{"id":582,"date":"2010-10-27T08:10:00","date_gmt":"2010-10-27T06:10:00","guid":{"rendered":"https:\/\/kids.esa.int\/cluster_explores_invisible_space\/"},"modified":"2026-10-08T00:29:54","modified_gmt":"2026-10-07T22:29:54","slug":"cluster_explores_invisible_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/cluster_explores_invisible_space\/","title":{"rendered":"Cluster udforsker det usynlige rum"},"content":{"rendered":"
\n

I sommeren 2000 blev fire identiske Cluster-rumfart\u00f8jer sendt op i meget langstrakte pol\u00e6re baner, der f\u00f8rte dem en tredjedel af vejen til M\u00e5nen. Siden da har ESA-kvartetten \u2013 kendt som Salsa, Samba, Rumba og Tango \u2013 fl\u00f8jet i formation omkring Jorden. Nogle gange har de befundet sig inden for planetens magnetfelt. Andre gange har de forladt magnetosf\u00e6ren og fl\u00f8jet gennem solvindens elektrisk ladede partikler.<\/p>\n<\/div>\n

I takt med at deres baner og indbyrdes afstande har \u00e6ndret sig, har rumfart\u00f8jerne leveret de f\u00f8rste 3D-observationer af de usynlige partikler og magnetfelter, der findes i rummet t\u00e6t p\u00e5 Jorden. Et omr\u00e5de af s\u00e6rlig interesse har v\u00e6ret nordlyset, et r\u00f8dt og gr\u00f8nt lysgardin, der ses p\u00e5 nattehimlen over polarregionerne. Nordlys opst\u00e5r, n\u00e5r supersoniske partikler fra Solen kolliderer med vores planets magnetfelt. De fleste afb\u00f8jes af Jordens magnetiske skjold, men nogle bryder igennem og fanges.<\/p>\n

\"Effect
Virkningen af ekstrem solaktivitet p\u00e5 Jordens magnetosf\u00e6re<\/figcaption><\/figure>\n

Disse partikler bev\u00e6ger sig i spiral ned ad magnetfeltlinjerne og kolliderer med den \u00f8vre atmosf\u00e6re, hvilket skaber nordlyset. Imidlertid opst\u00e5r der undertiden m\u00f8rke \u2018huller\u2019 \u2013 kaldet sorte nordlys \u2013 i det farverige forh\u00e6ng. Cluster har fundet ud af, at disse opst\u00e5r d\u00e9r, hvor partiklerne undslipper opad ud i rummet i stedet for at bev\u00e6ge sig nedad ind i atmosf\u00e6ren.<\/p>\n

Cluster har gjort mange andre opdagelser, s\u00e5som gigantiske hvirvelstr\u00f8mme, der spr\u00f8jter partikler ind i Jordens magnetfelt. Den har ogs\u00e5 afsl\u00f8ret, hvordan \u2018dr\u00e6berelektroner\u2019 bliver s\u00e5 energirige, at de kan s\u00e6tte rumfart\u00f8jer i kredsl\u00f8b ud af drift eller \u00f8del\u00e6gge dem.<\/p>\n

De fire satellitter er alle ved at v\u00e6re lidt slidte, men Cluster-teamet er overbevist om, at de kan fungere mindst indtil 2016. I mellemtiden ser forskere fra hele verden frem til at forts\u00e6tte deres udforskning af det usynlige rum omkring Jorden.<\/p>","protected":false},"excerpt":{"rendered":"

In the summer of 2000, four identical Cluster spacecraft were launched into highly elongated polar orbits which took them one third of the way to the Moon. Since then, 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\/2000\/08\/the_four_cluster_spacecraft2\/17866490-3-eng-GB\/The_four_Cluster_spacecraft.jpg","esa_banner_description":"The four Cluster spacecraft","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2000\/08\/The_four_Cluster_spacecraft2","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":[10,11,35],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-582","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-the-sun"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/582","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=582"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/582\/revisions"}],"predecessor-version":[{"id":4561,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/582\/revisions\/4561"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=582"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=582"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=582"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=582"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=582"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=582"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=582"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}