{"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\/de\/the_asteroid_and_the_disappearing_star\/","title":{"rendered":"Der Asteroid und der verschwindende Stern"},"content":{"rendered":"
\n

Am 8. Juli wird ein recht heller Stern, den wir unter dem Namen Delta Ophiuchi kennen, vom Nachthimmel verschwinden. Das ist allerdings kein Grund zur Beunruhigung. Der f\u00fcr das blo\u00dfe Auge sichtbare Stern wird weder aufgefressen noch stirbt er - er wird lediglich von einem schnellen Asteroiden verdeckt.<\/p>\n<\/div>\n

For a few seconds, this small chunk of rock, known as (472) Roma, will be in just the right place at the right time to block the starlight coming to Earth. This is a rare event – the only time this century when it will be possible to see an asteroid eclipse a star without the help of binoculars or a telescope.<\/p>\n

Wir alle kennen das Prinzip der Sonnenfinsternis, wenn sich unser Mond vor die Sonne schiebt und sich der Himmel einige Minuten lang verdunkelt. Der Mond ist zwar 400-mal kleiner als die Sonne, aber auch 400-mal n\u00e4her. Deshalb kann er die gesamte Scheibe unseres n\u00e4chsten Sterns verdecken.<\/p>\n

\"A
A grazing occultation of Rhea, a moon of Saturn, by another moon, Dione<\/figcaption><\/figure>\n

Dasselbe kann mit weiter entfernten Sternen geschehen. Ein Asteroid mit einem Durchmesser von 50 km, wie Roma, ist in der Lage, einen riesigen Stern wie Delta Ophiuchi kurz zu verbergen, da uns der Weltraumgesteinsklumpen wesentlich n\u00e4her liegt. Ereignisse wie dieses sind wichtig, da sie Astronomen die Gelegenheit bieten, die Gr\u00f6\u00dfe und Form von Asteroiden zu untersuchen - einschlie\u00dflich solcher, die eines Tages mit der Erde zusammensto\u00dfen k\u00f6nnten.<\/p>\n

Das Verschwinden des Sterns ist nur von einem Pfad aus sichtbar, der rund 50 km breit ist und Stockholm mit Kopenhagen, Bremen, Nantes, Bilbao und den Kanarischen Inseln verbindet. Die Finsternis wird ungef\u00e4hr um 23:57 Uhr MESZ stattfinden, wobei die genaue Zeit vom jeweiligen Betrachtungsort abh\u00e4ngig ist.<\/p>\n

\"Star
Star chart showing the sky from central Europe<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"

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 […]<\/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\/de\/wp-json\/wp\/v2\/posts\/1012","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/comments?post=1012"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/posts\/1012\/revisions"}],"predecessor-version":[{"id":4795,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/posts\/1012\/revisions\/4795"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/media?parent=1012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/categories?post=1012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/tags?post=1012"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/panel?post=1012"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/language?post=1012"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/age?post=1012"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/duration?post=1012"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/resource_type?post=1012"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/audience?post=1012"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/de\/wp-json\/wp\/v2\/wf_post_folders?post=1012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}