{"id":21030577,"date":"2016-07-16T22:42:41","date_gmt":"2016-07-16T20:42:41","guid":{"rendered":"http:\/\/znanost.geek.hr\/?p=21030577"},"modified":"2016-07-16T22:44:29","modified_gmt":"2016-07-16T20:44:29","slug":"otkriven-novi-patuljasti-planet-rubovima-naseg-sustava","status":"publish","type":"post","link":"https:\/\/geek.hr\/znanost\/clanak\/otkriven-novi-patuljasti-planet-rubovima-naseg-sustava\/","title":{"rendered":"Otkriven novi patuljasti planet na rubovima na\u0161eg sustava"},"content":{"rendered":"<div id=\"attachment_21030578\" style=\"width: 1010px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-21030578\" class=\"wp-image-21030578 size-full\" src=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/google-plus.jpg\" alt=\"google-plus\" width=\"1000\" height=\"750\" srcset=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/google-plus.jpg 1000w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/google-plus-300x225.jpg 300w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/google-plus-768x576.jpg 768w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/google-plus-720x540.jpg 720w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><p id=\"caption-attachment-21030578\" class=\"wp-caption-text\">Credit: Google Plus<\/p><\/div>\n<p>Do prije samo nekoliko desetlje\u0107a, <strong>Pluton<\/strong> je smatran posljednjim \u010dlanom Sun\u010deva sustava, iza \u010dije orbite se krilo tamno, pusto prostranstvo. Astronomi su jo\u0161 od njegova otkri\u0107a davne 1930. godine naga\u0111ali kako se ondje jo\u0161 ne\u0161to mo\u017eda krije, predaleko i pretamno da bi se tada\u0161njom opremom otkrilo.<\/p>\n<p>Sredinom 1992. godine otkriven je <strong>1992 QB1<\/strong>, nebesko tijelo \u010dija orbita le\u017ei iza Plutonove. Uskoro je uslijedio pronalazak jo\u0161 nekoliko sli\u010dnih objekata, a danas se taj broj popeo na preko tisu\u0107u poznatih nebeskih tijela.<\/p>\n<p>Kuiperov pojas, kako se to podru\u010dje slu\u017ebeno zove, dom je za nekoliko tijela koji su masom i promjerom sli\u010dni Plutonu; <strong>Eris<\/strong> je, primjerice, ne\u0161to manjeg promjera, no ve\u0107e mase.<\/p>\n<p>Budu\u0107i da je rije\u010d o vrlo zanimljivom podru\u010dju, astronomi ga budno motre. Upravo je objavljeno kako su otkrili novi svijet, daleko dalji no \u0161to je to (ionako vrlo daleki) Pluton; <strong>2015 RR245<\/strong> &#8211; kako se slu\u017ebeno zove &#8211; udaljen je od nas devet milijardi kilometara i jednu revoluciju oko Sunca na\u010dini za svakih 700 godina. Usporedbe radi, spomenuti Pluton to u\u010dini za &#8220;samo&#8221; 248 godina. Promjera je oko 700 kilometara, dok se njegov sastav mo\u017ee tek naga\u0111ati.<\/p>\n<div id=\"attachment_21030579\" style=\"width: 1930px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-21030579\" class=\"wp-image-21030579 size-full\" src=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian.jpg\" alt=\"2015-RR245-theguardian\" width=\"1920\" height=\"1152\" srcset=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian.jpg 1800w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian-300x180.jpg 300w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian-768x461.jpg 768w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian-720x432.jpg 720w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian-1000x600.jpg 1000w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2016\/07\/2015-RR245-theguardian-450x270.jpg 450w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><p id=\"caption-attachment-21030579\" class=\"wp-caption-text\">Orbita patuljastog planeta 2015 RR245 izrazito je elipti\u010dna: u perihelu dolazi na prag Neptunove orbite, dok u afelu gotovo 40 puta dalje (Credit: The Guardian)<\/p><\/div>\n<p>Orbita mu je izrazito elipti\u010dna: u najdaljoj to\u010dki udaljen je \u010dak 120 astronomskih jedinica (ili 12 milijardi kilometara) od Sunca, dok \u0107e u najbli\u017eoj to\u010dki &#8211; \u0161to \u0107e se dogoditi 2096. godine &#8211; pri\u0107i na 34 astronomske jedinice udaljenosti, odnosno na &#8220;samo&#8221; pet milijardi kilometara. Primjera radi, <strong>Neptun<\/strong>, posljednji planet na\u0161eg sustava, od Sunca je udaljen 30 astronomskih jedinica.<\/p>\n<p>Iako svojom veli\u010dinom i orbitalnim parametrima pripada skupini patuljastih planeta, tu mu titulu mora administrativno dodijeliti Me\u0111unarodna astronomska unija. 2015 RR245 nije jedini koji \u010deka slu\u017ebeno odobrenje: s njim u redu jo\u0161 stoje <strong>Sedna<\/strong>, <strong>Quaoar<\/strong> i <strong>2007 OR10<\/strong>. Do tada, slu\u017ebeno priznati patuljasti planeti ostaju <strong>Ceres<\/strong>, Pluton, Eris, <strong>Haumea<\/strong> i <strong>Makemake<\/strong>.<\/p>\n<p><iframe loading=\"lazy\" title=\"A New Dwarf Planet - 2015 RR245 - Discovered in July 2016 - Space Engine\" width=\"880\" height=\"495\" src=\"https:\/\/www.youtube.com\/embed\/JdOLpo49APw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Do prije samo nekoliko desetlje\u0107a, Pluton je smatran posljednjim \u010dlanom Sun\u010deva sustava, iza \u010dije orbite se krilo tamno, pusto prostranstvo. Astronomi su jo\u0161 od njegova otkri\u0107a davne 1930. godine naga\u0111ali kako se ondje jo\u0161 ne\u0161to mo\u017eda krije, predaleko i pretamno da bi se tada\u0161njom opremom otkrilo. Sredinom 1992. godine otkriven je 1992 QB1, nebesko tijelo [&hellip;]<\/p>\n","protected":false},"author":10022,"featured_media":21030578,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[16359],"tags":[18971,18448,16564,18447,16689],"class_list":["post-21030577","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-planete-i-mjeseci","tag-2015-rr245","tag-eris","tag-kuiperov-pojas","tag-patuljasti-planeti","tag-pluton"],"modified_by":null,"_links":{"self":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21030577","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/users\/10022"}],"replies":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/comments?post=21030577"}],"version-history":[{"count":0,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21030577\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media\/21030578"}],"wp:attachment":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media?parent=21030577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/categories?post=21030577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/tags?post=21030577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}