{"id":111,"date":"2013-11-13T14:07:26","date_gmt":"2013-11-13T14:07:26","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=111"},"modified":"2026-03-19T10:39:06","modified_gmt":"2026-03-19T10:39:06","slug":"neptunesin-loytoetsinta","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/fi\/neptunes-discovery-exploration","title":{"rendered":"Neptunuksen l\u00f6yt\u00e4minen ja tutkiminen"},"content":{"rendered":"<p>Neptunus oli ensimm\u00e4inen planeetta, joka l\u00f6ydettiin pikemminkin matemaattisten ennusteiden kuin havaintojen avulla. Kun Uranus ei lopulta liikkunut odotetulla tavalla, Urbain Joseph Le Verrier (ranskalainen matemaatikko) ja John Couch Adams (englantilainen matemaatikko ja t\u00e4htitieteilij\u00e4) ennustivat toisistaan riippumatta, ett\u00e4 poikkeama johtui toisen planeetan olemassaolosta.<\/p>\n<p>Adams l\u00e4hetti havaintonsa t\u00e4htitieteilij\u00e4 George B. Airylle Englantiin. Airy Englannissa, joka ei l\u00f6yt\u00e4nyt (eik\u00e4 ehk\u00e4 etsinytk\u00e4\u00e4n) planeettaa. T\u00e4m\u00e4n seurauksena Adams ei koskaan julkaissut l\u00f6yt\u00f6j\u00e4\u00e4n.<\/p>\n<p>Le Verrier otti yhteytt\u00e4 useisiin ranskalaisiin t\u00e4htitieteilij\u00f6ihin, mutta he kaikki hylk\u00e4siv\u00e4t h\u00e4nen l\u00f6yt\u00f6ns\u00e4. Niinp\u00e4 h\u00e4n l\u00e4hetti ennustuksensa saksalaiselle t\u00e4htitieteilij\u00e4lle Johann Gottfried Gallelle, joka l\u00f6ysi Neptunuksen ensimm\u00e4isen\u00e4 etsint\u00e4y\u00f6n\u00e4 23. syyskuuta 1846 (virallinen l\u00f6yt\u00f6p\u00e4iv\u00e4 on 24. syyskuuta 1846, koska Neptunus l\u00f6ydettiin 23. ja 24. syyskuuta 1846 v\u00e4lisen\u00e4 y\u00f6n\u00e4). Vain 17 p\u00e4iv\u00e4\u00e4 my\u00f6hemmin l\u00f6ydettiin Neptunuksen suurin kuu, Triton.<\/p>\n<figure id=\"attachment_7983\" aria-describedby=\"caption-attachment-7983\" style=\"width: 1190px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7983\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2.jpg\" alt=\"Fakta: Neptunuksen l\u00f6ysi kolme miest\u00e4 - Neptunuksen tutkimus on kuitenkin edelleen v\u00e4h\u00e4ist\u00e4.\" width=\"1200\" height=\"412\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2.jpg 1200w, https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2-300x103.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2-1024x352.jpg 1024w, https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2-768x264.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/neptun-udforskning-2-18x6.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-7983\" class=\"wp-caption-text\">Attribuutio: Magnus Manske + GDK + Jilibi - Wikipedia.org: Magnus Manske + GDK + Jilibi - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Urbain Joseph Le Verrier (ylh\u00e4\u00e4ll\u00e4), John Couch Adams (keskell\u00e4) ja Johann Gottfried Galle (alhaalla) ovat nyky\u00e4\u00e4n Neptunuksen l\u00f6yt\u00e4ji\u00e4.<\/strong><\/em><\/p>\n<h2>Nime\u00e4minen<\/h2>\n<p>Vaikka Galle oli Neptunuksen virallinen \"l\u00f6yt\u00e4j\u00e4\", h\u00e4n halusi, ett\u00e4 planeetta nimet\u00e4\u00e4n Le Verrierin mukaan, joka oli ennustanut tai laskenut sen olemassaolon. T\u00e4m\u00e4 ei kuitenkaan ollut tuolloin hyv\u00e4ksytt\u00e4v\u00e4\u00e4 kansainv\u00e4lisiss\u00e4 t\u00e4htitieteen piireiss\u00e4, ja planeetta nimettiin sen sijaan roomalaisen merenjumala Neptunuksen mukaan. Nyky\u00e4\u00e4n kaikki kolme Neptunuksen l\u00f6yt\u00e4j\u00e4\u00e4 (Le Verrier, Adams ja Galle) saavat tunnustusta Neptunuksen l\u00f6yt\u00e4misest\u00e4.<\/p>\n<h2>Aiemmat havainnot Neptunuksesta<\/h2>\n<p>Galileo oli ensimm\u00e4inen Neptunuksen havainnut henkil\u00f6 vuonna 1612, mutta h\u00e4n uskoi planeetan olevan t\u00e4hti ja kirjasi sen sellaisena - siksi Galileon havaintoa Neptunuksesta ei voida luonnehtia planeetan varsinaiseksi \"l\u00f6yd\u00f6ksi\".<\/p>\n<p>Muita Neptunuksen varhaisia havaitsijoita olivat muun muassa J\u00e9r\u00f4me Lalande vuonna 1795 ja John Herschel vuonna 1830, mutta Galileon tavoin kumpikaan ei luonnehtinut Neptunusta planeetaksi. N\u00e4m\u00e4 varhaiset havainnot ovat kuitenkin olleet t\u00e4rkeit\u00e4 Neptunuksen radan my\u00f6hemm\u00e4n tarkan kartoituksen kannalta.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-7984 size-full\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/galileo-neptun-2.jpg\" alt=\"Fakta: Galileo havaitsi ensimm\u00e4isen\u00e4 Neptunuksen.\" width=\"800\" height=\"1016\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/galileo-neptun-2.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/galileo-neptun-2-236x300.jpg 236w, https:\/\/www.123fakta.com\/wp-content\/uploads\/galileo-neptun-2-768x975.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/galileo-neptun-2-9x12.jpg 9w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p style=\"text-align: center;\"><em><strong>Fakta: Galileo oli ensimm\u00e4inen t\u00e4htitieteilij\u00e4, joka havaitsi Neptunuksen vuonna 1642, mutta koska h\u00e4n uskoi planeetan olevan t\u00e4hti, \"l\u00f6yt\u00f6\u00e4\" ei voida katsoa h\u00e4nen ansiokseen.<\/strong><\/em><\/p>\n<h2>T\u00e4rkeimm\u00e4t p\u00e4iv\u00e4m\u00e4\u00e4r\u00e4t Neptunuksen l\u00f6yt\u00e4misess\u00e4<\/h2>\n<p><strong>1846:<\/strong>\u00a0Matemaatikot ja t\u00e4htitieteilij\u00e4t ennustavat ja l\u00f6yt\u00e4v\u00e4t Neptunuksen matemaattisten laskelmien avulla, mik\u00e4 lis\u00e4\u00e4 aurinkokuntamme tunnettujen planeettojen m\u00e4\u00e4r\u00e4n kahdeksaan. Neptunuksen suurin kuu, Triton, l\u00f6ydet\u00e4\u00e4n samana vuonna.<\/p>\n<p><strong>1984:<\/strong>\u00a0T\u00e4htitieteilij\u00e4t l\u00f6yt\u00e4v\u00e4t todisteita rengasj\u00e4rjestelm\u00e4n olemassaolosta Neptunuksen ymp\u00e4rill\u00e4.<\/p>\n<p><strong>1989:<\/strong>\u00a0Voyager 2 on ensimm\u00e4inen ja ainoa avaruusalus, joka on koskaan k\u00e4ynyt Neptunuksessa. Voyager 2 ohittaa planeetan pohjoisnavan noin 4 800 kilometrin korkeudella.<\/p>\n<p><strong>1998:<\/strong>\u00a0Tutkijat k\u00e4ytt\u00e4v\u00e4t Maan ja avaruuden teleskooppeja kuvatakseen Neptunuksen renkaita ja kaaria ensimm\u00e4ist\u00e4 kertaa.<\/p>\n<p><strong>2003:<\/strong>\u00a0T\u00e4htitieteilij\u00e4t l\u00f6yt\u00e4v\u00e4t parannettujen havainnointitekniikoiden avulla 5 uutta kuuta Neptunusta.<\/p>\n<p><strong>2005:<\/strong>\u00a0Tutkijat k\u00e4ytt\u00e4v\u00e4t Keck-observatoriota kuvatakseen Neptunuksen uloimpia renkaita ja havaitsevat, ett\u00e4 osa kaarista on hajoamassa.<\/p>\n<p><strong>2011:<\/strong>\u00a0Neptunus kiert\u00e4\u00e4 ensimm\u00e4ist\u00e4 kertaa 165 vuotta Auringon ymp\u00e4ri sen j\u00e4lkeen, kun se l\u00f6ydettiin vuonna 1846.<\/p>\n<p><strong>2013:<\/strong>\u00a0Tutkija, joka tutkii Neptunuksen rengaskaaria Hubble-teleskoopilla, l\u00f6yt\u00e4\u00e4 aiemmin tuntemattoman 14. kuun, joka kiert\u00e4\u00e4 Neptunusta (kuu oli aiemmin nimetty S\/2004 N 1).<\/p>\n<h2>Tutkimus<\/h2>\n<p>Ainoa avaruusalus, joka on koskaan k\u00e4ynyt ja tutkinut Neptunusta, on Voyager 2, joka k\u00e4vi siell\u00e4 vuonna 1989. Sittemmin teleskooppien yleinen kehittyminen on auttanut l\u00f6yt\u00e4m\u00e4\u00e4n lis\u00e4\u00e4 kuita, mit\u00e4 voidaan my\u00f6s osittain pit\u00e4\u00e4 er\u00e4\u00e4nlaisena planeetan tutkimisena - mutta ainoat suunnitelmat k\u00e4yd\u00e4 Neptunuksessa uudelleen ovat NASA:n \"Neptune Orbiter\" -missio, joka tiett\u00e4v\u00e4sti k\u00e4ynnistet\u00e4\u00e4n vuonna 2016 ja saapuu sinne 14 vuotta my\u00f6hemmin vuonna 2030. Ajatuksena on, ett\u00e4 Neptune Orbiter kiert\u00e4\u00e4 Neptunusta ja tutkii sen s\u00e4\u00e4t\u00e4, magnetosf\u00e4\u00e4ri\u00e4, rengasj\u00e4rjestelm\u00e4\u00e4 ja kuita.<\/p>","protected":false},"excerpt":{"rendered":"<p>Neptunus oli ensimm\u00e4inen planeetta, joka l\u00f6ydettiin pikemminkin matemaattisten ennusteiden kuin havaintojen avulla. Kun Uranus ei lopulta liikkunut odotetulla tavalla, Urbain Joseph Le Verrier (ranskalainen matemaatikko) ja John Couch Adams (englantilainen matemaatikko ja t\u00e4htitieteilij\u00e4) ennustivat toisistaan riippumatta, ett\u00e4 poikkeama johtui toisen planeetan olemassaolosta. Adams l\u00e4hetti havaintonsa ... <a title=\"Neptunuksen l\u00f6yt\u00e4minen ja tutkiminen\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/fi\/neptunes-discovery-exploration\" aria-label=\"Lue lis\u00e4\u00e4 aiheesta Neptunuksen l\u00f6yt\u00e4minen ja tutkiminen\">Lue lis\u00e4\u00e4<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[69],"tags":[120],"class_list":["post-111","post","type-post","status-publish","format-standard","hentry","category-the-universe","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Neptuns opdagelse - S\u00e5dan blev planeten opdaget<\/title>\n<meta name=\"description\" content=\"Neptune was discovered in 1846 by calculation and observation. 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