{"id":973,"date":"2005-12-05T10:52:00","date_gmt":"2005-12-05T09:52:00","guid":{"rendered":"https:\/\/kids.esa.int\/water_on_mars_but_not_a_drop_to_drink\/"},"modified":"2026-10-08T00:34:23","modified_gmt":"2026-10-07T22:34:23","slug":"water_on_mars_but_not_a_drop_to_drink","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/water_on_mars_but_not_a_drop_to_drink\/","title":{"rendered":"Vatten p\u00e5 Mars \u2013 men inte en droppe att dricka"},"content":{"rendered":"
\n

Mars yta \u00e4r idag torr som en \u00f6ken, men nya resultat fr\u00e5n ESA:s Mars Express bekr\u00e4ftar att vatten har spelat en viktig roll i planetens historia. Rymdfarkostens k\u00e4nsliga instrument bekr\u00e4ftar att den torra R\u00f6da planeten en g\u00e5ng var betydligt fuktigare, och att vattenis troligen f\u00f6rekommer i stor utstr\u00e4ckning under ytan.<\/p>\n<\/div>\n

Under n\u00e5gra veckor f\u00f6rra sommaren s\u00e4nde rymdsondens radarinstrument ut radiosignaler som tr\u00e4ngde igenom ytan och reflekterades tillbaka av underjordiska lager. Analysen av dessa ekon har avsl\u00f6jat b\u00f6jda strukturer som kan vara de yttre kanterna p\u00e5 begravda nedslagsbass\u00e4nger.<\/p>\n

\"Hubble's
Hubbles n\u00e4ra m\u00f6te med Mars<\/figcaption><\/figure>\n

En n\u00e4stan cirkelformad struktur, med en diameter p\u00e5 cirka 250 km, ligger 1,5 till 2,5 km under de norra l\u00e5glandet i Chryse Planitia-regionen. Forskarna tror att den kan inneh\u00e5lla ett tjockt lager av material som \u00e4r rikt p\u00e5 vattenis. N\u00e4rmare Mars nordpol tyder starka ekon p\u00e5 f\u00f6rekomsten av ett n\u00e4stan rent lager av vattenis, mer \u00e4n 1 km tjockt, som ligger ovanp\u00e5 ett lager av vulkanisk \u201cjord\u201d.<\/p>\n

MARSIS-radarn har ocks\u00e5 anv\u00e4nts f\u00f6r att studera den \u00f6vre delen av atmosf\u00e4ren \u2013 jonosf\u00e4ren. Ekon visar p\u00e5 ett starkt samband mellan beteendet hos den joniserade gasen i detta omr\u00e5de och omr\u00e5den med stark magnetism i planetens fasta skorpa.<\/p>\n

Ett annat instrument, kallat OMEGA, har uppt\u00e4ckt bergartsmineraler som har f\u00f6r\u00e4ndrats av flytande vatten. Dessa \u2018hydrerade\u2019 mineraler bevisar att det fanns stora m\u00e4ngder vatten p\u00e5 Mars f\u00f6r miljarder \u00e5r sedan \u2013 och att f\u00f6rh\u00e5llandena d\u00e5 kan ha varit l\u00e4mpliga f\u00f6r att liv skulle kunna uppst\u00e5.<\/p>","protected":false},"excerpt":{"rendered":"

The surface of Mars is now as dry as a desert, but new results from ESA\u2019s Mars Express confirm that water has played an important role in the planet\u2019s history. […]<\/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\/11\/mars_express_s_omega_instrument_adds_detail_to_candor_chasma3\/17911528-2-eng-GB\/Mars_Express_s_OMEGA_instrument_adds_detail_to_Candor_Chasma.jpg","esa_banner_description":"Mars Express's OMEGA instrument adds detail to Candor Chasma","esa_banner_credit":"ESA\/OMEGA\/HRSC","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/11\/Mars_Express_s_OMEGA_instrument_adds_detail_to_Candor_Chasma3","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-973","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\/sv\/wp-json\/wp\/v2\/posts\/973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=973"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/973\/revisions"}],"predecessor-version":[{"id":4766,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/973\/revisions\/4766"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=973"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=973"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=973"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=973"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=973"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=973"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=973"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}