{"id":820,"date":"2004-12-02T15:35:00","date_gmt":"2004-12-02T14:35:00","guid":{"rendered":"https:\/\/kids.esa.int\/gravity_assists\/"},"modified":"2026-10-08T00:32:39","modified_gmt":"2026-10-07T22:32:39","slug":"gravity_assists","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/gravity_assists\/","title":{"rendered":"Gravitatsiooniabi"},"content":{"rendered":"
\n

Nagu teate, kipub auto m\u00e4est \u00fcles s\u00f5ites aeglustuma ja m\u00e4est alla s\u00f5ites kiirendama. V\u00f5ib \u00f6elda, et auto saab \u2018gravitatsiooniabi\u2019, kuna Maa gravitatsioon aitab tal aeglustuda v\u00f5i kiirendada. Samamoodi on ka kosmoselaeval v\u00f5imalik saada tasuta s\u00f5itu, ilma et ta peaks kulutama v\u00e4\u00e4rtuslikku k\u00fctust.<\/p>\n<\/div>\n

Gravitatsiooniline kiirendus toimub siis, kui kosmoselaev lendab planeedi v\u00f5i suure kuu juurest m\u00f6\u00f6da. See v\u00f5imaldab planeedi gravitatsioonil kosmoselaeva enda poole t\u00f5mmata ja selle orbiiti muuta.<\/p>\n

M\u00f5nikord kiirendab kosmoselaev s\u00f5itu, m\u00f5nikord aeglustab \u2013 s\u00f5ltuvalt sellest, kas ta m\u00f6\u00f6dub planeedist tagant v\u00f5i eest. Gravitatsiooniline abij\u00f5ud muudab ka kosmoselaeva liikumissuunda.<\/p>\n

\u00dcks k\u00f5ige h\u00e4mmastavamaid gravitatsioonilisi kiirendusi kasutati ESA missioonil \u201eUlysses\u201d. Lendades \u00fcle Jupiteri p\u00f5hjapooluse, paisati \u201eUlysses\u201d orbiidile, mis viis ta \u00fcle P\u00e4ikese pooluste.<\/p>\n

Cassini-Huygensi missioon kasutas teel Saturnile nelja gravitatsioonilist abij\u00f5udu (\u00fcks Maa, kaks Veenuse ja \u00fcks Jupiteri puhul).<\/p>\n

Raskusj\u00f5ud m\u00e4ngis olulist rolli ka ESA missioonis SMART-1. P\u00e4rast 14 kuud kestnud spiraalset liikumist Maalt eemale hakkas kosmoselaev tundma Kuu t\u00f5mmet. 2004. aasta novembris haaras Kuu raskusj\u00f5ud SMART-1 endasse ja see asus Kuu orbiidile.<\/p>","protected":false},"excerpt":{"rendered":"

As you know, a car tends to slow down when it goes up a mountain and to accelerate when it is going downhill. One can say that the car is […]<\/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\/08\/ulysses_and_the_heliosphere2\/17889541-2-eng-GB\/Ulysses_and_the_heliosphere.jpg","esa_banner_description":"Ulysses and the heliosphere","esa_banner_credit":"ESA (image by D. Hardy)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/08\/Ulysses_and_the_heliosphere2","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-820","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\/et\/wp-json\/wp\/v2\/posts\/820","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=820"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/820\/revisions"}],"predecessor-version":[{"id":1963,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/820\/revisions\/1963"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=820"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=820"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=820"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=820"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=820"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=820"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=820"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}