{"id":261,"date":"2019-12-03T13:07:32","date_gmt":"2019-12-03T12:07:32","guid":{"rendered":"https:\/\/kids.esa.int\/esa_s_cheops_satellite_will_measure_the_sizes_of_exoplanets\/"},"modified":"2026-10-08T00:26:09","modified_gmt":"2026-10-07T22:26:09","slug":"esa_s_cheops_satellite_will_measure_the_sizes_of_exoplanets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/esa_s_cheops_satellite_will_measure_the_sizes_of_exoplanets\/","title":{"rendered":"ESA:s satellit CHEOPS kommer att m\u00e4ta storleken p\u00e5 exoplaneter"},"content":{"rendered":"<div class=\"lede\">\n<p>Har du n\u00e5gonsin tittat upp mot natthimlen och undrat om det finns andra planeter d\u00e4r ute, bortom v\u00e5rt solsystem? Astronomer har uppt\u00e4ckt att det finns det! Vi kallar dem extrasol\u00e4ra planeter, eller exoplaneter i kortform. Hittills har man hittat tusentals, och det antalet kommer bara att \u00f6ka i takt med att vi forts\u00e4tter s\u00f6kandet.<\/p>\n<p>Det \u00e4r mycket sv\u00e5rt att ta en faktisk bild av en exoplanet, eftersom de befinner sig s\u00e5 l\u00e5ngt bort. Ist\u00e4llet anv\u00e4nder astronomer olika metoder f\u00f6r att uppt\u00e4cka dem, till exempel genom att observera hur stj\u00e4rnorna svajar i rymden p\u00e5 grund av gravitationen fr\u00e5n exoplaneter som kretsar kring dem. Denna metod, tillsammans med andra, hj\u00e4lper oss inte bara att hitta dessa planeter, utan g\u00f6r det ocks\u00e5 m\u00f6jligt f\u00f6r astronomer att ber\u00e4kna exoplaneternas massa och hur l\u00e5ngt bort de kretsar fr\u00e5n sina stj\u00e4rnor. Vad vi nu beh\u00f6ver \u00e4r ett teleskop som \u00e4r specialiserat p\u00e5 att ber\u00e4tta hur stora exoplaneterna \u00e4r. Det \u00e4r h\u00e4r CHEOPS kommer in i bilden!<\/p>\n<\/div>\n<p>CHEOPS \u2013 vars fullst\u00e4ndiga namn \u00e4r CHaracterising ExOPlanet Satellite \u2013 lanserades i december 2019 och \u00e4r ett ESA-uppdrag som syftar till att hj\u00e4lpa oss att l\u00e4ra oss mer om exoplaneter. I st\u00e4llet f\u00f6r att s\u00f6ka efter nya exoplaneter kommer CHEOPS att studera de exoplaneter som vi redan har uppt\u00e4ckt och f\u00f6r vilka planetens massa har ber\u00e4knats.<\/p>\n<p>CHEOPS har ett h\u00f6gteknologiskt och extremt k\u00e4nsligt instrument som kallas fotometer och som m\u00e4ter ljusintensiteten. N\u00e4r en exoplanet passerar framf\u00f6r sin stj\u00e4rna och skymmer en del av dess ljus kommer CHEOPS att m\u00e4ta hur mycket stj\u00e4rnans ljusstyrka minskar. P\u00e5 s\u00e5 s\u00e4tt kan uppdragets forskare ber\u00e4kna exoplanetens storlek! Kombinerar man den informationen med data om massan blir det m\u00f6jligt att ber\u00e4kna exoplaneternas densitet. Det ger ledtr\u00e5dar till vad planeterna best\u00e5r av. \u00c4r de stenplaneter eller gasj\u00e4ttar? Kan de till och med ha stora hav?<\/p>\n<figure class=\"wp-block-embed is-type-video\"><iframe src=\"https:\/\/www.youtube.com\/embed\/O9wm0IB3LMA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/figure>\n<figure class=\"wp-block-image size-large\" data-width=\"2500\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2019\/02\/What_kind_of_planets_will_Cheops_study\" 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\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2019\/02\/what_kind_of_planets_will_cheops_study\/19220443-1-eng-GB\/What_kind_of_planets_will_Cheops_study.jpg\" alt=\"What kind of planets will Cheops study?\" \/><figcaption>Vilka slags planeter kommer Cheops att unders\u00f6ka?<\/figcaption><\/figure>\n<p>Med hj\u00e4lp av denna information kommer forskarna att kunna sammanst\u00e4lla en lista \u00f6ver de exoplaneter som har st\u00f6rst sannolikhet att ha atmosf\u00e4rer. Dessa kommer att utg\u00f6ra utm\u00e4rkta observationsm\u00e5l f\u00f6r framtida astronomer, som med \u00e4nnu kraftfullare teleskop och k\u00e4nsligare instrument kommer att kunna studera dessa avl\u00e4gsna v\u00e4rldar. Vilka hemligheter kommer de att uppt\u00e4cka, med CHEOPS som v\u00e4gvisare?<\/p>\n<p><i>Intressant fakta: CHEOPS fotometer \u00e4r s\u00e5 k\u00e4nslig att den kan studera relativt sm\u00e5 exoplaneter <\/i>\u2013<i>\u00a0upp till Neptunus storlek! <\/i><\/p>\n<p><b>\u00a0<\/b><\/p>","protected":false},"excerpt":{"rendered":"<p>Have you ever looked up at the night sky and wondered if there are other planets out there, beyond our Solar System? Astronomers have discovered that there are! We call [&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\/2019\/03\/cheops_satellite7\/19318953-2-eng-GB\/Cheops_satellite.jpg","esa_banner_description":"The CHEOPS satellite being tested before launch. It is 1.5 metres long, and weighs 280kg. Copyright: ESA - S. Corvaja","esa_banner_credit":"ESA \u2013 S. Corvaja","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2019\/03\/Cheops_satellite7","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-261","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\/sv\/wp-json\/wp\/v2\/posts\/261","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=261"}],"version-history":[{"count":6,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/261\/revisions"}],"predecessor-version":[{"id":4378,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/261\/revisions\/4378"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=261"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=261"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=261"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=261"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=261"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=261"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=261"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}