{"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\/da\/water_on_mars_but_not_a_drop_to_drink\/","title":{"rendered":"Vand p\u00e5 Mars \u2013 men ikke en dr\u00e5be at drikke"},"content":{"rendered":"
\n

Mars\u2019 overflade er i dag s\u00e5 t\u00f8r som en \u00f8rken, men nye resultater fra ESA\u2019s Mars Express bekr\u00e6fter, at vand har spillet en vigtig rolle i planetens historie. Rumfart\u00f8jets f\u00f8lsomme instrumenter bekr\u00e6fter, at den t\u00f8rre R\u00f8de Planet engang var langt mere fugtig, og at der sandsynligvis findes vandis i store m\u00e6ngder under overfladen.<\/p>\n<\/div>\n

I l\u00f8bet af nogle f\u00e5 uger sidste sommer sendte rumfart\u00f8jets radar radiob\u00f8lger ud, som tr\u00e6ngte igennem overfladen og blev reflekteret tilbage af underjordiske lag. En analyse af disse ekkoer har afsl\u00f8ret buede strukturer, der muligvis udg\u00f8r de ydre kanter af nedgravede nedslagsbassiner.<\/p>\n

\"Hubble's
Hubbles t\u00e6tte m\u00f8de med Mars<\/figcaption><\/figure>\n

En n\u00e6sten cirkul\u00e6r struktur med en diameter p\u00e5 omkring 250 km ligger 1,5 til 2,5 km under det nordlige lavland i Chryse Planitia-omr\u00e5det. Forskere mener, at den muligvis indeholder et tykt lag af materiale, der er rigt p\u00e5 vandis. T\u00e6ttere p\u00e5 Mars\u201c nordpol tyder kraftige ekkoer p\u00e5 tilstedev\u00e6relsen af et n\u00e6sten rent lag af vandis, der er mere end 1 km tykt, og som ligger oven p\u00e5 et lag af vulkansk \u201djord\u00ab.<\/p>\n

MARSIS-radaren er ogs\u00e5 blevet brugt til at unders\u00f8ge den \u00f8verste del af atmosf\u00e6ren \u2013 ionosf\u00e6ren. Ekkoerne viser en st\u00e6rk sammenh\u00e6ng mellem den elektrificerede gass opf\u00f8rsel i dette omr\u00e5de og omr\u00e5der med st\u00e6rk magnetisme i planetens faste skorpe.<\/p>\n

Et andet instrument, kendt som OMEGA, har p\u00e5vist bjergartsmineraler, der er blevet \u00e6ndret af flydende vand. Disse \u2018hydrerede\u2019 mineraler beviser, at der for milliarder af \u00e5r siden fandtes store m\u00e6ngder vand p\u00e5 Mars \u2013 og at forholdene dengang muligvis var egnede til, at liv kunne opst\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\/da\/wp-json\/wp\/v2\/posts\/973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=973"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/973\/revisions"}],"predecessor-version":[{"id":4766,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/973\/revisions\/4766"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=973"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=973"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=973"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=973"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=973"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=973"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=973"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}