{"id":3991,"date":"2026-08-02T16:02:08","date_gmt":"2026-08-02T16:02:08","guid":{"rendered":"https:\/\/astrohodonin.cz\/index.php\/2026\/08\/02\/ohniva-duha-nad-zapadni-virginii\/"},"modified":"2026-08-02T16:02:08","modified_gmt":"2026-08-02T16:02:08","slug":"ohniva-duha-nad-zapadni-virginii","status":"publish","type":"post","link":"https:\/\/astrohodonin.cz\/index.php\/2026\/08\/02\/ohniva-duha-nad-zapadni-virginii\/","title":{"rendered":"Ohniv\u00e1 duha nad Z\u00e1padn\u00ed Virgini\u00ed"},"content":{"rendered":"<p>Co se to s t\u00edm mrakem d\u011bje? Ledov\u00e9 krystalky ve vzd\u00e1len\u00e9m cirrusov\u00e9m mraku funguj\u00ed jako mal\u00e9 vzn\u00e1\u0161ej\u00edc\u00ed se hranoly. Oblouk kolem obzoru, neform\u00e1ln\u011b naz\u00fdvan\u00fd \u201eohniv\u00e1 duha\u201c kv\u016fli sv\u00e9mu vzhledu p\u0159ipom\u00ednaj\u00edc\u00edmu plameny, se objevuje rovnob\u011b\u017en\u011b s obzorem. Aby byl oblouk kolem obzoru viditeln\u00fd, mus\u00ed b\u00fdt Slunce nejm\u00e9n\u011b 58 stup\u0148\u016f nad obzorem a pod n\u00edm se mus\u00ed nach\u00e1zet cirrusov\u00e9 mraky \u2013  v tomto p\u0159\u00edpad\u011b cirrus fibratus.  \u010cetn\u00e9, ploch\u00e9, \u0161esti\u00faheln\u00edkov\u00e9 ledov\u00e9 krystalky, z nich\u017e se cirrusov\u00fd mrak skl\u00e1d\u00e1, mus\u00ed b\u00fdt uspo\u0159\u00e1d\u00e1ny vodorovn\u011b, aby spr\u00e1vn\u011b l\u00e1maly slune\u010dn\u00ed sv\u011btlo podobn\u00fdm zp\u016fsobem.  Proto je pozorov\u00e1n\u00ed oblouk\u016f kolem obzoru pon\u011bkud neobvykl\u00e9.  Zobrazen\u00e1 ohniv\u00e1 duha byla vyfotografov\u00e1na v roce 2021 pobl\u00ed\u017e hory North Fork Mountain ve Z\u00e1padn\u00ed Virginii v USA.    P\u0159ekvapen\u00ed na obloze: Jak\u00fd sn\u00edmek zve\u0159ejnil APOD v den va\u0161ich narozenin? (po roce 1995)<\/p>\n<p><!-- astropress --><\/p>\n<p>**Credit**: Christa Harbig<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Co se to s t\u00edm mrakem d\u011bje? Ledov\u00e9 krystalky ve vzd\u00e1len\u00e9m cirrusov\u00e9m mraku funguj\u00ed jako mal\u00e9 vzn\u00e1\u0161ej\u00edc\u00ed se hranoly. Oblouk kolem obzoru, neform\u00e1ln\u011b naz\u00fdvan\u00fd \u201eohniv\u00e1 duha\u201c kv\u016fli sv\u00e9mu vzhledu p\u0159ipom\u00ednaj\u00edc\u00edmu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3992,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nasa"],"_links":{"self":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/3991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/comments?post=3991"}],"version-history":[{"count":0,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/3991\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/media\/3992"}],"wp:attachment":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/media?parent=3991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/categories?post=3991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/tags?post=3991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}