{"id":4061,"date":"2026-09-09T15:50:56","date_gmt":"2026-09-09T15:50:56","guid":{"rendered":"https:\/\/astrohodonin.cz\/index.php\/2026\/09\/09\/sledujte-jak-hvezda-xz-andromedae-blika\/"},"modified":"2026-09-09T15:50:56","modified_gmt":"2026-09-09T15:50:56","slug":"sledujte-jak-hvezda-xz-andromedae-blika","status":"publish","type":"post","link":"https:\/\/astrohodonin.cz\/index.php\/2026\/09\/09\/sledujte-jak-hvezda-xz-andromedae-blika\/","title":{"rendered":"Sledujte, jak hv\u011bzda XZ Andromedae blik\u00e1"},"content":{"rendered":"<div style=\"width: 640px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-4061-1\" width=\"640\" height=\"360\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/apod.nasa.gov\/apod\/image\/2609\/xz_and.mp4?_=1\" \/><a href=\"https:\/\/apod.nasa.gov\/apod\/image\/2609\/xz_and.mp4\">https:\/\/apod.nasa.gov\/apod\/image\/2609\/xz_and.mp4<\/a><\/video><\/div>\n<p>Mrk\u00e1 na n\u00e1s tato hv\u011bzda? \u00dast\u0159edn\u00edm objektem dne\u0161n\u00ed animace nen\u00ed jedna, ale hned dv\u011b hv\u011bzdy. XZ Andromedae, vyzna\u010den\u00e1 tu\u010dn\u00fdmi \u010darami, je z\u00e1krytov\u00e1 dvojhv\u011bzda typu Algol, jej\u00ed\u017e ob\u011b\u017en\u00e1 dr\u00e1ha je z pohledu Zem\u011b t\u00e9m\u011b\u0159 kolm\u00e1 k os\u011b soustavy. Spodn\u00ed sv\u011bteln\u00e1 k\u0159ivka ukazuje, jak se mno\u017estv\u00ed sv\u011btla z tohoto syst\u00e9mu stm\u00edv\u00e1 a zesiluje, kdy\u017e chladn\u011bj\u0161\u00ed hv\u011bzda zakr\u00fdv\u00e1 svou teplej\u0161\u00ed a jasn\u011bj\u0161\u00ed spole\u010dnici. Anal\u00fdza n\u011bkolika sv\u011bteln\u00fdch k\u0159ivek XZ Andromedae nazna\u010duje, \u017ee kolem syst\u00e9mu mohou ob\u00edhat dal\u0161\u00ed dv\u011b hv\u011bzdy. Tato konkr\u00e9tn\u00ed sv\u011bteln\u00e1 k\u0159ivka byla vytvo\u0159ena pomoc\u00ed programu Citizen Astronomy, co\u017e je open-source software pro diferenci\u00e1ln\u00ed fotometrii. Tento software m\u011b\u0159\u00ed rozd\u00edl v jasu mezi sledovanou hv\u011bzdou a srovn\u00e1vac\u00ed hv\u011bzdou a sleduje jej\u00ed chov\u00e1n\u00ed v pr\u016fb\u011bhu \u010dasu. Tato technika omezuje v\u011bt\u0161inu odchylek zp\u016fsoben\u00fdch p\u0159\u00edstrojem a zemskou atmosf\u00e9rou. Krom\u011b z\u00e1krytov\u00fdch dvojhv\u011bzd je tato anal\u00fdza u\u017eite\u010dn\u00e1 pro studium tranzituj\u00edc\u00edch exoplanet, akre\u010dn\u00edch \u010dern\u00fdch d\u011br, supernov a mnoha dal\u0161\u00edch \u010dasov\u011b prom\u011bnn\u00fdch astronomick\u00fdch jev\u016f. Astrofotografov\u00e9: vyzkou\u0161ejte si to na sv\u00fdch vlastn\u00edch datech!<\/p>\n<p><!-- astropress --><\/p>\n<p>**Credit**: NASA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/apod.nasa.gov\/apod\/image\/2609\/xz_and.mp4 Mrk\u00e1 na n\u00e1s tato hv\u011bzda? \u00dast\u0159edn\u00edm objektem dne\u0161n\u00ed animace nen\u00ed jedna, ale hned dv\u011b hv\u011bzdy. XZ Andromedae, vyzna\u010den\u00e1 tu\u010dn\u00fdmi \u010darami, je z\u00e1krytov\u00e1 dvojhv\u011bzda typu Algol, jej\u00ed\u017e ob\u011b\u017en\u00e1 dr\u00e1ha je [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4061","post","type-post","status-publish","format-standard","hentry","category-nasa"],"_links":{"self":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/4061","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=4061"}],"version-history":[{"count":1,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/4061\/revisions"}],"predecessor-version":[{"id":4062,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/posts\/4061\/revisions\/4062"}],"wp:attachment":[{"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/media?parent=4061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/categories?post=4061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astrohodonin.cz\/index.php\/wp-json\/wp\/v2\/tags?post=4061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}