{"id":509,"date":"2004-11-16T10:36:00","date_gmt":"2004-11-16T09:36:00","guid":{"rendered":"https:\/\/kids.esa.int\/asteroids_the_minor_planets\/"},"modified":"2026-10-08T00:29:02","modified_gmt":"2026-10-07T22:29:02","slug":"asteroids_the_minor_planets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nl\/asteroids_the_minor_planets\/","title":{"rendered":"Planeto\u00efden - de kleine planeten"},"content":{"rendered":"<div class=\"lede\">\n<p>Astero\u00efden zijn kleine, rotsachtige hemellichamen die zijn overgebleven uit de vorming van de planeten 4,5 miljard jaar geleden. Ze worden vaak \u2018kleine planeten\u2019 genoemd.<\/p>\n<\/div>\n<p>Men gaat ervan uit dat er miljarden van deze rotsblokken bestaan. De meeste daarvan bevinden zich in een donutvormige \u2018hoofdgordel\u2019 tussen de banen van Mars en Jupiter. Aan de binnenrand van deze hoofdgordel doen astero\u00efden er ongeveer drie jaar over om een baan om de Zon te voltooien. Voor de astero\u00efden die zich dicht bij de buitenrand van de hoofdgordel bevinden, duurt dit twee keer zo lang.<\/p>\n<p>Het woord \u2018astero\u00efde\u2019 betekent \u2018sterachtig\u2019. Zij hebben deze naam gekregen omdat zij in de meeste telescopen slechts als lichtpuntjes te zien zijn. Aan het begin van de 20e eeuw noemden astronomen ze het \u2018ongedierte van de hemel\u2019. Ze waren in zulke grote aantallen zichtbaar dat ze foto\u2019s van verre sterrenstelsels en nevels verpestten.<\/p>\n<p>De grootste planeto\u00efde, Ceres, is als eerste ontdekt. De ontdekking werd gedaan door Giuseppi Piazzi uit Palermo, Sicili\u00eb, op 1 januari 1801.<\/p>\n<p>Een tweede kleine planeet, Pallas, werd in 1802 ontdekt door Wilhelm Olbers. Daarna volgden Juno (1804) en Vesta (1807). Sinds 1847 is er elk jaar wel minstens \u00e9\u00e9n nieuwe planeto\u00efde ontdekt.<\/p>\n<nav class=\"related\" aria-label=\"Gerelateerd\">\n<h2 class=\"related__heading\">Gerelateerd<\/h2>\n<div class=\"grid related__grid\">\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/asteroider_de_smaa_planeter\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Deens<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/planetoiden_-_de_kleine_planeten\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Nederlands<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/asteroiden_-_die_kleinplaneten\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Duits<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/asteroider_de_smaa_planetene\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Noors<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/asteroidy_czyli_planetoidy\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Pools<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/nl\/asteroider_smaaplaneterna\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Zweeds<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<\/div>\n<\/nav>","protected":false},"excerpt":{"rendered":"<p>Asteroids are small, rocky bodies that have been left over from the formation of the planets 4.5 billion years ago. They are often known as &#8216;minor planets&#8217;. There are thought [&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\/2001\/07\/asteroid_243_ida_and_its_newly_discovered_moon_dactyl2\/17863270-3-eng-GB\/Asteroid_243_Ida_and_its_newly_discovered_moon_Dactyl.jpg","esa_banner_description":"Asteroid 243 Ida and its newly discovered moon, Dactyl","esa_banner_credit":"NASA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/07\/Asteroid_243_Ida_and_its_newly_discovered_moon_Dactyl2","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-509","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/posts\/509","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/comments?post=509"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/posts\/509\/revisions"}],"predecessor-version":[{"id":1652,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/posts\/509\/revisions\/1652"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/media?parent=509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/categories?post=509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/tags?post=509"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/panel?post=509"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/language?post=509"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/age?post=509"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/duration?post=509"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/resource_type?post=509"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/audience?post=509"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nl\/wp-json\/wp\/v2\/wf_post_folders?post=509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}