{"id":4162,"date":"2018-06-21T12:07:42","date_gmt":"2018-06-21T12:07:42","guid":{"rendered":"http:\/\/Dnes-21"},"modified":"2019-07-09T12:49:28","modified_gmt":"2019-07-09T11:49:28","slug":"astronomicke-leto","status":"publish","type":"post","link":"https:\/\/www.alohapatek.cz\/index.php\/2018\/06\/21\/astronomicke-leto\/","title":{"rendered":"Astronomick\u00e9 l\u00e9to"},"content":{"rendered":"\n

Dnes 21. \u010dervna 2018 za\u010dalo astronomick\u00e9 l\u00e9to. Ve 12:08 st\u0159edoevropsk\u00e9ho letn\u00edho \u010dasu dos\u00e1hlo Slunce na sv\u00e9 dr\u00e1ze nejsevern\u011bj\u0161\u00edho bodu, vstoupilo do znamen\u00ed Raka a severn\u00ed polokoule Zem\u011b se nejv\u00edce p\u0159iklon\u00ed ke Slunci. Proto nast\u00e1v\u00e1 i nejdel\u0161\u00ed den v roce.<\/p>\n\n\n\n

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\n \n <\/figcaption><\/figure><\/div>\n\n\n\n

Slunce u n\u00e1s bude sv\u00edtit 16 h 22 min nad obzorem a zapadne jen na 7 h 38 min kdy bude letn\u00ed noc. To je tak kr\u00e1tk\u00e1 doba, \u017ee po celou noc trv\u00e1 jen astronomick\u00fd soumrak a nenast\u00e1v\u00e1 skute\u010dn\u00e1 astronomick\u00e1 noc. <\/p>\n\n\n\n

Pro ty kdo nev\u00ed:<\/p>\n\n\n\n

OB\u010cANSK\u00dd SOUMRAK- je doba od z\u00e1padu Slunce po okam\u017eik, kdy se st\u0159ed Slunce dostane 6\u00b0 pod obzor. To sam\u00e9 plat\u00ed o rann\u00edm sv\u00edt\u00e1n\u00ed. Jednodu\u0161e v tomto obdob\u00ed je je\u0161t\u011b mo\u017en\u00e9 venku vykon\u00e1vat v\u011bt\u0161inu \u010dinnost\u00ed bez um\u011bl\u00e9ho osv\u011btlen\u00ed. <\/p>\n\n\n\n

NAUTICK\u00dd SOUMRAK- B\u011bhem nautick\u00e9ho soumraku jsou sv\u011bteln\u00e9 podm\u00ednky ji\u017e \u0161patn\u00e9. Rozezn\u00e1v\u00e1me pouze obrysy p\u0159edm\u011bt\u016f, na obloze je vid\u011bt v\u011bt\u0161ina jasn\u00fdch hv\u011bzd.<\/p>\n\n\n\n

ASTRONOMICK\u00dd SOUMRAK- Vrchn\u00ed vrstvy atmosf\u00e9ry je\u0161t\u011b st\u00e1le rozptyluj\u00ed do spodn\u00edch vrstev atmosf\u00e9ry slune\u010dn\u00ed z\u00e1\u0159en\u00ed, tak\u017ee obloha je m\u00edrn\u011b nasv\u00edcen\u00e1 a nejsou vid\u011bt nejslab\u0161\u00ed hv\u011bzdy.<\/p>\n\n\n\n

ASTRONOMICK\u00c1 NOC- St\u0159ed slune\u010dn\u00edho disku se nach\u00e1z\u00ed v\u00edce ne\u017e 18\u00b0 pod obzorem a horn\u00ed vrstvy atmosf\u00e9ry ji\u017e nejsou slune\u010dn\u00edmi paprsky v\u016fbec nasv\u00edceny. Na hv\u011bzdn\u00e9 obloze jsou vid\u011bt i ty nejslab\u0161\u00ed hv\u011bzdy.<\/p>\n\n\n\n

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\n \n <\/figcaption><\/figure><\/div>\n\n\n\n

\t Na severn\u00edm pol\u00e1rn\u00edm kruhu nezapadne ani o p\u016flnoci a bude se pomalu posouvat nad severn\u00edm obzorem.<\/p>\n\n\n\n

Od dne\u0161n\u00edho dne se bude zkracovat den, a\u017e do zimn\u00edho slunovratu, kter\u00fd nastane 21. prosince 23:23 hod<\/p>\n\n\n\n

Pr\u016fnik paprsku Slunce skrz z \u0161t\u011brbinu na slune\u010dn\u00edch hodin\u00e1ch v R\u016f\u017e\u010fce nastal ve 12:50 min co\u017e je tak\u00e9 pro na\u0161i polohu doba prav\u00e9ho poledne, je to tak\u00e9 z\u00e1rove\u0148 nejpozd\u011bj\u0161\u00ed \u010das, kdy je mo\u017en\u00e9 ho na 18 poledn\u00edku pozorovat.<\/p>\n\n\n\n

Je velmi zaj\u00edmav\u00e9 porovnat ten kus \u0161utru s „digit\u00e1kama“ na \u017elut\u00e9 lunet\u011b je graficky zobrazena doba slune\u010dn\u00edho svitu. Na jej\u00edm okraji je p\u0159echod do ob\u010dansk\u00e9ho a d\u00e1le do astronomick\u00e9ho soumraku. \u0160ipka na lunet\u011b ukazuje aktu\u00e1ln\u00ed pozici slunce. \u00dadaje nad a pod \u010dasem zobrazuj\u00ed v\u00fdchod a z\u00e1pad slunce pro aktu\u00e1ln\u00ed GPS pozici. <\/p>\n\n\n\n

P\u0158EJI V\u0160EM P\u0158\u00cdJEMN\u00c9 A ODPO\u010cINKOV\u00c9 L\u00c9TO.<\/p>\n","protected":false},"excerpt":{"rendered":"

Dnes 21.<\/p>\n","protected":false},"author":3,"featured_media":4165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[114,257],"class_list":["post-4162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pocasi","tag-pocasi","tag-slunovrat"],"_links":{"self":[{"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/posts\/4162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/comments?post=4162"}],"version-history":[{"count":2,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/posts\/4162\/revisions"}],"predecessor-version":[{"id":14439,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/posts\/4162\/revisions\/14439"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/media\/4165"}],"wp:attachment":[{"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/media?parent=4162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/categories?post=4162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alohapatek.cz\/index.php\/wp-json\/wp\/v2\/tags?post=4162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}