{"id":1031,"date":"2005-05-02T12:13:00","date_gmt":"2005-05-02T10:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/radar_to_reveal_hidden_mars\/"},"modified":"2026-10-08T00:35:05","modified_gmt":"2026-10-07T22:35:05","slug":"radar_to_reveal_hidden_mars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/radar_to_reveal_hidden_mars\/","title":{"rendered":"Radar skal avsl\u00f8re det skjulte Mars"},"content":{"rendered":"
\n

Et nytt kapittel i utforskningen av Mars st\u00e5r foran oss. Etter en lang forsinkelse er MARSIS-radarinstrumentet om bord p\u00e5 ESAs romsonde Mars Express i ferd med \u00e5 settes i drift.<\/p>\n<\/div>\n

MARSIS er det f\u00f8rste instrumentet som er utviklet for \u00e5 se under den oransjer\u00f8de overflaten p\u00e5 Mars. Det fungerer ved \u00e5 sende ut lavfrekvente radiosignaler.<\/p>\n

Mange av disse reflekteres rett tilbake fra overflaten. Men noen signaler trenger ned i bakken og reflekteres fra lag under overflaten.<\/p>\n

Ved \u00e5 analysere disse ekkoene h\u00e5per forskerne \u00e5 finne is eller vann under jorden. Dette er viktig, fordi liv vanligvis er knyttet til tilstedev\u00e6relsen av vann.<\/p>\n

MARSIS vil ogs\u00e5 kartlegge bergartslag ned til en dybde p\u00e5 flere kilometer og m\u00e5le h\u00f8yden p\u00e5 fjell og daler.<\/p>\n

\"MARSIS
MARSIS\u2019 hovedantenne<\/figcaption><\/figure>\n

F\u00f8r dette kan skje, m\u00e5 radarens tre stanglignende armer foldes ut. Disse skulle egentlig ha blitt sluppet ut i april 2004, men det var en viss bekymring for at de kunne sette seg fast eller sprette tilbake og skade romfart\u00f8yet.<\/p>\n

\u201cSlike operasjoner kan ikke demonstreres p\u00e5 jorden,\u201d forklarte John Reddy fra ESA. \u201cDerfor m\u00e5 vi stole p\u00e5 datasimuleringer, med mindre de kan testes i rommet.\u201d<\/p>\n

Etter en grundig analyse av risikoene har ESA besluttet \u00e5 gjennomf\u00f8re eksperimentet. De to 20 meter lange bomene vil bli satt ut f\u00f8rst, etterfulgt av den 7 meter lange bommen noen dager senere. Dette forventes \u00e5 finne sted mellom 2. og 12. mai.<\/p>\n

N\u00e5r utplasseringen er fullf\u00f8rt, skal MARSIS gjennomg\u00e5 tre ukers testing. Deretter starter den spennende radars\u00f8kningen.<\/p>","protected":false},"excerpt":{"rendered":"

A new chapter in the exploration of Mars is about to begin. After a long delay, the MARSIS radar instrument on board ESA\u2019s Mars Express orbiter is about to swing […]<\/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\/2001\/08\/marsis_prospecting_for_water2\/17863678-3-eng-GB\/MARSIS_prospecting_for_water.jpg","esa_banner_description":"MARSIS prospecting for water","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/08\/MARSIS_prospecting_for_water2","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":[10,11,12],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1031","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1031","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=1031"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1031\/revisions"}],"predecessor-version":[{"id":4806,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1031\/revisions\/4806"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=1031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=1031"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=1031"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=1031"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=1031"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=1031"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=1031"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=1031"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=1031"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=1031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}