{"id":705,"date":"2012-10-29T08:57:00","date_gmt":"2012-10-29T07:57:00","guid":{"rendered":"https:\/\/kids.esa.int\/new_satellite_to_study_alien_planets\/"},"modified":"2026-10-08T00:31:20","modified_gmt":"2026-10-07T22:31:20","slug":"new_satellite_to_study_alien_planets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/new_satellite_to_study_alien_planets\/","title":{"rendered":"Ny satellit f\u00f6r att unders\u00f6ka fr\u00e4mmande planeter"},"content":{"rendered":"<div class=\"lede\">\n<p>Fr\u00e5n jorden kan vi ibland se Venus och Merkurius som svarta fl\u00e4ckar som passerar framf\u00f6r solen. Under s\u00e5dana h\u00e4ndelser \u2013 som kallas transiter \u2013 skymmer planeten en liten del av ljuset, vilket g\u00f6r att solen verkar n\u00e5got svagare. Liknande f\u00f6rm\u00f6rkningar kan orsakas av exoplaneter \u2013 v\u00e4rldar som kretsar kring stj\u00e4rnor l\u00e4ngre bort. Nu har ESA beslutat att utveckla ett nytt vetenskapligt uppdrag f\u00f6r att s\u00f6ka efter dessa transiter.<\/p>\n<\/div>\n<p>Uppdraget, som g\u00e5r under namnet CHEOPS (en f\u00f6rkortning av CHaracterising ExOPlanets Satellite), f\u00f6rv\u00e4ntas skjutas upp under 2017. Det kommer att inriktas p\u00e5 ljusa, n\u00e4rbel\u00e4gna stj\u00e4rnor som man redan vet har n\u00e5gra planeter i omloppsbana runt sig. Rymdfarkosten kommer att \u00f6vervaka varje stj\u00e4rnas ljusstyrka med h\u00f6g precision och s\u00f6ka efter de tydliga tecknen p\u00e5 en transit.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"537\" data-credit=\"CNES\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/10\/Planet_transit_in_front_of_a_star2\" 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\/2012\/10\/planet_transit_in_front_of_a_star2\/17868969-2-eng-GB\/Planet_transit_in_front_of_a_star.jpg\" alt=\"Planet transit in front of a star\"><figcaption>Planet som passerar framf\u00f6r en stj\u00e4rna<\/figcaption><\/figure>\n<p>Genom en detaljerad analys av f\u00f6r\u00e4ndringarna i det inkommande stj\u00e4rnljuset g\u00e5r det att m\u00e4ta diametern p\u00e5 varje planet som passerar framf\u00f6r sin stj\u00e4rna med mycket h\u00f6g noggrannhet. F\u00f6r de planeter vars massa \u00e4r k\u00e4nd kommer det att vara m\u00f6jligt att ber\u00e4kna deras densitet, vilket ger ledtr\u00e5dar om deras inre struktur.<\/p>\n<p>Kunskap om exoplaneternas storlek och massa kommer att hj\u00e4lpa forskarna att f\u00f6rst\u00e5 hur planeter bildas, fr\u00e5n planeter med en massa som \u00e4r n\u00e5gra g\u00e5nger st\u00f6rre \u00e4n jordens \u2013 s\u00e5 kallade \u2019superjordar\u2018 \u2013 till v\u00e4rldar av Neptunus storlek. Det kommer ocks\u00e5 att g\u00f6ra det m\u00f6jligt att identifiera planeter med betydande atmosf\u00e4rer, vilka kommer att utg\u00f6ra idealiska m\u00e5l f\u00f6r mer detaljerade studier med n\u00e4sta generations teleskop. Dessa inkluderar det markbaserade European Extremely Large Telescope och James Webb-rymdteleskopet.<\/p>\n<p>CHEOPS utvecklas av ESA och Schweiz, och \u00e4ven n\u00e5gra andra ESA-medlemsstater deltar i projektet. Satelliten kommer att kretsa i en n\u00e4stan pol\u00e4r bana, cirka 800 km ovanf\u00f6r jorden, och vara i drift i 3 \u00bd \u00e5r.<\/p>","protected":false},"excerpt":{"rendered":"<p>From Earth, we can sometimes see Venus and Mercury as black spots passing across the Sun. During such events \u2013 called transits &#8211; the planet blocks a tiny amount of [&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\/2012\/10\/artist_impression_of_cheops2\/17900088-2-eng-GB\/Artist_impression_of_Cheops.jpg","esa_banner_description":"Artist impression of Cheops","esa_banner_credit":"University of Bern","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/10\/Artist_impression_of_Cheops2","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-705","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/705","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=705"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/705\/revisions"}],"predecessor-version":[{"id":4640,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/705\/revisions\/4640"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=705"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=705"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=705"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=705"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=705"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=705"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=705"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}