{"id":144,"date":"2013-11-15T08:23:37","date_gmt":"2013-11-15T08:23:37","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=144"},"modified":"2026-03-24T16:25:26","modified_gmt":"2026-03-24T16:25:26","slug":"tosiasioita-planeetasta-pluto","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/fi\/facts-about-the-planet-pluto","title":{"rendered":"Faktoja Pluto-planeetasta"},"content":{"rendered":"<ol>\n<li><strong>L\u00f6yt\u00f6:<\/strong>\u00a0Clyde Tombaugh l\u00f6ysi Pluton vuonna 1930. Vuoteen 1905 menness\u00e4 Percival Lowell oli kuitenkin jo saanut tiet\u00e4\u00e4 toisen planeetan olemassaolosta Neptunuksen ja Uranuksen l\u00e4heisyydess\u00e4 niiden kiertoratojen poikkeavuuksien perusteella. Tombaugh ja Lowell olivat molemmat amerikkalaisia t\u00e4htitieteilij\u00f6it\u00e4.<\/li>\n<li><strong>K\u00e4\u00e4pi\u00f6planeetta:<\/strong>\u00a0Plutoa pidettiin pitk\u00e4\u00e4n aurinkokuntamme yhdeks\u00e4nten\u00e4 planeettana. Elokuun 24. p\u00e4iv\u00e4st\u00e4 2006 l\u00e4htien Pluto on kuitenkin luokiteltu k\u00e4\u00e4pi\u00f6planeetaksi. Luokituksen muuttaminen tapahtui, kun Kansainv\u00e4linen t\u00e4htitieteellinen liitto hyv\u00e4ksyi m\u00e4\u00e4ritelm\u00e4n siit\u00e4, mit\u00e4 planeetta on.<\/li>\n<li><strong>P\u00e4iv\u00e4:<\/strong>\u00a0Yksi p\u00e4iv\u00e4 Plutolla (aika, joka Plutolta kuluu kerran itsens\u00e4 ymp\u00e4ri kiert\u00e4miseen) vastaa 6 p\u00e4iv\u00e4\u00e4 ja 9 tuntia t\u00e4\u00e4ll\u00e4 maapallolla.<\/li>\n<li><strong>Vuosi:<\/strong>\u00a01 vuosi Plutolla (aika, joka Plutolta kuluu auringon kiert\u00e4miseen) vastaa 248 vuotta t\u00e4\u00e4ll\u00e4 maapallolla.<\/li>\n<li><strong>Pinta:<\/strong>\u00a0Koska Maan ja Pluton v\u00e4linen et\u00e4isyys on pitk\u00e4, Pluton pinnasta ei tiedet\u00e4 paljoakaan. Tiedet\u00e4\u00e4n kuitenkin, ett\u00e4 l\u00e4mp\u00f6tila on -223-233 astetta.<\/li>\n<li><strong>Avaruusalus:<\/strong>\u00a0Maan avaruusalukset eiv\u00e4t ole koskaan k\u00e4yneet Plutolla. Vuonna 2006 kuitenkin laukaistiin New Horizons -avaruusalus, jonka on m\u00e4\u00e4r\u00e4 saapua sinne vuonna 2015.<\/li>\n<li><strong>Koko:<\/strong>\u00a0Pluto on pienempi kuin Maan kuu (halkaisija on noin 2390 km, mik\u00e4 on noin 2\/3 Kuun halkaisijasta).<\/li>\n<li><strong>Painovoima:<\/strong>\u00a0Pluton painovoima on paljon heikompi kuin Maan (noin 6% Maan painovoimasta).<\/li>\n<li><strong>Kierto:<\/strong>\u00a0Pluto py\u00f6rii Uranuksen ja Venuksen tavoin takaperin (retrogradinen kierto), id\u00e4st\u00e4 l\u00e4nteen. K\u00e4yt\u00e4nn\u00f6ss\u00e4 t\u00e4m\u00e4 tarkoittaa, ett\u00e4 aurinko nousee l\u00e4nness\u00e4 ja laskee id\u00e4ss\u00e4.<\/li>\n<li><strong>Piirisarja:<\/strong>\u00a0Pluton rata on hyvin elliptinen; kun Pluto on l\u00e4hell\u00e4 aurinkoa, j\u00e4\u00e4 kuivuu ja muodostuu ohut, v\u00e4liaikainen ilmakeh\u00e4. Kun Pluto on kauempana auringosta, l\u00e4mp\u00f6tila laskee. T\u00e4ll\u00f6in ilmakeh\u00e4n ajatellaan j\u00e4\u00e4tyv\u00e4n - t\u00e4m\u00e4 ei kuitenkaan ole tosiasia.<\/li>\n<\/ol>\n<figure id=\"attachment_7916\" aria-describedby=\"caption-attachment-7916\" style=\"width: 990px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7916\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/pluto-fakta-2.jpg\" alt=\"Fakta: Plutoa ei en\u00e4\u00e4 pidet\u00e4 planeettana.\" width=\"1000\" height=\"807\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/pluto-fakta-2.jpg 1000w, https:\/\/www.123fakta.com\/wp-content\/uploads\/pluto-fakta-2-300x242.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/pluto-fakta-2-768x620.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/pluto-fakta-2-15x12.jpg 15w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-7916\" class=\"wp-caption-text\">Attribuutio: C m handler - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Pluto luokiteltiin planeetasta k\u00e4\u00e4pi\u00f6planeetaksi vuonna 2006.<\/strong><\/em><\/p>\n<h2>Lis\u00e4\u00e4 faktoja Plutosta<\/h2>\n<ul>\n<li><strong>Kuut:<\/strong>\u00a0Plutolla on 5 kuuta: Charon, Nix, Hydra, Kerberos ja Styx.\u00a0<a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-plutos-maner\">Lue lis\u00e4\u00e4 Pluton kuista t\u00e4\u00e4lt\u00e4.<\/a><\/li>\n<li><strong>Aurinko:<\/strong>\u00a0Pluton et\u00e4isyys auringosta on keskim\u00e4\u00e4rin 5,9 biljoonaa kilometri\u00e4. Pluton eksentrinen rata tarkoittaa kuitenkin sit\u00e4, ett\u00e4 Pluton l\u00e4hin et\u00e4isyys Auringosta on 4,4 biljoonaa km ja kaukaisin 7,3 biljoonaa km.<\/li>\n<li><strong>Nimi:<\/strong>\u00a0Nimell\u00e4 Pluto on erityinen tarina: nimi-idea tuli 11-vuotiaalta Venetia Burneylta Oxfordista, Yhdistyneest\u00e4 kuningaskunnasta. Vuonna 1930 h\u00e4n ehdotti isois\u00e4lleen, ett\u00e4 vastik\u00e4\u00e4n l\u00f6ydetty planeetta pit\u00e4isi nimet\u00e4 roomalaisen manalan jumalan mukaan. Isois\u00e4 esitti nimen Lowellin observatoriolle, ja se valittiin. On kuitenkin syyt\u00e4 mainita, ett\u00e4 nimi Pluto valittiin my\u00f6s siksi, ett\u00e4 se alkaa kirjaimilla \"pl\", jotka ovat Percival Lowellin nimikirjaimet, ja n\u00e4in ollen se on pieni kunnianosoitus Lowellille. Teknisesti Pluton nimi on nyt 134340, koska se luokiteltiin uudelleen k\u00e4\u00e4pi\u00f6planeetaksi vuonna 2006.<\/li>\n<li><strong>Plutoidit:<\/strong>\u00a0Kun Pluto kuitenkin luokiteltiin 24. elokuuta 2006 planeetasta k\u00e4\u00e4pi\u00f6planeetaksi, Kansainv\u00e4linen T\u00e4htitieteellinen liitto tunnusti Pluton erityisaseman aurinkokunnassamme ja p\u00e4\u00e4tti ottaa k\u00e4ytt\u00f6\u00f6n kollektiivisen termin \"plutoidit\" kaikille Neptunusta kauempana oleville k\u00e4\u00e4pi\u00f6planeetoille.<\/li>\n<li><strong>Kuiperin vy\u00f6:<\/strong>\u00a0Pluto on osa niin sanottua Kuiperin vy\u00f6hykett\u00e4, joka on kokoelma Neptunusta kiert\u00e4vi\u00e4 asteroideja, k\u00e4\u00e4pi\u00f6planeettoja ja komeettoja, jotka kaikki muodostuivat aurinkokuntamme historian alkuvaiheessa. Toivotaan, ett\u00e4 Plutoon suuntautuva tutkimusmatka (New Horizon), joka vierailee my\u00f6s Kuiperin vy\u00f6hykkeell\u00e4, auttaa meit\u00e4 ymm\u00e4rt\u00e4m\u00e4\u00e4n paremmin aurinkokuntamme alkuper\u00e4\u00e4. Pluto on Kuiperin vy\u00f6hykkeen suurin tunnettu k\u00e4\u00e4pi\u00f6planeetta.<\/li>\n<\/ul>\n<table border=\"1\">\n<tbody>\n<tr>\n<td class=\"sektion0\" colspan=\"2\">Pluton profiili<\/td>\n<\/tr>\n<tr>\n<td>Massa:<\/td>\n<td>1,250\u00d710<sup>22<\/sup>\u00a0kg (0,00218 x Maa)<\/td>\n<\/tr>\n<tr>\n<td>Eksentrisyys:<\/td>\n<td>0,2488273<\/td>\n<\/tr>\n<tr>\n<td>Halkaisija p\u00e4iv\u00e4ntasaajalla:<\/td>\n<td>2 390 km<\/td>\n<\/tr>\n<tr>\n<td>Ymp\u00e4rysmitta p\u00e4iv\u00e4ntasaajalla:<\/td>\n<td>7 231,9 km<\/td>\n<\/tr>\n<tr>\n<td>Kiertonopeus:<\/td>\n<td>4,7 km\/s<\/td>\n<\/tr>\n<tr>\n<td>Aphelion:<\/td>\n<td>7 376 124 302 km<\/td>\n<\/tr>\n<tr>\n<td>Periheli<\/td>\n<td>4,436,756,954 km<\/td>\n<\/tr>\n<tr>\n<td>Keskim\u00e4\u00e4r\u00e4inen et\u00e4isyys auringosta:<\/td>\n<td>5,906,440,628 km<\/td>\n<\/tr>\n<tr>\n<td>Pintal\u00e4mp\u00f6tila:<\/td>\n<td>-223-233 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>L\u00f6yt\u00f6: Clyde Tombaugh l\u00f6ysi Pluton vuonna 1930. Vuoteen 1905 menness\u00e4 Percival Lowell oli kuitenkin jo saanut tiet\u00e4\u00e4 toisen planeetan olemassaolosta Neptunuksen ja Uranuksen l\u00e4heisyydess\u00e4 niiden kiertoratojen poikkeavuuksien perusteella. Tombaugh ja Lowell olivat molemmat amerikkalaisia t\u00e4htitieteilij\u00f6it\u00e4 K\u00e4\u00e4pi\u00f6planeetta: Plutoa pidettiin pitk\u00e4\u00e4n aurinkokuntamme yhdeks\u00e4nten\u00e4 planeettana. Kuitenkin ... <a title=\"Faktoja Pluto-planeetasta\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/fi\/facts-about-the-planet-pluto\" aria-label=\"Lue lis\u00e4\u00e4 aiheesta Faktoja Pluto-planeetasta\">Lue lis\u00e4\u00e4<\/a><\/p>","protected":false},"author":1,"featured_media":7915,"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-144","post","type-post","status-publish","format-standard","has-post-thumbnail","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>Pluto - Facts about the planet&#039;s atmosphere, orbital period, etc.<\/title>\n<meta name=\"description\" content=\"Fact: Pluto was the 9th planet in the solar system until 2006 - today it is considered a dwarf planet. 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