{"id":906,"date":"2004-11-19T09:13:00","date_gmt":"2004-11-19T08:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/gravity_and_weightlessness\/"},"modified":"2026-10-08T00:33:36","modified_gmt":"2026-10-07T22:33:36","slug":"gravity_and_weightlessness","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/gravity_and_weightlessness\/","title":{"rendered":"Gravitace a bezt\u00ed\u017en\u00fd stav"},"content":{"rendered":"
\n

Sou\u010d\u00e1st\u00ed na\u0161eho ka\u017edodenn\u00edho \u017eivota jsou \u010dinnosti jako sezen\u00ed, ch\u016fze, zved\u00e1n\u00ed p\u0159edm\u011bt\u016f ze zem\u011b a le\u017een\u00ed v posteli. \u017d\u00e1dn\u00e1 z t\u011bchto \u010dinnost\u00ed nen\u00ed na ob\u011b\u017en\u00e9 dr\u00e1ze mo\u017en\u00e1.<\/p>\n<\/div>\n

Jakmile kosmick\u00e1 lo\u010f dos\u00e1hne ob\u011b\u017en\u00e9 dr\u00e1hy, v\u0161e uvnit\u0159 n\u00ed se jev\u00ed jako bezt\u00ed\u017en\u00e9. Cokoli (nebo kdokoli), co nen\u00ed p\u0159ipout\u00e1no, bude vzn\u00e1\u0161et se.<\/p>\n

Astronauti poprv\u00e9 poc\u00edt\u00ed \u00fa\u010dinek bezt\u00ed\u017ee v okam\u017eiku, kdy se vypnou raketov\u00e9 motory. Okam\u017eit\u011b za\u010dnou vzn\u00e1\u0161et se a dr\u017e\u00ed je na m\u00edst\u011b pouze bezpe\u010dnostn\u00ed p\u00e1sy. D\u00edky bezt\u00ed\u017en\u00e9mu stavu se astronauti jev\u00ed jako mimo\u0159\u00e1dn\u011b siln\u00ed. Dok\u00e1\u017eou zvedat p\u0159edm\u011bty, kter\u00e9 by na Zemi byly p\u0159\u00edli\u0161 t\u011b\u017ek\u00e9 na to, aby je mohli pohnout. M\u00e1 to v\u0161ak i n\u011bkter\u00e9 nev\u00fdhody.<\/p>\n

Bez p\u016fsoben\u00ed gravitace za\u010dne krev a dal\u0161\u00ed t\u011bln\u00ed tekutiny st\u00e9kat sm\u011brem k hlav\u011b. To m\u016f\u017ee vyvolat pocit ucpanosti a bolesti hlavy. Bez gravitace, proti kter\u00e9 by musely bojovat, mohou kosti a svaly oslabnout. Aby si udr\u017eeli kondici, mus\u00ed ka\u017ed\u00fd den cvi\u010dit n\u011bkolik hodin. D\u00edky tomu se po n\u00e1vratu na Zemi zotav\u00ed rychleji.<\/p>\n

V raketopl\u00e1nu nebo na vesm\u00edrn\u00e9 stanici neexistuje naho\u0159e ani dole. Nen\u00ed \u017e\u00e1dn\u00fd rozd\u00edl mezi podlahou a stropem. Astronaut\u016fm z toho m\u016f\u017ee b\u00fdt nevolno, dokud si na tuto podivnou situaci nezvyknou.<\/p>","protected":false},"excerpt":{"rendered":"

Our everyday lives involve such activities as sitting, walking, picking up things from the ground and lying in bed. None of these activities are possible in orbit. Once a spacecraft […]<\/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\/03\/parabolic_flight_picture-72\/17902825-2-eng-GB\/Parabolic_Flight_picture-7.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/03\/Parabolic_Flight_picture-72","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":[10,13,63],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-906","post","type-post","status-publish","format-standard","hentry","category-learn","category-life-in-space","category-living-in-space","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/comments?post=906"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/906\/revisions"}],"predecessor-version":[{"id":2049,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/906\/revisions\/2049"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=906"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=906"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=906"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=906"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=906"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=906"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=906"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}