{"id":5737,"date":"2017-03-20T11:36:33","date_gmt":"2017-03-20T18:36:33","guid":{"rendered":"https:\/\/vra-bc.com\/ro\/?p=5737"},"modified":"2017-03-23T21:37:19","modified_gmt":"2017-03-24T04:37:19","slug":"echinoctiul-de-primavara","status":"publish","type":"post","link":"https:\/\/vra-bc.com\/ro\/echinoctiul-de-primavara\/","title":{"rendered":"Echinoc\u021biul de prim\u0103var\u0103"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_full-6126cab7d8fab8d08143dd2dacdf673c\">\n.flex_column.av-av_one_full-6126cab7d8fab8d08143dd2dacdf673c{\n-webkit-border-radius:0px 0px 0px 0px;\n-moz-border-radius:0px 0px 0px 0px;\nborder-radius:0px 0px 0px 0px;\n}\n<\/style>\n<div class='flex_column av-av_one_full-6126cab7d8fab8d08143dd2dacdf673c av_one_full  avia-builder-el-0  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-6afa7ad67322e675d8f152f22a799ecf\">\n#top .av-special-heading.av-av_heading-6afa7ad67322e675d8f152f22a799ecf{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-av_heading-6afa7ad67322e675d8f152f22a799ecf .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-6afa7ad67322e675d8f152f22a799ecf .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-6afa7ad67322e675d8f152f22a799ecf av-special-heading-h2  avia-builder-el-1  el_before_av_hr  avia-builder-el-first '><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >Echinoc\u021biul de prim\u0103var\u0103<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<div  class='hr av-av_hr-34b6fe9e9f66a46e6d69cf6e4e15f130 hr-short  avia-builder-el-2  el_after_av_heading  el_before_av_image  hr-center'><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-fbbc88c58e7d669c7307a50d30e53aad\">\n.avia-image-container.av-av_image-fbbc88c58e7d669c7307a50d30e53aad img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-fbbc88c58e7d669c7307a50d30e53aad .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-fbbc88c58e7d669c7307a50d30e53aad av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-3  el_after_av_hr  el_before_av_hr '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img class='wp-image-5738 avia-img-lazy-loading-not-5738 avia_image ' src='https:\/\/vra-bc.com\/wp-content\/uploads\/2017\/03\/01-primavara.jpg' alt='' title='01-primavara'  height=\"600\" width=\"1200\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n<div  class='hr av-av_hr-34b6fe9e9f66a46e6d69cf6e4e15f130 hr-short  avia-builder-el-4  el_after_av_image  el_before_av_textblock  hr-center'><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-av_textblock-396ddf1f42196ca838231e61a4602801'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Dupa \u201eM\u0103r\u021bi\u0219or\u201d, \u201eBabe\u201d \u0219i \u201eMosi\u201d, dup\u0103 \"z\u0103pada mieilor\", c\u00e2nd calendaristic deja am p\u0103\u0219it \u00een anotimpul prim\u0103verii de\u0219i luna martie se dovede\u0219te a fi destul de capricioas\u0103, ne apropiem de momentul\u00a0<span class=\"captabel\">echinoc\u021biului de prim\u0103var\u0103<\/span>, ce marcheaz\u0103 \u00eenceputul\u00a0<span class=\"captabel\">prim\u0103verii astronomice<\/span>. El se produce \u00een jurul datei de\u00a0<span class=\"captabel\">20 martie\u00a0<\/span>c\u00e2nd longitudinea astronomic\u0103 a acestuia revine la valoarea de zero grade.<\/p>\n<p>Dup\u0103 cum este cunoscut, mi\u0219carea aparent\u0103 a Soarelui pe sfera cereasc\u0103, determinat\u0103 de mi\u0219carea real\u0103 a P\u0103m\u00e2ntului pe orbita sa, genereaz\u0103 pentru latitudinile noastre inegalitatea duratei zilelor \u0219i nop\u021bilor la diferite epoci ale anului, datorit\u0103 pozi\u021biei aproximativ fixe \u00een spatiu a axei de rota\u021bie a P\u0103m\u00e2ntului, precum \u0219i a \u00eenclin\u0103rii sale fa\u021b\u0103 de planul orbitei acestuia. Astfel, pe sfera cereasc\u0103, Soarele parcurge \u00een decurs de un an un cerc mare numit\u00a0<span class=\"captabel\">ecliptica\u00a0<\/span>(ce marcheaz\u0103 de fapt planul orbitei P\u0103m\u00e2ntului), care face cu ecuatorul ceresc un unghi de 23\u00b0 27' .<\/p>\n<p>La momentul echinoc\u021biului de prim\u0103v\u0103ra Soarele traverseaz\u0103 ecuatorul ceresc trec\u00e2nd din emisfera austral\u0103 a sferei cere\u0219ti \u00een cea boreal\u0103. C\u00e2nd Soarele se afl\u0103 \u00een acest punct, numit punct vernal, el descrie mi\u021bcarea diurn\u0103 \u00een lungul ecuatorului ceresc, fenomen ce determin\u0103, la data respectiv\u0103, egalitatea duratei zilelor cu cea a nop\u021bilor, indiferent de latitudine. La latitudinile \u021b\u0103rii noastre, pentru care putem considera valoarea medie de 45\u00b0, aceast\u0103 cifr\u0103 reprezint\u0103 \u021bi valoarea medie a \u00een\u0103l\u021bimii Soarelui deasupra orizontului la momentul amiezii. Totodat\u0103, la data respectiv\u0103, Soarele r\u0103sare \u00een punctul cardinal est \u0219i apune \u00een punctul cardinal vest.<\/p>\n<p>\u00cencep\u00e2nd de la aceasta dat\u0103, durata zilei (fa\u021b\u0103 de cea a nop\u021bii) va fi \u00een continu\u0103 cre\u0219tere, iar cea a nop\u021bii (fa\u021b\u0103 de cea a zilei) \u00een sc\u0103dere, p\u00e2n\u0103 la data de 21 iunie, c\u00e2nd va avea loc momentul solsti\u021biului de var\u0103.<\/p>\n<p>Evident, descrierea de mai sus este valabil\u0103 doar pentru latitudinile nordice ale Terrei. \u00cen emisfera sudic\u0103 a P\u0103m\u00e2ntului fenomenul trebuie interpretat invers, astfel ca \u00een regiunile respective acest moment marcheaz\u0103 \u00eenceputul toamnei astronomice. Totodat\u0103, \u00een regiunile polare, \u00een emisfera nordic\u0103 \u00eencepe lunga zi polar\u0103, iar in cea sudic\u0103 \u00eencepe noaptea polar\u0103, ce vor dura, fiecare, c\u00e2te 6 luni.<br \/>\n<small>Articol preluat de pe www.astro-urseanu.ro<\/small><\/p>\n<\/div><\/section><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Dupa \u201eM\u0103r\u021bi\u0219or\u201d, \u201eBabe\u201d \u0219i \u201eMosi\u201d, dup\u0103 &#8220;z\u0103pada mieilor&#8221;, c\u00e2nd calendaristic deja am p\u0103\u0219it \u00een anotimpul prim\u0103verii de\u0219i luna martie se dovede\u0219te a fi destul de capricioas\u0103, ne apropiem de momentul echinoc\u021biului de prim\u0103var\u0103, ce marcheaz\u0103 \u00eenceputul prim\u0103verii astronomice.<\/p>\n","protected":false},"author":310,"featured_media":5738,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[156],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Echinoc\u021biul de prim\u0103var\u0103 &raquo; 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