{"id":661,"date":"2008-07-04T09:36:00","date_gmt":"2008-07-04T07:36:00","guid":{"rendered":"https:\/\/kids.esa.int\/can_et_hear_the_sounds_of_earth\/"},"modified":"2026-10-08T00:30:51","modified_gmt":"2026-10-07T22:30:51","slug":"can_et_hear_the_sounds_of_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/can_et_hear_the_sounds_of_earth\/","title":{"rendered":"Kan ET h\u00f8re lydene fra Jorden?"},"content":{"rendered":"<div class=\"lede\">\n<p>ESAs fire \u201cCluster\u201d-romfart\u00f8yer har oppdaget at Jorden og andre planeter har en m\u00e5te \u00e5 rope \u00abJeg er her!\u00bb til resten av galaksen p\u00e5. Meldingen fra planetene kan imidlertid bare oppfattes og forst\u00e5s ved hjelp av store radioteleskoper. En fremmed rase som fanger opp Jordens naturlige radiosignaler, vil h\u00f8re en rekke pip og fl\u00f8yte lyder, litt som \u00e5 lytte til R2-D2, roboten fra \u00abStar Wars\u00bb.<\/p>\n<\/div>\n<p>Forel\u00f8pig er ikke engang de mest moderne teleskopene kraftige nok til \u00e5 oppdage planeter p\u00e5 st\u00f8rrelse med Jorden rundt fjerne stjerner. Utenomjordiske astronomer st\u00e5r overfor det samme problemet \u2013 \u00e5 lete etter Jorden ville v\u00e6re som \u00e5 lete etter en n\u00e5l i en h\u00f8ystakk. Men radioutslippene fra v\u00e5r planet \u2013 som er 10 000 ganger sterkere enn det kraftigste milit\u00e6re radarsignalet \u2013 avsl\u00f8rer tydelig Jordens tilstedev\u00e6relse.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/Media\/Animations\/Auroral-2HQ\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/media\/animations\/auroral-2hq\/9257-5-eng-GB\/Auroral-2HQ.jpg\" alt=\"\"><\/figure>\n<p>Forskere har siden 1970-tallet visst at planeter med magnetfelt (blant annet Jorden, Jupiter og Saturn) sender ut sterke radiosignaler. Utsendelsene genereres h\u00f8yt over hver planet av de samme solpartiklene som f\u00e5r nordlys til \u00e5 lyse opp himmelen under. Inntil n\u00e5 hadde astronomer antatt at disse radiob\u00f8lgene beveget seg ut i rommet i en stadig bredere kjegle, som lyset fra en lommelykt. Takket v\u00e6re Cluster vet vi n\u00e5 at dette ikke stemmer.<\/p>\n<p>N\u00e5r radiob\u00f8lgene skyllet over hvert romfart\u00f8y etter tur, kunne forskerne beregne deres st\u00f8rrelse og posisjon. Det viser seg at signalene beveger seg gjennom rommet i en smal str\u00e5le. Dette gj\u00f8r det mye enklere \u00e5 finne ut n\u00f8yaktig hvor de kommer fra. I fremtiden kan vi kanskje oppdage fremmede verdener ved \u00e5 lytte etter deres pip og fl\u00f8yte.<\/p>","protected":false},"excerpt":{"rendered":"<p>ESA\u2019s four Cluster spacecraft have found that Earth and other planets have a way of shouting \u201cI\u2019m here!\u201d to the rest of the Galaxy. However, the messages from the planets [&hellip;]<\/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\/2002\/08\/the_cluster_constellation\/17863826-3-eng-GB\/The_Cluster_constellation.jpg","esa_banner_description":"The Cluster constellation","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/08\/The_Cluster_constellation","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":[14,10,13],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-661","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/661","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=661"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/661\/revisions"}],"predecessor-version":[{"id":4616,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/661\/revisions\/4616"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=661"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=661"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=661"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=661"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=661"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=661"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=661"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}