{"id":30,"date":"2013-11-11T14:19:49","date_gmt":"2013-11-11T14:19:49","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=30"},"modified":"2026-03-19T10:39:06","modified_gmt":"2026-03-19T10:39:06","slug":"tosiasioita-elohopeaplaneetasta","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/fi\/facts-about-the-planet-mercury","title":{"rendered":"Faktoja Merkurius-planeetasta"},"content":{"rendered":"<ol>\n<li><strong>Koko:<\/strong>\u00a0Merkurius on aurinkokuntamme pienin planeetta; se on vain hieman suurempi kuin Maan kuu.<\/li>\n<li><strong>Aurinko:<\/strong>\u00a0Vaikka Merkurius on aurinkoa l\u00e4hin planeetta (noin 58 miljoonan kilometrin et\u00e4isyydell\u00e4), Venus on aurinkokuntamme kuumin planeetta.<\/li>\n<li><strong>P\u00e4iv\u00e4:<\/strong>\u00a0Yksi p\u00e4iv\u00e4 Merkuriuksella (eli aika, joka Merkuriuksella kuluu py\u00f6rimiseen akselinsa ymp\u00e4ri kerran) vastaa 59 p\u00e4iv\u00e4\u00e4 t\u00e4\u00e4ll\u00e4 maapallolla.<\/li>\n<li><strong>Vuosi:<\/strong>\u00a01 vuosi Merkuriuksella (eli aika, jonka Merkurius kiert\u00e4\u00e4 kerran auringon ymp\u00e4ri) vastaa 88 p\u00e4iv\u00e4\u00e4 t\u00e4\u00e4ll\u00e4 maapallolla.<\/li>\n<li><strong>Nopeus:<\/strong>\u00a0Merkuriuksen kiertonopeus on l\u00e4hes 50 km sekunnissa (Maan kiertonopeus on noin 30 km\/s), mik\u00e4 tekee siit\u00e4 aurinkokuntamme nopeimman planeetan.<\/li>\n<li><strong>Auringon ilmestyminen:<\/strong>\u00a0Jos seisot Merkuriuksen pinnalla, kun planeetta on l\u00e4himp\u00e4n\u00e4 aurinkoa, aurinko n\u00e4ytt\u00e4\u00e4 yli kolme kertaa suuremmalta kuin Maassa.<\/li>\n<li><strong>Pinta:<\/strong>\u00a0Merkuriuksen pinta koostuu kiviaavikoista, joissa on kraattereita - aivan kuten kuumme pinta.<\/li>\n<li><strong>L\u00e4mp\u00f6tilat:<\/strong>\u00a0Merkuriuksen l\u00e4mp\u00f6tila voi nousta 430 celsiusasteeseen p\u00e4iv\u00e4ll\u00e4 ja laskea -180 celsiusasteeseen y\u00f6ll\u00e4, joten on eritt\u00e4in ep\u00e4todenn\u00e4k\u00f6ist\u00e4, ett\u00e4 mik\u00e4\u00e4n el\u00e4m\u00e4nmuoto (sellaisena kuin me sen tunnemme) voisi selviyty\u00e4 t\u00e4\u00e4ll\u00e4.<\/li>\n<li><strong>Ominaisuudet:<\/strong>\u00a0Merkuriuksella ei ole kuita eik\u00e4 renkaita. Merkuriuksella ei my\u00f6sk\u00e4\u00e4n ole ilmakeh\u00e4\u00e4, vaan sill\u00e4 on ohut \"eksosf\u00e4\u00e4ri\", joka koostuu p\u00e4\u00e4asiassa hapesta, natriumista, vedyst\u00e4, heliumista ja kaliumista.<\/li>\n<li><strong>Nimi:<\/strong>\u00a0Merkuriuksen nimi on per\u00e4isin roomalaisesta mytologiasta, jossa Merkurius oli viestinn\u00e4n, nopeuden ja kaupank\u00e4ynnin jumala.<\/li>\n<\/ol>\n<figure id=\"attachment_7947\" aria-describedby=\"caption-attachment-7947\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7947 size-full\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2.jpg\" alt=\"Fakta: Merkurius on sek\u00e4 hyvin kuuma ett\u00e4 kylm\u00e4 planeetta.\" width=\"800\" height=\"800\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2-300x300.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2-150x150.jpg 150w, https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2-768x768.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/merkur-2-12x12.jpg 12w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-7947\" class=\"wp-caption-text\">Attribuutio: Tdadamemd - Wikipedia.org<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Merkuriuksen l\u00e4mp\u00f6tila voi nousta jopa 430 asteeseen ja laskea jopa -180 asteeseen.<\/strong><\/em><\/p>\n<h2>Lis\u00e4\u00e4 faktoja elohopeasta<\/h2>\n<ul>\n<li><strong>Magneettikentt\u00e4:<\/strong>\u00a0Elohopean magneettikent\u00e4n voimakkuus on vain 1% Maan magneettikent\u00e4n voimakkuudesta (pinnalla).<\/li>\n<li><strong>Akselin kallistus:<\/strong>\u00a0Merkuriuksen aksiaalinen kallistus on pienin kaikista aurinkokunnan planeetoista (0,01\u00b0 ekliptiseen n\u00e4hden).<\/li>\n<li><strong>N\u00e4kyvyys:<\/strong>\u00a0Koska Merkurius on niin l\u00e4hell\u00e4 Aurinkoa, sit\u00e4 on vaikea n\u00e4hd\u00e4 Maasta k\u00e4sin. K\u00e4yt\u00e4nn\u00f6ss\u00e4 se on mahdollista vain aamu- tai iltah\u00e4m\u00e4r\u00e4ss\u00e4. On kuitenkin olemassa ajanjakso, jota kutsutaan \"Merkuriuksen kauttakuluksi\" ja joka toistuu 13 kertaa vuosisadassa, jolloin Merkuriuksen voi n\u00e4hd\u00e4 kulkevan Auringon ohi. Merkuriuksen kauttakulku kest\u00e4\u00e4 useita p\u00e4ivi\u00e4 ja ajoittuu joskus 03. toukokuuta ja 14. marraskuuta v\u00e4lille. Lue lis\u00e4\u00e4\u00a0<a href=\"http:\/\/en.wikipedia.org\/wiki\/Transit_of_Mercury\" rel=\"noopener noreferrer\">Mercury Passage t\u00e4\u00e4ll\u00e4<\/a><\/li>\n<li><strong>Kierto:<\/strong>\u00a0Merkuriuksella on aurinkokunnan planeetoista eksentrisin rata. Merkurius on radallaan l\u00e4himmill\u00e4\u00e4n vain 47 miljoonan kilometrin p\u00e4\u00e4ss\u00e4 auringosta ja kaukaisimmillaan 70 miljoonan kilometrin p\u00e4\u00e4ss\u00e4 auringosta (l\u00e4hes 33%:n ero) - vertailun vuoksi Maa on \u00e4\u00e4rimm\u00e4isiss\u00e4 pisteiss\u00e4\u00e4n 146 ja 152 miljoonan kilometrin p\u00e4\u00e4ss\u00e4 auringosta (noin 4%:n ero).<\/li>\n<li><strong>Avaruusalus:<\/strong>\u00a0Vain kaksi avaruusalusta on k\u00e4ynyt Merkuriuksella:\n<ul>\n<li>Mariner 10, joka otti kuvia noin 45% Merkuriuksen pinnasta.<\/li>\n<li>MESSENGER, joka k\u00e4vi Merkuriuksella kolme kertaa vuosina 2008-2009 ja kiersi Merkuriusta vuonna 2011 (ja kiert\u00e4\u00e4 edelleen). L\u00e4hes koko pinta on nyt kuvattu<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<table border=\"1\">\n<tbody>\n<tr>\n<td class=\"sektion0\" colspan=\"2\">Mercuryn profiili<\/td>\n<\/tr>\n<tr>\n<td>Massa:<\/td>\n<td>3,302\u00d710<sup>23<\/sup>\u00a0kg (0,055 x Maa)<\/td>\n<\/tr>\n<tr>\n<td>Eksentrisyys:<\/td>\n<td>0,20563069<\/td>\n<\/tr>\n<tr>\n<td>Halkaisija p\u00e4iv\u00e4ntasaajalla:<\/td>\n<td>4,879 km<\/td>\n<\/tr>\n<tr>\n<td>Ymp\u00e4rysmitta p\u00e4iv\u00e4ntasaajalla:<\/td>\n<td>15,329 km<\/td>\n<\/tr>\n<tr>\n<td>Kiertonopeus:<\/td>\n<td>47,87 km\/s<\/td>\n<\/tr>\n<tr>\n<td>Aphelion:<\/td>\n<td>69 816 900 km<\/td>\n<\/tr>\n<tr>\n<td>Periheli<\/td>\n<td>46 001 200 km<\/td>\n<\/tr>\n<tr>\n<td>Keskim\u00e4\u00e4r\u00e4inen et\u00e4isyys auringosta:<\/td>\n<td>57,909,227 km<\/td>\n<\/tr>\n<tr>\n<td>Pintal\u00e4mp\u00f6tila:<\/td>\n<td>-183 - 427 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Koko: Se on vain hieman suurempi kuin Maan kuu Aurinko: Venus on aurinkokuntamme kuumin planeetta, vaikka Merkurius onkin l\u00e4himp\u00e4n\u00e4 Aurinkoa (noin 58 miljoonan kilometrin et\u00e4isyydell\u00e4): 1 p\u00e4iv\u00e4 Merkuriuksella (eli aika, joka Merkuriuksella kuluu ... <a title=\"Faktoja Merkurius-planeetasta\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/fi\/facts-about-the-planet-mercury\" aria-label=\"Lue lis\u00e4\u00e4 aiheesta Faktoja Merkurius-planeetasta\">Lue lis\u00e4\u00e4<\/a><\/p>","protected":false},"author":1,"featured_media":7965,"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-30","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>Mercury - Facts about the planet&#039;s size, moons, atmosphere, etc.<\/title>\n<meta name=\"description\" content=\"Fact: Mercury is the closest planet to the sun and the fastest planet in our solar system. 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