{"id":877,"date":"2005-06-30T09:24:00","date_gmt":"2005-06-30T07:24:00","guid":{"rendered":"https:\/\/kids.esa.int\/esa_s_gravity_explorer\/"},"modified":"2026-10-08T00:33:17","modified_gmt":"2026-10-07T22:33:17","slug":"esa_s_gravity_explorer","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/ro\/esa_s_gravity_explorer\/","title":{"rendered":"Gravity Explorer al ESA"},"content":{"rendered":"
\n

Conform unui nou studiu al ESA, cutremurul din Sumatra din 26 decembrie 2004 nu numai c\u0103 a devastat o zon\u0103 imens\u0103, dar a \u0219i modificat u\u0219or gravita\u021bia acelei zone.<\/p>\n<\/div>\n

C\u00e2nd, \u00een timpul cutremurului, fundul Oceanului Indian s-a deplasat de-a lungul unei falii de 1000 km, s-a format o teras\u0103 de 6 metri \u00een\u0103l\u021bime. Aceast\u0103 mi\u0219care uria\u0219\u0103 a rocilor a modificat instantaneu gravita\u021bia local\u0103.<\/p>\n

Acest lucru nu este neobi\u0219nuit. H\u0103r\u021bile realizate pe baza datelor satelitare arat\u0103 c\u0103 for\u021ba gravita\u021bional\u0103 variaz\u0103 de la un loc la altul. Una dintre cauzele acestui fenomen este rota\u021bia P\u0103m\u00e2ntului. Pe m\u0103sur\u0103 ce planeta se rote\u0219te, se umfl\u0103 spre exterior la ecuator. Deoarece P\u0103m\u00e2ntul este cu 42 km mai lat la ecuator, for\u021ba gravita\u021bional\u0103 este mai slab\u0103 acolo dec\u00e2t la poli.<\/p>\n

Mun\u021bii \u00eenal\u021bi, \u0219an\u021burile oceanice ad\u00e2nci \u0219i diferitele tipuri de roci din interiorul P\u0103m\u00e2ntului au, de asemenea, un impact. Chiar \u0219i mareele, curen\u021bii oceanici \u0219i topirea calotelor glaciare determin\u0103 varia\u021bii ale valorii gravita\u021biei.<\/p>\n

\"Artist's
Reprezentare artistic\u0103 a satelitului GOCE<\/figcaption><\/figure>\n

\u00cen prezent, aceste mici varia\u021bii ale gravita\u021biei sunt greu de m\u0103surat, dar situa\u021bia se va schimba odat\u0103 cu lansarea, anul viitor, a satelitului Gravity Field and Ocean Circulation Explorer (GOCE) al ESA.<\/p>\n

Nava spa\u021bial\u0103 sensibil\u0103 va studia gravita\u021bia \u00een detaliu. Pe m\u0103sur\u0103 ce va traversa regiuni cu o atrac\u021bie gravita\u021bional\u0103 mai puternic\u0103 sau mai slab\u0103, nava spa\u021bial\u0103 se va mi\u0219ca \u00een sus \u0219i \u00een jos, iar instrumentele sale vor \u00eenregistra varia\u021biile c\u00e2mpului gravita\u021bional de-a lungul traiectoriei sale.<\/p>\n

Acest lucru le va permite oamenilor de \u0219tiin\u021b\u0103 s\u0103 m\u0103soare cantitatea de material care se deplaseaz\u0103, fie brusc, \u00een cazul unui cutremur, fie treptat, cum ar fi \u00een cazul topirii unui strat de ghea\u021b\u0103. Datele vor contribui chiar la identificarea schimb\u0103rilor \u00een circula\u021bia oceanic\u0103 care sunt legate de schimb\u0103rile climatice.<\/p>","protected":false},"excerpt":{"rendered":"

According to a new ESA study, the Sumatran earthquake of 26 December 2004 not only devastated a huge area, but it slightly altered the gravity of that area. When 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\/2005\/04\/ers-2_composite_highlighting_tsunami_damage3\/17891576-2-eng-GB\/ERS-2_composite_highlighting_tsunami_damage.jpg","esa_banner_description":"ERS-2 composite highlighting tsunami damage","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/04\/ERS-2_composite_highlighting_tsunami_damage3","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":[42,10,59],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-877","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-natural-disasters"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/877","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=877"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/877\/revisions"}],"predecessor-version":[{"id":4715,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/877\/revisions\/4715"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/media?parent=877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/categories?post=877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/tags?post=877"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/panel?post=877"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/language?post=877"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/age?post=877"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/duration?post=877"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/resource_type?post=877"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/audience?post=877"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/wf_post_folders?post=877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}