{"id":783,"date":"2011-01-25T15:27:00","date_gmt":"2011-01-25T14:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/moons\/"},"modified":"2026-10-08T00:32:12","modified_gmt":"2026-10-07T22:32:12","slug":"moons","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/hu\/moons\/","title":{"rendered":"Holdak"},"content":{"rendered":"
\n

A holdak olyan term\u00e9szetes \u00e9gitestek, amelyek bolyg\u00f3k k\u00f6r\u00fcl keringenek. A tud\u00f3sok \u00e1ltal\u00e1ban bolyg\u00f3holdaknak nevezik \u0151ket (az ember \u00e1ltal k\u00e9sz\u00edtett m\u0171holdakat n\u00e9ha mesters\u00e9ges holdaknak is nevezik). Naprendszer\u00fcnkben k\u00f6r\u00fclbel\u00fcl 170 hold tal\u00e1lhat\u00f3. Legt\u00f6bbj\u00fck a g\u00e1z\u00f3ri\u00e1sok, a Jupiter \u00e9s a Szaturnusz k\u00f6r\u00fcl kering. A kis bolyg\u00f3knak \u00e1ltal\u00e1ban kev\u00e9s holdjuk van: a Marsnak kett\u0151, a F\u00f6ldnek egy, m\u00edg a V\u00e9nusznak \u00e9s a Merk\u00farnak egy sincs.<\/p>\n<\/div>\n

A F\u00f6ld Holdja a bolyg\u00f3hoz k\u00e9pest szokatlanul nagy. A legt\u00f6bb hold a k\u00f6zel\u00e9ben kering\u0151 bolyg\u00f3 mellett elt\u00f6rp\u00fcl. A Jupiter \u00e9s a Szaturnusz egyes holdjai azonban j\u00f3val nagyobbak, mint a mi Holdunk. A Ganymedes \u00e9s a Tit\u00e1n nagyobbak, mint a Merk\u00far bolyg\u00f3.<\/p>\n

Kis m\u00e9ret\u00fck miatt szinte egyetlen hold sem k\u00e9pes l\u00e9gk\u00f6rt megtartani. Gyenge gravit\u00e1ci\u00f3juk miatt a g\u00e1zok elsz\u00f6knek az \u0171rbe. Az egyetlen kiv\u00e9tel a Tit\u00e1n, a Szaturnusz-rendszer legnagyobb holdja. A Tit\u00e1n l\u00e9gk\u00f6re s\u0171r\u0171bb \u00e9s vastagabb, mint a F\u00f6ld\u00e9. Mindk\u00e9t l\u00e9gk\u00f6r f\u0151 g\u00e1z\u00f6sszetev\u0151je a nitrog\u00e9n, de a Tit\u00e1non nincs oxig\u00e9n \u00e9s nincs \u00e9let sem. Felsz\u00edn\u00e9t narancss\u00e1rga k\u00f6d takarja. Egyes tud\u00f3sok a Tit\u00e1nt egy m\u00e9lyh\u0171t\u00f6tt, primit\u00edv F\u00f6ldnek tekintik.<\/p>\n

Egyes holdak \u2013 k\u00f6zt\u00fck a mi Holdunk is \u2013 feltehet\u0151en a Naprendszer t\u00f6rt\u00e9net\u00e9nek korai szakasz\u00e1ban, hatalmas \u00fctk\u00f6z\u00e9sek sor\u00e1n keletkeztek. A Hold a F\u00f6ld k\u00f6r\u00fcli p\u00e1ly\u00e1n h\u00e1tramaradt t\u00f6rmel\u00e9kfelh\u0151b\u0151l alakult ki. M\u00e1s holdak pedig val\u00f3sz\u00edn\u0171leg abb\u00f3l a g\u00e1z- \u00e9s porfelh\u0151b\u0151l n\u00f6vekedtek ki, amely az \u00f3ri\u00e1sbolyg\u00f3kat vette k\u00f6r\u00fcl, amikor azok anyagot vonzottak magukhoz. A kisebb holdak t\u00f6bbs\u00e9ge olyan \u00fcst\u00f6k\u00f6s vagy aszteroida, amelyet befogtak, amikor t\u00fal k\u00f6zel haladtak el egy nagy bolyg\u00f3 mellett.<\/p>","protected":false},"excerpt":{"rendered":"

Moons are natural objects that orbit planets. Scientists usually refer to them as planetary satellites (human-made satellites are sometimes called artificial moons). There are about 170 moons in our Solar […]<\/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\/2008\/04\/five_saturn_moons2\/17883435-2-eng-GB\/Five_Saturn_moons.jpg","esa_banner_description":"","esa_banner_credit":"NASA \/ JPL","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/04\/Five_Saturn_moons2","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-783","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\/783","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=783"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/783\/revisions"}],"predecessor-version":[{"id":1926,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/783\/revisions\/1926"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=783"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=783"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=783"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=783"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=783"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=783"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=783"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}