{"id":193,"date":"2021-12-02T12:45:12","date_gmt":"2021-12-02T11:45:12","guid":{"rendered":"https:\/\/kids.esa.int\/comets\/"},"modified":"2026-10-08T00:25:20","modified_gmt":"2026-10-07T22:25:20","slug":"comets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/hu\/comets\/","title":{"rendered":"\u00dcst\u00f6k\u00f6s\u00f6k"},"content":{"rendered":"
\n

Az \u00f3kori emberek f\u00e9ltek a \u00fcst\u00f6k\u00f6s\u00f6kt\u0151l \u2013 azt hitt\u00e9k, hogy balszerencs\u00e9t hoznak, vagy katasztr\u00f3f\u00e1t jeleznek el\u0151re. Ma m\u00e1r tudjuk, hogy az \u00fcst\u00f6k\u00f6s\u00f6k a bolyg\u00f3k kialakul\u00e1s\u00e1b\u00f3l megmaradt kis j\u00e9gbolyg\u00f3k. \u00dagy gondolj\u00e1k, hogy a Naprendszer sz\u00e9l\u00e9n, a Pl\u00fat\u00f3 p\u00e1ly\u00e1ja t\u00fals\u00f3 oldal\u00e1n t\u00f6bb milli\u00e1rd \u00fcst\u00f6k\u00f6s l\u00e9tezik.<\/p>\n<\/div>\n

A legt\u00f6bb \u00fcst\u00f6k\u00f6s olyan kicsi \u00e9s olyan messze van, hogy m\u00e9g a legnagyobb t\u00e1vcs\u00f6vekkel sem l\u00e1thatjuk \u0151ket. De akkor l\u00e1thatjuk \u0151ket, amikor a Nap fel\u00e9 k\u00f6zelednek, \u00e9s g\u00e1zb\u00f3l \u00e9s porb\u00f3l \u00e1ll\u00f3 cs\u00f3v\u00e1k alakulnak ki m\u00f6g\u00f6tt\u00fck. (Az \u2018\u00fcst\u00f6k\u00f6s\u2019 sz\u00f3 jelent\u00e9se: \u201esz\u0151r\u00f6s csillag\u201d.)<\/p>\n

A Nap h\u0151je miatt a j\u00e9g g\u00e1zz\u00e1 alakul, amely t\u00f6bb milli\u00f3 kilom\u00e9teren \u00e1t \u00e1ramlik az \u0171rbe. Hosszuk ellen\u00e9re a benn\u00fck tal\u00e1lhat\u00f3 porr\u00e9szecsk\u00e9k nem nagyobbak, mint a homokszemek.<\/p>\n

\"Rosetta
Rosetta \u2013 a \u00fcst\u00f6k\u00f6svad\u00e1sz<\/figcaption><\/figure>\n

Egyes \u00fcst\u00f6k\u00f6s\u00f6knek csup\u00e1n n\u00e9h\u00e1ny \u00e9vbe telik, hogy megker\u00fclj\u00e9k a Napot. M\u00e1soknak \u2013 mint p\u00e9ld\u00e1ul a Halley-\u00fcst\u00f6k\u00f6snek \u2013 sokkal t\u00f6bb id\u0151be telik. Megint m\u00e1sok csak egyszer jelennek meg, \u00e9s soha t\u00f6bb\u00e9 nem l\u00e1tj\u00e1k \u0151ket. Az ESA SOHO \u0171rszond\u00e1j\u00e1nak seg\u00edts\u00e9g\u00e9vel t\u00f6bb ezer olyan kis \u00fcst\u00f6k\u00f6st fedeztek fel, amelyek nagyon k\u00f6zel rep\u00fclnek a Naphoz. Sokuk a Napba csap\u00f3dik, vagy a Nap er\u0151s gravit\u00e1ci\u00f3ja sz\u00e9tszak\u00edtja \u0151ket.<\/p>\n

2014-ben az eur\u00f3pai Rosetta \u0171rszonda t\u00f6rt\u00e9nelmet \u00edr azzal, hogy egy \u00fcst\u00f6k\u00f6s k\u00f6r\u00fcli p\u00e1ly\u00e1ra \u00e1ll, \u00e9s lesz\u00e1ll\u00edt egy lesz\u00e1ll\u00f3egys\u00e9get annak felsz\u00edn\u00e9re.<\/p>","protected":false},"excerpt":{"rendered":"

Ancient people were afraid of comets \u2013 they were said to bring bad luck or foretell disaster. We now know that comets are small ice worlds that have been left […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2003\/04\/giotto_s_art_shows_a_comet_in_the_background2\/17913109-2-eng-GB\/Giotto_s_art_shows_a_comet_in_the_background.jpg","esa_banner_description":"Giotto's art shows a comet in the background","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Giotto_s_art_shows_a_comet_in_the_background2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[46,10,11],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-193","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/comments?post=193"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/193\/revisions"}],"predecessor-version":[{"id":4350,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/193\/revisions\/4350"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=193"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=193"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=193"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=193"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=193"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=193"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=193"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}