{"id":661,"date":"2008-07-04T09:36:00","date_gmt":"2008-07-04T07:36:00","guid":{"rendered":"https:\/\/kids.esa.int\/can_et_hear_the_sounds_of_earth\/"},"modified":"2026-10-08T00:30:51","modified_gmt":"2026-10-07T22:30:51","slug":"can_et_hear_the_sounds_of_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/can_et_hear_the_sounds_of_earth\/","title":{"rendered":"Kas tulnukad kuulevad Maa helisid?"},"content":{"rendered":"
\n

ESA nelja \u201cCluster\u201d-kosmoselaeva uuringud on n\u00e4idanud, et Maal ja teistel planeetidel on viis, kuidas \u00fclej\u00e4\u00e4nud galaktikale h\u00fc\u00fcda: \u201eMa olen siin!\u201d. Planeetidelt tulevad s\u00f5numid on aga kuuldavad ja arusaadavad vaid suurte raadioteleskoopide abil. V\u00e4lismaalane rass, kes tabab Maa looduslikke raadiosignaale, kuuleb seeria piiksuvaid ja vilistavaid helisid, mis meenutavad veidi \u201eStar Warsi\u201c robotit R2-D2.<\/p>\n<\/div>\n

Praegu ei ole isegi k\u00f5ige moodsamad teleskoobid piisavalt v\u00f5imsad, et avastada kaugete t\u00e4htede \u00fcmber Maa-suuruseid planeete. Sama probleemiga seisavad silmitsi ka tulnukate astronoomid \u2013 Maa otsimine oleks nagu n\u00f5ela otsimine heina hunnikust. Siiski annavad meie planeedi raadiopursed \u2013 mis on 10 000 korda tugevamad kui k\u00f5ige v\u00f5imsam s\u00f5jaline radarisignaal \u2013 selgelt teada Maa olemasolust.<\/p>\n

\"\"<\/figure>\n

Teadlased on juba 1970. aastatest saadik teadnud, et magnetv\u00e4ljaga planeedid (sealhulgas Maa, Jupiter ja Saturn) kiirgavad tugevaid raadiosignaale. Need kiirgused tekivad iga planeedi kohal k\u00f5rgel \u00f5hus samade p\u00e4ikesest p\u00e4rinevate osakeste toimel, mis p\u00f5hjustavad taevas allpool p\u00f5hjavalgust. Seni olid astronoomid eeldanud, et need raadiosignaalid levivad kosmosesse \u00fcha laieneva koonusena, nagu taskulambi valgus. T\u00e4nu Clusterile teame n\u00fc\u00fcd, et see ei ole t\u00f5si.<\/p>\n

Kui raadiosignaalide pursed tabasid kordam\u00f6\u00f6da iga kosmoselaeva, suutsid teadlased arvutada nende suuruse ja asukoha. Selgus, et signaalid liiguvad kosmoses kitsa kiirena. See muudab nende t\u00e4pse p\u00e4ritolu kindlaksm\u00e4\u00e4ramise palju lihtsamaks. Tulevikus v\u00f5ime avastada v\u00f5\u00f5raid maailmu, h\u00e4\u00e4lestades end nende piiksumiste ja vilistuste peale.<\/p>","protected":false},"excerpt":{"rendered":"

ESA\u2019s four Cluster spacecraft have found that Earth and other planets have a way of shouting \u201cI\u2019m here!\u201d to the rest of the Galaxy. However, the messages from the planets […]<\/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\/2002\/08\/the_cluster_constellation\/17863826-3-eng-GB\/The_Cluster_constellation.jpg","esa_banner_description":"The Cluster constellation","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/08\/The_Cluster_constellation","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-661","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\/et\/wp-json\/wp\/v2\/posts\/661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=661"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/661\/revisions"}],"predecessor-version":[{"id":4616,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/661\/revisions\/4616"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=661"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=661"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=661"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=661"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=661"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=661"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=661"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}