{"id":566080,"date":"2026-05-04T18:11:09","date_gmt":"2026-05-04T18:11:09","guid":{"rendered":"https:\/\/www.newsbeep.com\/uk\/566080\/"},"modified":"2026-05-04T18:11:09","modified_gmt":"2026-05-04T18:11:09","slug":"astronomers-believe-theyve-detected-an-atmosphere-around-a-tiny-icy-world-beyond-pluto","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/uk\/566080\/","title":{"rendered":"Astronomers believe they&#8217;ve detected an atmosphere around a tiny, icy world beyond Pluto"},"content":{"rendered":"<p>Your support helps us to tell the story<\/p>\n<p class=\"sc-1uza6dc-0 iOIawn\">From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it&#8217;s investigating the financials of Elon Musk&#8217;s pro-Trump PAC or producing our latest documentary, &#8216;The A Word&#8217;, which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.<\/p>\n<p class=\"sc-1uza6dc-0 iOIawn\">At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.<\/p>\n<p class=\"sc-1uza6dc-0 iOIawn\">The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.<\/p>\n<p>Your support makes all the difference.Read more<\/p>\n<p> A new study suggests that a tiny, icy world beyond <a href=\"https:\/\/www.independent.co.uk\/topic\/pluto\" rel=\"nofollow noopener\" target=\"_blank\">Pluto<\/a> harbors a thin, delicate atmosphere that may have been created by volcanic eruptions or a comet strike.<\/p>\n<p>Just 300 miles (500 kilometers) or so across, this mini Pluto is thought to be the solar system&#8217;s smallest object yet with a clearly detected global atmosphere bound by gravity, said lead researcher Ko Arimatsu of the National Astronomical Observatory of <a href=\"https:\/\/www.independent.co.uk\/topic\/japan\" rel=\"nofollow noopener\" target=\"_blank\">Japan<\/a>.<\/p>\n<p>\u201cThis is an amazing development, but it sorely needs independent verification. The implications are profound if verified,\u201d said Southwest Research Institute&#8217;s Alan Stern, the lead scientist behind NASA&#8217;s <a href=\"https:\/\/www.independent.co.uk\/topic\/new-horizons\" rel=\"nofollow noopener\" target=\"_blank\">New Horizons<\/a> mission to Pluto and beyond. He was not involved in the study.<\/p>\n<p>The finding offers fresh insight into our solar system\u2019s farthest, coldest objects in a region known as the Kuiper Belt. Researchers used three telescopes in Japan to observe the object in 2024 as it passed in front of a background star, briefly dimming the starlight.<\/p>\n<p>\u201cIt changes our view of small worlds in the solar system, not only beyond <a href=\"https:\/\/www.independent.co.uk\/topic\/neptune\" rel=\"nofollow noopener\" target=\"_blank\">Neptune<\/a>,\u201d Arimatsu said in an email. Finding an atmosphere around such a small object was \u201cgenuinely surprising,&#8221; he added, and challenges \u201cthe conventional view that atmospheres are limited to large planets, dwarf planets and some large moons.\u201d <\/p>\n<p>This so-called minor planet \u2014 formally known as (612533) 2002 XV93 \u2014 is considered a plutino, circling the sun twice in the time it takes Neptune to complete three solar orbits. At the time of the study, it was more than 3.4 billion miles (5.5 billion kilometers) away, farther than even Pluto, the only other object in the Kuiper Belt with an observed atmosphere.<\/p>\n<p>This cosmic iceball\u2019s atmosphere is believed to be 5 million to 10 million times thinner than Earth\u2019s protective atmosphere, according to the the study appearing Monday in the journal Nature Astronomy.<\/p>\n<p>It\u2019s 50 to 100 times thinner than even Pluto\u2019s tenuous atmosphere. The likeliest atmospheric chemicals are methane, nitrogen or carbon monoxide, any of which could reproduce the observed dimming as the object passed before the star, according to Arimatsu.<\/p>\n<p>Further observations, especially by NASA\u2019s Webb Space Telescope, could verify the makeup of the atmosphere, according to Arimatsu.<\/p>\n<p>\u201cThat is why future monitoring is so important,&#8221; he said. &#8220;If the atmosphere fades over the next several years, that would support an impact origin. If it persists, or varies seasonally, that would point more toward ongoing internal gas supply\u201d from ice volcanoes.<\/p>\n<p>___<\/p>\n<p>The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute\u2019s Department of Science Education and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.<\/p>\n","protected":false},"excerpt":{"rendered":"Your support helps us to tell the story From reproductive rights to climate change to Big Tech, The&hellip;\n","protected":false},"author":2,"featured_media":566081,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[90,416,56,54,55],"class_list":["post-566080","post","type-post","status-publish","format-standard","has-post-thumbnail","category-space","tag-science","tag-space","tag-uk","tag-united-kingdom","tag-unitedkingdom"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/566080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=566080"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/566080\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/566081"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=566080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=566080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=566080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}