{"id":11812,"date":"2025-06-03T12:23:31","date_gmt":"2025-06-03T10:23:31","guid":{"rendered":"https:\/\/starbottle.space\/?p=11812"},"modified":"2025-06-03T12:23:33","modified_gmt":"2025-06-03T10:23:33","slug":"ghiaccio-dacqua-attorno-a-una-giovane-stella-simile-al-sole","status":"publish","type":"post","link":"https:\/\/starbottle.space\/en\/water-ice-around-a-young-sun-like-star\/","title":{"rendered":"Water ice around a young Sun-like star"},"content":{"rendered":"<p>A revolutionary discovery comes from deep space: for the first time, it has been detected <strong>crystal-clear water ice<\/strong> in the disc of debris orbiting the <strong>HD 181327<\/strong>, a young star similar to our Sun, located about 155 light years from Earth. Confirming the hypothesis, long discussed by astronomers, are data collected by the powerful <strong>NirSpec spectrograph of the James Webb Space Telescope<\/strong>.<\/p>\n\n\n\n<p>Published in the magazine <em>Nature<\/em>, discovery opens a new window on the <strong>formation of planets<\/strong> and on the evolution of <strong>planetary systems<\/strong>.<\/p>\n\n\n\n<p><strong>Water ice in space: an essential ingredient for life<\/strong><\/p>\n\n\n\n<p>\u201cIt is not just about water ice, but about <strong>crystalline ice<\/strong> - similar to that found in Saturn's rings or in the icy bodies of the <strong>Kuiper belt<\/strong> in our Solar System,\u201d explains <strong>Chen Xie<\/strong>, an astronomer at Johns Hopkins University. The ice detected is mixed with dust in the form of tiny \u201cdirty snowballs\u201d, and may play a crucial role in the formation of the <strong>giant planets<\/strong>.<\/p>\n\n\n\n<p>Furthermore, these icy fragments could be transported by comets and asteroids towards <strong>rocky planets<\/strong>, potentially contributing to the water supply - and thus to the possibility of life.<\/p>\n\n\n\n<p><strong>A young and dynamic system under the eye of James Webb<\/strong><\/p>\n\n\n\n<p>HD 181327 is a young star, with an estimated age of <strong>23 million years<\/strong>, much younger than our Sun (4.6 billion years old). It is also more massive and slightly hotter. Webb's observations revealed that the <strong>water ice is not evenly distributed<\/strong> in the disc, but is concentrated in the cooler regions far from the star.<\/p>\n\n\n\n<p>Another fascinating discovery concerns the structure of the system: between the star and the disc there is an empty, dust-free area, while the disc itself closely resembles the <strong>Kuiper belt<\/strong>, populated by icy bodies and dwarf planets.<\/p>\n\n\n\n<p>\u201c<strong>HD 181327 is an extremely active system<\/strong>\u201d, Chen Xie further emphasises. \u201cCollisions between icy bodies are frequent and release very fine ice particles, which are perfectly visible thanks to the sensitivity of the Webb telescope.\u201d<\/p>","protected":false},"excerpt":{"rendered":"<p>Una scoperta rivoluzionaria arriva dallo spazio profondo: per la prima volta, \u00e8 stato rilevato ghiaccio d\u2019acqua cristallino nel disco di detriti che orbita attorno a HD 181327, una giovane stella simile al nostro Sole, situata a circa 155 anni luce dalla Terra. A confermare l\u2019ipotesi, a lungo discussa dagli astronomi, sono i dati raccolti dal [&hellip;]<\/p>\n","protected":false},"author":55,"featured_media":11813,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wds_primary_category":44,"footnotes":""},"categories":[44],"tags":[],"class_list":["post-11812","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vita-nello-spazio"],"acf":[],"_links":{"self":[{"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/posts\/11812","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/comments?post=11812"}],"version-history":[{"count":1,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/posts\/11812\/revisions"}],"predecessor-version":[{"id":11814,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/posts\/11812\/revisions\/11814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/media\/11813"}],"wp:attachment":[{"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/media?parent=11812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/categories?post=11812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starbottle.space\/en\/wp-json\/wp\/v2\/tags?post=11812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}