{"id":1101,"date":"2005-12-09T13:07:00","date_gmt":"2005-12-09T12:07:00","guid":{"rendered":"https:\/\/kids.esa.int\/moons_and_rings\/"},"modified":"2026-10-08T00:36:01","modified_gmt":"2026-10-07T22:36:01","slug":"moons_and_rings","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/hu\/moons_and_rings\/","title":{"rendered":"Holdak \u00e9s gy\u0171r\u0171k"},"content":{"rendered":"<div class=\"lede\">\n<p>Minden bolyg\u00f3 a Nap k\u00f6r\u00fcl az \u00f3ramutat\u00f3 j\u00e1r\u00e1s\u00e1val ellent\u00e9tes ir\u00e1nyban kering \u2013 a F\u00f6ld \u00e9szaki sark\u00e1r\u00f3l n\u00e9zve. Az \u00e9v\u00fck \u2013 azaz az az id\u0151, am\u00edg egy teljes k\u00f6rt megtesznek \u2013 a Napt\u00f3l val\u00f3 t\u00e1vols\u00e1guk f\u00fcggv\u00e9ny\u00e9ben v\u00e1ltozik. A Merk\u00faron egy \u00e9v mind\u00f6ssze 88 f\u00f6ldi napig tart, \u00edgy egy ott sz\u00fcletett embernek n\u00e9gyszer annyi sz\u00fclet\u00e9snapja lenne, mint nek\u00fcnk a F\u00f6ld\u00f6n. Ezzel szemben a Pl\u00fat\u00f3n egy \u00e9v 248 f\u00f6ldi \u00e9vnek felel meg. Egy Pl\u00fat\u00f3n sz\u00fcletett ember soha nem \u00fcnnepelne sz\u00fclet\u00e9snapot!<\/p>\n<\/div>\n<p>A V\u00e9nusznak \u00e9s a Merk\u00farnak nincsenek term\u00e9szetes holdjai, de a t\u00f6bbi h\u00e9t bolyg\u00f3t mindegyik\u00e9t holdak keringik. Az eddig nyilv\u00e1ntart\u00e1sba vett holdak sz\u00e1ma \u00f6sszesen 138. A holdak t\u00f6bbs\u00e9ge nagyon kicsi, \u00e9s m\u00e9g nagy t\u00e1vcs\u00f6vekkel is nehezen l\u00e1that\u00f3. Jelenleg a rekordot a Jupiter tartja, 63 ismert holdj\u00e1val. Ezek k\u00f6z\u00f6tt n\u00e9gy bolyg\u00f3 m\u00e9ret\u0171 hold is tal\u00e1lhat\u00f3: a Ganymedes (a Naprendszer legnagyobb holdja), a Callisto, az Europa \u00e9s az Io.<\/p>\n<p>A t\u00f6bbi g\u00e1z\u00f3ri\u00e1s er\u0151s gravit\u00e1ci\u00f3ja szint\u00e9n nagy sz\u00e1m\u00fa holdat vonzott mag\u00e1hoz: a Szaturnusz k\u00f6r\u00fcl 31, az Ur\u00e1nusz k\u00f6r\u00fcl 27, a Neptunusz k\u00f6r\u00fcl pedig 13 hold kering. Mind a F\u00f6ld, mind a Pl\u00fat\u00f3 k\u00f6r\u00fcl egy-egy nagy hold kering.<\/p>\n<p>A n\u00e9gy legnagyobb bolyg\u00f3 \u2013 a Jupiter, a Szaturnusz, az Ur\u00e1nusz \u00e9s a Neptunusz \u2013 szint\u00e9n gy\u0171r\u0171kkel rendelkezik. Ezek j\u00e9g- \u00e9s k\u0151darabokb\u00f3l \u00e1llnak, amelyek m\u00e9rete a hegyekt\u0151l a cigarettaf\u00fcstig terjed. A gy\u0171r\u0171k lehetnek egy sz\u00e9tesett hold maradv\u00e1nyai, vagy a k\u00f6zeli holdakr\u00f3l let\u00f6rt darabok.<\/p>","protected":false},"excerpt":{"rendered":"<p>All of the planets travel around the Sun in a counter-clockwise direction \u2013 as seen from above Earth\u2019s north pole. Their year &#8211; the time they take to complete one [&hellip;]<\/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\/2005\/04\/jupiter_s_moon_europa2\/17905460-2-eng-GB\/Jupiter_s_moon_Europa.jpg","esa_banner_description":"Jupiter's moon, Europa","esa_banner_credit":"NASA\/DLR","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/04\/Jupiter_s_moon_Europa2","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":[10,11,12],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1101","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1101","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=1101"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1101\/revisions"}],"predecessor-version":[{"id":2244,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1101\/revisions\/2244"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=1101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=1101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=1101"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=1101"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=1101"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=1101"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=1101"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=1101"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=1101"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=1101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}