{"id":1012,"date":"2010-06-28T14:39:00","date_gmt":"2010-06-28T12:39:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_asteroid_and_the_disappearing_star\/"},"modified":"2026-10-08T00:34:51","modified_gmt":"2026-10-07T22:34:51","slug":"the_asteroid_and_the_disappearing_star","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/the_asteroid_and_the_disappearing_star\/","title":{"rendered":"Asteroiden og den forsvindende stjerne"},"content":{"rendered":"<div class=\"lede\">\n<p>Den 8. juli vil en ret lys stjerne, kendt som Delta Ophiuchi, forsvinde fra nattehimlen. Der er dog ingen grund til bekymring. Stjernen, som kan ses med det blotte \u00f8je, bliver hverken opslugt eller er ved at d\u00f8 \u2013 den bliver blot skjult af en hurtigt bev\u00e6gende asteroide.<\/p>\n<\/div>\n<p>I et par sekunder vil denne lille klippeblok, kendt som (472) Roma, befinde sig p\u00e5 det helt rigtige sted p\u00e5 det helt rigtige tidspunkt til at blokere det stjernelys, der n\u00e5r Jorden. Dette er en sj\u00e6lden begivenhed \u2013 den eneste gang i dette \u00e5rhundrede, hvor det vil v\u00e6re muligt at se en asteroide form\u00f8rke en stjerne uden hj\u00e6lp fra kikkert eller teleskop.<\/p>\n<p>Alle kender til en solform\u00f8rkelse, hvor M\u00e5nen passerer foran Solen, og himlen bliver m\u00f8rk i flere minutter. Selvom M\u00e5nen er 400 gange mindre end Solen, er den ogs\u00e5 400 gange t\u00e6ttere p\u00e5, og derfor kan den d\u00e6kke hele skiven af vores n\u00e6rmeste stjerne.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"364\" data-credit=\"NASA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/07\/A_grazing_occultation_of_Rhea_a_moon_of_Saturn_by_another_moon_Dione2\" 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\/esa_multimedia\/images\/2010\/07\/a_grazing_occultation_of_rhea_a_moon_of_saturn_by_another_moon_dione2\/17872928-2-eng-GB\/A_grazing_occultation_of_Rhea_a_moon_of_Saturn_by_another_moon_Dione.jpg\" alt=\"A grazing occultation of Rhea, a moon of Saturn, by another moon, Dione\"><figcaption>En gr\u00e6nsende okkultation af Rhea, en af Saturns m\u00e5ner, foretaget af en anden m\u00e5ne, Dione<\/figcaption><\/figure>\n<p>Det samme kan ske med stjerner, der befinder sig l\u00e6ngere v\u00e6k. En 50 km bred asteroide som Roma kan kortvarigt skjule en k\u00e6mpe stjerne som Delta Ophiuchi, fordi rumstenen befinder sig meget t\u00e6ttere p\u00e5 os. Begivenheder som denne er vigtige, fordi de giver astronomerne mulighed for at beregne st\u00f8rrelsen og formen p\u00e5 asteroider \u2013 herunder nogle, der en dag m\u00e5ske vil kollidere med Jorden.<\/p>\n<p>Stjernens forsvinden vil kun kunne ses fra en str\u00e6kning p\u00e5 ca. 50 km, der forbinder Stockholm, K\u00f8benhavn, Bremen, Nantes, Bilbao og De Kanariske \u00d8er. Det vil finde sted omkring kl. 23:57 CEST, selvom det n\u00f8jagtige tidspunkt vil variere fra sted til sted.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1008\" data-credit=\"Credits: ESA, created with Guide 8 by Project Pluto http:\/\/www.projectpluto.com\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/07\/Star_chart_showing_the_sky_from_central_Europe2\" 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\/esa_multimedia\/images\/2010\/07\/star_chart_showing_the_sky_from_central_europe2\/18249399-2-eng-GB\/Star_chart_showing_the_sky_from_central_Europe.jpg\" alt=\"Star chart showing the sky from central Europe\"><figcaption>Stjernekort, der viser himlen set fra Centraleuropa<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>On 8 July, a fairly bright star, known as Delta Ophiuchi, will disappear from the night sky. However, there is no need to worry. The naked eye star is not [&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\/2003\/04\/asteroids_come_in_many_shapes_and_sizes2\/17886580-2-eng-GB\/Asteroids_come_in_many_shapes_and_sizes.jpg","esa_banner_description":"Asteroids come in many shapes and sizes","esa_banner_credit":"courtesy Observatoire de Paris","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Asteroids_come_in_many_shapes_and_sizes2","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":[46,10,11],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1012","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1012","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=1012"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1012\/revisions"}],"predecessor-version":[{"id":4795,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1012\/revisions\/4795"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1012"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1012"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1012"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1012"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1012"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1012"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1012"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}