{"id":35,"date":"2005-06-30T09:17:00","date_gmt":"2005-06-30T07:17:00","guid":{"rendered":"https:\/\/kids.esa.int\/what_is_gravity\/"},"modified":"2026-10-08T00:23:19","modified_gmt":"2026-10-07T22:23:19","slug":"what_is_gravity","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/what_is_gravity\/","title":{"rendered":"Mis on gravitatsioon?"},"content":{"rendered":"
\n

Kas oled kunagi m\u00f5elnud, miks sa alati p\u00f5rkad maapinnale, olenemata sellest, kui k\u00f5rgele sa h\u00fcppad? Inimesed k\u00fcsisid sama k\u00fcsimust juba 340 aastat tagasi. Siis avastas Briti teadlane Isaac Newton raskusj\u00f5u.<\/p>\n<\/div>\n

128125 Lugu r\u00e4\u00e4gib, kuidas Isaac oli oma aias, kui \u00f5un kukkus talle p\u00e4he. Kui ta oma sinikat h\u00f5\u00f5rus, hakkas ta m\u00f5tlema, miks \u00f5un just teda tabas ja miks see hoopis \u00fclespoole ei lennanud.<\/p>\n

Newtonile tuli m\u00f5te, et mingi n\u00e4htamatu j\u00f5ud peab \u00f5una Maa poole t\u00f5mbama. Ta nimetas seda j\u00f5udu \u201cgravitatsiooniks\u201d \u2013 ladina s\u00f5nast \u201cgravitas\u201d, mis t\u00e4hendab \u201ckaalu\u201d.<\/p>\n

\"Newton's
Newtoni kahur<\/figcaption><\/figure>\n

Newton sai aru, et iga objekt universumis t\u00f5mbab enda poole k\u00f5iki teisi objekte universumis. Isegi \u00f5un avaldab oma \u00fcmbrusele kerget t\u00f5mbej\u00f5udu.<\/p>\n

Just gravitatsioon hoiab Kuud Maa \u00fcmber tiirlemas ning just gravitatsioon v\u00f5imaldab P\u00e4ikesel oma planeetide perekonda koos hoida. P\u00e4ikese ja Kuu t\u00f5mbej\u00f5ud p\u00f5hjustab ka Maa ookeanide loodete tekkimist.<\/p>\n

Siiski s\u00f5ltub gravitatsiooni tugevus objekti suurusest ja tihedusest \u2013 mida teadlased nimetavad \u201cmassiks\u201d. V\u00e4ikese \u00f5una gravitatsioon on liiga n\u00f5rk, et \u00fcletada hiiglasliku Maa t\u00f5mbej\u00f5udu, mist\u00f5ttu see kukub planeedi keskme poole.<\/p>\n

Objekti gravitatsioonij\u00f5ud v\u00e4heneb kauguse suurenemisel sellest. Everesti tipus olev m\u00e4gironija kaalub veidi v\u00e4hem kui merepinna tasandil. Kui kosmoselaev liigub Maast piisavalt kaugele, vabaneb ta l\u00f5puks t\u00e4ielikult planeedi gravitatsioonij\u00f5ust.<\/p>","protected":false},"excerpt":{"rendered":"

Have you ever wondered why you always fall back to the ground with a bump, no matter how high you jump? People were asking the same question 340 years ago. […]<\/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\/2002\/01\/sir_isaac_newton_1642-17272\/17864713-3-eng-GB\/Sir_Isaac_Newton_1642-1727.jpg","esa_banner_description":"Sir Isaac Newton, 1642-1727","esa_banner_credit":"Isaac Newton Institute for Mathematical Studies","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/01\/Sir_Isaac_Newton_1642-17272","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":[10,11,19],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-35","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-story-of-the-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/35","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=35"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/35\/revisions"}],"predecessor-version":[{"id":4271,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/35\/revisions\/4271"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=35"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=35"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=35"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=35"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=35"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=35"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=35"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=35"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=35"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=35"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}