014 which is just smaller than our own moon \u2014 would have wreaked havoc, crashing into the other satellites and annihilating some of them. The current features of Neptune\u2019s system support this scenario, and its seven inner moons appear to be <a href=\"https:\/\/ui.adsabs.harvard.edu\/abs\/2025epsc.conf..181D\/abstract\" target=\"_blank\">leftovers<\/a> of this ancient clash.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400063b668kxnoi6h@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            But now, new research using data from the James Webb Space Telescope suggests that one object might have been entirely spared from the chaos.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400073b66v92xtdoh@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cI think Nereid is the only intact survivor of this process,\u201d said Matthew Belyakov, a graduate student in planetary science at the California Institute of Technology and first author of a study on the subject <a href=\"http:\/\/www.science.org\/doi\/10.1126\/sciadv.aeb1429\" target=\"_blank\">published Wednesday<\/a> in the journal Science Advances.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99400083b66p7ejrvxq@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cThe other survivors are Neptune\u2019s innermost moons, but they are not intact because we have images of them from Voyager, and they look like disrupted rubble piles. So they are surviving material from the initial system, but not fully intact moons.\u201d\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav99500093b660lqixs8q@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            This hypothesis would upend previous assumptions that Nereid was, much like Triton and a few other Neptunian moons, a <a href=\"https:\/\/www.aanda.org\/articles\/aa\/full_html\/2020\/06\/aa36672-19\/aa36672-19.html\" target=\"_blank\">captured<\/a> Kuiper Belt object, as the new James Webb data revealed that Nereid\u2019s composition doesn\u2019t match what scientists know about Kuiper Belt objects.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000b3b669u84sznu@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Astronomers don\u2019t know a lot about Nereid, because it is faint and distant from Earth and the sun. The only image scientists have of it is a blurry photo taken in 1989 by NASA\u2019s Voyager 2 spacecraft during its brief fly-by of Neptune. Nereid is the outermost of Neptune\u2019s known moons, and it has one of the most eccentric (meaning noncircular) orbits in the solar system. It takes <a href=\"https:\/\/science.nasa.gov\/neptune\/moons\/nereid\/\" target=\"_blank\">360 Earth days<\/a> for the moon to complete one lap around Neptune.\n    <\/p>\n<div data-uri=\"cms.cnn.com\/_components\/image\/instances\/cmpeaz47b00153b669cwh0rkn@published\" class=\"image_large-elevate vossi-image_large-elevate  image_large__hide-placeholder\" data-image-variation=\"image_large\" data-name=\"Nereid-browse-732X520.jpg\" data-component-name=\"image\" data-observe-resizes=\"\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\" data-original-ratio=\"0.7103825136612022\" data-original-height=\"520\" data-original-width=\"732\" data-url=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original\" data-editable=\"settings\" data-article-gutter=\"true\">\n<div class=\"image_large__container\" data-image-variation=\"image_large\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\">\n       <picture class=\"image_large__picture\"><source height=\"undefined\" width=\"679\" media=\"(max-width: 479px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_679,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"967\" media=\"(min-width: 480px) and (max-width: 767px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_967,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 768px) and (max-width: 1023px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1024px) and (max-width: 1279px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1280px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><img decoding=\"async\" src=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/nereid-browse-732x520.jpg?c=original&amp;q=w_860,c_fill\" alt=\"Voyager 2's photo of Nereid, taken in 1989 during the space probe's flyby of Neptune.\" class=\"image_large__dam-img image_large__dam-img--loading\" onload=\"this.classList.remove('image_large__dam-img--loading')\" onerror=\"imageLoadError(this)\" height=\"520\" width=\"732\" loading=\"lazy\"\/><\/source><\/source><\/source><\/source><\/source><\/picture>\n    <\/div>\n<\/div>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000c3b6611pg7mpf@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Named after the sea nymphs of Greek mythology, Nereid is believed to be around <a href=\"https:\/\/www.britannica.com\/topic\/Nereid-astronomy\" target=\"_blank\">210 miles<\/a> (338 kilometers) in diameter. Even if it\u2019s part of an original set of moons that Neptune had shortly after its formation, about 4.5 billion years ago, it\u2019s difficult to speculate what that system might have looked like, according to Belyakov. \u201cIt\u2019s kind of anyone\u2019s guess what was there before Triton,\u201d he said.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000d3b667bsxywqo@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Just like Triton, Nereid is an irregular satellite, a class of objects whose orbits are inclined, backward or distant from their host, suggesting they were captured by their host and previously orbited the sun independently.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000e3b66juvzjpmu@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            But even among irregular satellites, Nereid is an outlier, Belyakov said. \u201cIt\u2019s twice as big in diameter as the next largest one, which is Phoebe around Saturn, and it\u2019s not all that distant from its host planet compared to a lot of the other irregular satellites.\u201d Some of Nereid\u2019s features, he added, have long made some astronomers doubt the moon\u2019s Kuiper Belt origin.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000f3b66gh6lxt98@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            A 10-minute and 40-second observation commissioned for the study and made using James Webb\u2019s infrared capabilities, which can reveal the composition of a distant object, gives credence to those doubts.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000g3b66bave9mja@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cWhat we found was an object that was highly water-rich on the surface, brighter than a lot of Kuiper Belt objects, and with some presence of CO2,\u201d Belyakov said. \u201cThe overall signature was more similar to that of regular satellites around Uranus rather than Kuiper Belt objects.\u201d  The results were compared with data from 54 Kuiper Belt bodies, also from <a href=\"https:\/\/www.stsci.edu\/jwst-program-info\/program\/?program=2418\" target=\"_blank\">James Webb observations<\/a>.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000h3b661l34x41w@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Belyakov and his colleagues then performed computer simulations to test whether the hypothesis of Nereid as part of an original moon system would stand true. \u201cWhat we found in our simulations is that in the cases where Triton survives, rather than get destroyed or kicked into Neptune,\u201d Belyakov said, \u201caround 25% of the time one or more moons can survive the Triton encounter on distant orbits.\u201d That number compares favorably  to the chances of Nereid being a captured object instead, he added.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000i3b664124sey9@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            In this scenario, in the first 100 million or 200 million years of solar system history, Triton would have slammed into the Neptunian system, colliding with a number of the original moons. But Nereid would have been spared and sent on an eccentric orbit instead. The event would have also slowed down Triton\u2019s own eccentric orbit and put it in its current path, closer to Neptune.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000j3b66b0mbq9by@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cI think people have already wanted this to be true,\u201d Belyakov said about Nereid\u2019s possible new origin story. \u201cNow we can start the actual science feedback loop. There is more data to be gathered for Nereid compositionally that can help us really talk through the formation of the Neptunian system, and if we treat Nereid as a regular satellite, maybe that can tell us a lot about how satellites form around ice giants.\u201d\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000k3b66m95gelmb@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            Further James Webb observations can help, but the final word on what Nereid really looks like would require a mission to Neptune. At the moment, none is planned, and <a href=\"https:\/\/science.nasa.gov\/neptune\/exploration\/\" target=\"_blank\">Voyager 2<\/a>, launched in 1977, is the only spacecraft to have studied the system.\n    <\/p>\n<div data-uri=\"cms.cnn.com\/_components\/image\/instances\/cmpeazmde00173b66jjy9w5ux@published\" class=\"image_large-elevate vossi-image_large-elevate  image_large__hide-placeholder\" data-image-variation=\"image_large\" data-name=\"voyager.jpg\" data-component-name=\"image\" data-observe-resizes=\"\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\" data-original-ratio=\"0.5625\" data-original-height=\"900\" data-original-width=\"1600\" data-url=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original\" data-editable=\"settings\" data-article-gutter=\"true\">\n<div class=\"image_large__container\" data-image-variation=\"image_large\" data-breakpoints=\"{\" image_large--eq-extra-small=\"\">\n       <picture class=\"image_large__picture\"><source height=\"undefined\" width=\"679\" media=\"(max-width: 479px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_679,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"967\" media=\"(min-width: 480px) and (max-width: 767px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_967,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 768px) and (max-width: 1023px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1024px) and (max-width: 1279px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><source height=\"undefined\" width=\"860\" media=\"(min-width: 1280px)\" srcset=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_860,c_fill\/f_webp\" type=\"image\/webp\"><img decoding=\"async\" src=\"https:\/\/media.cnn.com\/api\/v1\/images\/stellar\/prod\/voyager-20260520142721511.jpg?c=original&amp;q=w_860,c_fill\" alt=\"Voyager 2 is the only spacecraft to have visited Uranus and Neptune.\" class=\"image_large__dam-img image_large__dam-img--loading\" onload=\"this.classList.remove('image_large__dam-img--loading')\" onerror=\"imageLoadError(this)\" height=\"900\" width=\"1600\" loading=\"lazy\"\/><\/source><\/source><\/source><\/source><\/source><\/picture>\n    <\/div>\n<\/div>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000m3b66c38rv823@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            The new study is a lovely and simple examination of how the Neptunian moon system became the way it looks today, according to Carolyn Porco, an American planetary scientist who worked on NASA\u2019s Voyager and Cassini missions and was not involved with the new study.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000n3b66di2rlx1k@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cIt is Triton that was the captured body and it subsequently caused havoc, gravitationally scattering Neptune\u2019s original moons hither and thither but mostly out of Neptune orbit,\u201d Porco wrote in an email. \u201cThe authors show it is plausible that Nereid lucked out by remaining in orbit around Neptune but at a much larger distance than Triton. This would explain why its composition observed by James Webb does not match that of the bodies in the Kuiper Belt.\u201d\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000o3b66lyuvi5u2@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            James Webb is once again showing its tremendous power as a solar system explorer, said Leigh Fletcher, a professor at the School of Physics and Astronomy of the University of Leicester in England who also did not participate in the work.\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000p3b66cngrlcj5@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            \u201cWe\u2019ve long known there\u2019s something special about Neptune\u2019s collection of moons, having been severely disrupted by the arrival of Triton and other satellites captured by Neptune\u2019s gravity over the years,\u201d Fletcher  wrote in an email. \u201cGiven those destructive processes, I don\u2019t think we expected to see anything left of Neptune\u2019s original satellite system, other than rubble and debris.\u201d\n    <\/p>\n<p class=\"paragraph-elevate inline-placeholder vossi-paragraph_elevate\" data-uri=\"cms.cnn.com\/_components\/paragraph\/instances\/cmpeav995000q3b66s7j5k8tf@published\" data-editable=\"text\" data-component-name=\"paragraph\" data-article-gutter=\"true\">\n            But James Webb data shows otherwise, and more work with the telescope could reveal finer scale features and maybe strengthen the case for Nereid as an original satellite, he added. \u201cIt\u2019s a compelling idea, and something that can certainly be tested with future JWST observations, and hopefully with an ambitious future mission to the Neptune system.\u201d\n    <\/p>\n<p data-uri=\"cms.cnn.com\/_components\/editor-note\/instances\/cmpeb7aqd00003b6rleig3fia@published\" data-editable=\"text\" data-component-name=\"editor-note\" class=\"editor-note-elevate vossi-editor-note_elevate inline-placeholder\" data-article-gutter=\"true\">\n    Sign up for <a href=\"https:\/\/www.cnn.com\/newsletters\/wonder-theory?source=nl-acq_article\">CNN\u2019s Wonder Theory science newsletter<\/a>. Explore the universe with news on fascinating discoveries, scientific advancements and more.\n<\/p>\n<\/p><\/div>\n<p><a href=\"https:\/\/www.cnn.com\/2026\/05\/20\/science\/neptune-moon-nereid-survivor\">Source link <\/a><br \/>\nMore: https:\/\/theglobaltrack.com\/<br \/>\nhttps:\/\/corinthiames.com.br\/<\/p>","protected":false},"excerpt":{"rendered":"<p>Summary New data from the James Webb Space Telescope suggests Neptune moon Nereid survived an ancient collision that destroyed the planet&#8217;s original moon system. Researchers found Nereid&#8217;s composition doesn&#8217;t match Kuiper Belt objects, challenging long-held assumptions about the moon&#8217;s origin. Computer simulations show that when Triton entered the Neptunian system over 4 billion years ago, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":135401,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAow2JLhCw:productID":"","maa_idioma":"","maa_pais":"","footnotes":""},"categories":[1],"tags":[20835,20698,5642,3817,37267,8127],"class_list":["post-135400","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ubirata","tag-ancient","tag-collision","tag-intact","tag-moon","tag-neptune","tag-survivor"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Neptune moon could be only intact survivor from ancient collision - Ubirat\u00e3 Online Not\u00edcias - A realidade ao seu alcance!<\/title>\n<meta name=\"description\" content=\"Summary New data from the James Webb Space Telescope suggests Neptune moon Nereid survived an ancient collision that destroyed the planet&#039;s original moon\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ubirataonline.com.br\/en\/neptune-moon-could-be-only-intact-survivor-from-ancient-collision\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Neptune moon could be only intact survivor from ancient collision\" \/>\n<meta property=\"og:description\" content=\"Summary New data from the James Webb Space Telescope suggests Neptune moon Nereid survived an ancient collision that destroyed the planet&#039;s original moon\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ubirataonline.com.br\/en\/neptune-moon-could-be-only-intact-survivor-from-ancient-collision\/\" \/>\n<meta property=\"og:site_name\" content=\"Ubirat\u00e3 Online Not\u00edcias - 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