{"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\/ro\/gravity_and_weightlessness\/","title":{"rendered":"Gravita\u021bia \u0219i imponderabilitatea"},"content":{"rendered":"
\n

Via\u021ba noastr\u0103 de zi cu zi implic\u0103 activit\u0103\u021bi precum statul jos, mersul pe jos, ridicarea obiectelor de pe jos \u0219i statul \u00eentins \u00een pat. Niciuna dintre aceste activit\u0103\u021bi nu este posibil\u0103 \u00een orbit\u0103.<\/p>\n<\/div>\n

Odat\u0103 ce o nav\u0103 spa\u021bial\u0103 ajunge pe orbit\u0103, tot ce se afl\u0103 \u00een interiorul ei pare s\u0103 fie \u00een stare de imponderabilitate. Orice obiect (sau persoan\u0103) care nu este fixat va pluti.<\/p>\n

Astronau\u021bii simt pentru prima dat\u0103 efectul imponderabilit\u0103\u021bii atunci c\u00e2nd motoarele rachetei sunt oprite. Imediat, \u00eencep s\u0103 pluteasc\u0103, fiind \u021binu\u021bi pe loc doar de centurile de siguran\u021b\u0103. Imponderabilitatea le permite astronau\u021bilor s\u0103 par\u0103 extrem de puternici. Ei pot ridica obiecte care ar fi mult prea grele pentru a fi mi\u0219cate pe P\u0103m\u00e2nt. Exist\u0103 \u00eens\u0103 \u0219i c\u00e2teva dezavantaje.<\/p>\n

\u00cen absen\u021ba gravita\u021biei, s\u00e2ngele \u0219i alte fluide corporale \u00eencep s\u0103 curg\u0103 spre cap. Acest lucru poate provoca o senza\u021bie de greutate \u0219i dureri de cap. F\u0103r\u0103 for\u021ba gravita\u021bional\u0103 care s\u0103 le opun\u0103 rezisten\u021b\u0103, oasele \u0219i mu\u0219chii se pot sl\u0103bi. Pentru a-\u0219i men\u021bine forma fizic\u0103, astronau\u021bii trebuie s\u0103 fac\u0103 exerci\u021bii fizice c\u00e2teva ore pe zi. Acest lucru le permite s\u0103-\u0219i revin\u0103 mai repede la \u00eentoarcerea pe P\u0103m\u00e2nt.<\/p>\n

\u00centr-o navet\u0103 spa\u021bial\u0103 sau \u00eentr-o sta\u021bie spa\u021bial\u0103, nu exist\u0103 \u201esus\u201d sau \u201ejos\u201d. Nu exist\u0103 nicio diferen\u021b\u0103 \u00eentre podea \u0219i tavan. Acest lucru poate provoca astronau\u021bilor senza\u021bii de r\u0103u p\u00e2n\u0103 c\u00e2nd se obi\u0219nuiesc cu aceast\u0103 situa\u021bie neobi\u0219nuit\u0103.<\/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\/ro\/wp-json\/wp\/v2\/posts\/906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/comments?post=906"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/906\/revisions"}],"predecessor-version":[{"id":2049,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/906\/revisions\/2049"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/media?parent=906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/categories?post=906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/tags?post=906"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/panel?post=906"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/language?post=906"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/age?post=906"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/duration?post=906"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/resource_type?post=906"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/audience?post=906"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/wf_post_folders?post=906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}