{"id":189,"date":"2021-12-02T12:47:40","date_gmt":"2021-12-02T11:47:40","guid":{"rendered":"https:\/\/kids.esa.int\/spacecraft_gaia_satellite_maps_over_a_billion_stars\/"},"modified":"2026-10-08T00:25:17","modified_gmt":"2026-10-07T22:25:17","slug":"spacecraft_gaia_satellite_maps_over_a_billion_stars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/spacecraft_gaia_satellite_maps_over_a_billion_stars\/","title":{"rendered":"Gaia-satellitten kortl\u00e6gger over en milliard stjerner!"},"content":{"rendered":"<div class=\"lede\">\n<p>En satellit fra Den Europ\u00e6iske Rumorganisation (ESA) ved navn Gaia har i 22 m\u00e5neder kortlagt himlen mere detaljeret end nogensinde f\u00f8r. Nu har astronomer brugt disse data til at udarbejde et nyt kort over rummet, der viser vores M\u00e6lkevej i fantastisk detalje!<\/p>\n<\/div>\n<p>Dette nye kort indeholder meget pr\u00e6cise m\u00e5linger af mere end en milliard stjerner, herunder deres positioner og bev\u00e6gelser i rummet. Gaia har ogs\u00e5 m\u00e5lt nogle stjerners farve, lysstyrke og overfladetemperatur. Det har endda indsamlet data om nogle stjerner uden for vores galakse. Der blev ogs\u00e5 registreret 14.000 asteroider i vores solsystem, hvilket giver mere information om disse m\u00e6rkelige klipper i rummet. Utroligt nok har Gaia registreret positionerne for en halv million fjerne kvasarer, som er lysst\u00e6rke galakser drevet af aktiviteten i de supermassive sorte huller i deres kerner!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"4300\" data-credit=\"ESA\/Gaia\/DPAC\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Gaia_s_sky_in_colour\" 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\/2018\/05\/gaia_s_sky_in_colour\/17897126-2-eng-GB\/Gaia_s_sky_in_colour.jpg\" alt=\"Gaia\u2019s sky in colour\"><figcaption>Gaias himmel i farver<\/figcaption><\/figure>\n<p>Gaia-missionen er helt klart meget vigtig, og derfor har omkring 450 forskere og softwareudviklere arbejdet p\u00e5 at omdanne satellitens data til et stjernekort. Astronomer over hele verden har nu adgang til alle disse oplysninger, og de er meget begejstrede! Selv en kort tids studier af kortet har v\u00e6ret nok til at forbedre vores forst\u00e5else af stjernernes alder i vores galakse og af, hvordan stjernerne bev\u00e6ger sig i rummet, hvilket er afg\u00f8rende for at unders\u00f8ge, hvordan stjerner dannes og \u00e6ndrer sig over tid.<\/p>\n<p>De nye data er ogs\u00e5 blevet brugt til at beregne banerne for 75 kugleformede stjernehobe og 12 dv\u00e6rggalakser, der kredser om vores M\u00e6lkevej. Dette vil hj\u00e6lpe os med at studere M\u00e6lkevejen og dens omgivelser, som den er nu, som den var i fortiden, og med at forudsige, hvordan den vil se ud i fremtiden. Hvordan p\u00e5virker tyngdekraften objekternes bev\u00e6gelse i rummet, og hvor stor indflydelse har den mystiske m\u00f8rke materie? Takket v\u00e6re Gaia har astronomerne f\u00e5et masser af nye ledetr\u00e5de.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"2560\" data-credit=\"ESA, CC BY-SA 3.0 IGO\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Cosmic_scales_covered_by_Gaia_s_second_data_release\" data-licence=\"CC BY-SA 3.0 IGO or 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\/2018\/05\/cosmic_scales_covered_by_gaia_s_second_data_release\/17874260-2-eng-GB\/Cosmic_scales_covered_by_Gaia_s_second_data_release.jpg\" alt=\"Cosmic scales covered by Gaia\u2019s second data release\"><figcaption>Kosmiske skalaer omfattet af Gaias anden dataudgivelse<\/figcaption><\/figure>\n<p>ESA\u2019s videnskabsdirekt\u00f8r, G\u00fcnther Hasinger, sagde: \u201cDe observationer, som Gaia har indsamlet, omdefinerer astronomiens grundlag.\u201d Det er en meget sp\u00e6ndende tid at interessere sig for rummet! Hvad vil Gaia-kortet hj\u00e6lpe os med at opdage n\u00e6ste gang?<\/p>\n<p><b>Sjovt faktum:<\/b> Nogle af stjernerne blev m\u00e5lt med samme pr\u00e6cision, som hvis en iagttager p\u00e5 Jorden kunne se en eurom\u00f8nt p\u00e5 M\u00e5nens overflade!<\/p>","protected":false},"excerpt":{"rendered":"<p>A European Space Agency satellite called Gaia has spent 22 months charting the sky in more detail than ever before. Now astronomers have used this data to make a new [&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\/2018\/05\/artist_s_impression_of_gaia\/18247105-2-eng-GB\/Artist_s_impression_of_Gaia.jpg","esa_banner_description":"Artist's impression of Gaia","esa_banner_credit":"ESA\u2013D. 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