{"id":823,"date":"2004-12-09T15:52:00","date_gmt":"2004-12-09T14:52:00","guid":{"rendered":"https:\/\/kids.esa.int\/space_velocity\/"},"modified":"2026-10-08T00:32:41","modified_gmt":"2026-10-07T22:32:41","slug":"space_velocity","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/hu\/space_velocity\/","title":{"rendered":"T\u00e9rsebess\u00e9g"},"content":{"rendered":"
\n

A bolyg\u00f3 k\u00f6r\u00fcl kering\u0151 \u00e9gitesteket m\u0171holdaknak nevezz\u00fck. A m\u0171hold \u00e1ltal a bolyg\u00f3 k\u00f6r\u00fcl megtett minden teljes k\u00f6r\u00fatot p\u00e1ly\u00e1nak nevezz\u00fck.<\/p>\n<\/div>\n

F\u00f6ld\u00fcnknek egy term\u00e9szetes holdja van \u2013 a Hold. 1957 okt\u00f3bere \u00f3ta azonban t\u00f6bb ezer mesters\u00e9ges (ember \u00e1ltal k\u00e9sz\u00edtett) m\u0171holdat \u00e1ll\u00edtottak p\u00e1ly\u00e1ra a F\u00f6ld k\u00f6r\u00fcl.<\/p>\n

Ahhoz, hogy p\u00e1ly\u00e1n maradjon, egy m\u0171holdnak nagyon nagy sebess\u00e9ggel kell haladnia, amely a magass\u00e1gt\u00f3l f\u00fcgg. \u00cdgy \u00e1ltal\u00e1ban egy, a F\u00f6ld felsz\u00edn\u00e9t\u0151l 300 km magass\u00e1gban l\u00e9v\u0151 k\u00f6rp\u00e1lya eset\u00e9ben 7,8 km\/s (28 000 km\/h) sebess\u00e9gre van sz\u00fcks\u00e9g. Enn\u00e9l a sebess\u00e9gn\u00e9l a m\u0171hold 90 perc alatt tesz meg egy k\u00f6rt a F\u00f6ld k\u00f6r\u00fcl.<\/p>\n

A m\u0171holdaknak olyan gyorsan kell mozogniuk, hogy ellens\u00falyozz\u00e1k a F\u00f6ld gravit\u00e1ci\u00f3s vonz\u00e1s\u00e1t. Ez hasonl\u00f3 ahhoz, mintha valaki eldobna egy krikett- vagy baseball-labd\u00e1t. Min\u00e9l er\u0151sebben dobj\u00e1k el a labd\u00e1t, ann\u00e1l messzebb rep\u00fcl, miel\u0151tt a f\u00f6ldre \u00e9rne.<\/p>\n

Ha egy j\u00e1t\u00e9kos olyan er\u0151sen tudn\u00e1 eldobni a labd\u00e1t, hogy az el\u00e9rje a sz\u00fcks\u00e9ges sebess\u00e9get, a labda p\u00e1ly\u00e1ra \u00e1llna. Soha t\u00f6bb\u00e9 nem esne vissza a F\u00f6ldre. Ha m\u00e9g er\u0151sebben dobn\u00e1, hogy el\u00e9rje a 11,2 km\/s (40 300 km\/h) sebess\u00e9get \u2013 amelyet \u2018sz\u00f6k\u00e9si sebess\u00e9gnek\u2019 neveznek \u2013, a labda teljesen elhagyn\u00e1 a F\u00f6ldet. Ekkor a Nap \u2018m\u0171holdj\u00e1v\u00e1\u2019 v\u00e1lna.<\/p>","protected":false},"excerpt":{"rendered":"

Objects that travel around a planet are called satellites. Each complete journey a satellite makes around the planet is called an orbit. Our Earth has one natural satellite \u2013 the […]<\/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\/2004\/12\/newton_s_cannon2\/17886950-2-eng-GB\/Newton_s_cannon.gif","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/Newton_s_cannon2","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":[10,65,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-823","post","type-post","status-publish","format-standard","hentry","category-learn","category-mission-control","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/823","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=823"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/823\/revisions"}],"predecessor-version":[{"id":1966,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/823\/revisions\/1966"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=823"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=823"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=823"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=823"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=823"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=823"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=823"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}