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Fórum ExoSpace.cz • Zobrazit téma - HST pozoruje polární záře velkých planet
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HST pozoruje polární záře velkých planet

PříspěvekNapsal: 15. dub 2017, 21:31
od Petr Valach
Hubbleův dalekohled již mnoho let pozoruje polární záře na velkých planetách Sluneční soustavy. V tomto článku se podíváme na dvě – Uran a Jupiter. Proč právě tyto dvě planety? Jupiter je znám pro mohutnost a energii svých polárních září a v případě Uranu je význačné, že právě v posledních dnech Hubbleův dalekohled na něm zaznamenal silné polární záře.

Polární záře jsou způsobeny interakcí proudů nabitých částic (částice alfa, elektrony, protony) s planetou. Ty mají původ v různých zdrojích, může jím být sluneční vítr, ionosféra planet či vulkanická aktivita některého z měsíců. Tyto částice jsou zachyceny magnetickým polem a nasměrovány do horních vrstev atmosféry na pólech, kde interakce s plyny tvořícími atmosféru vytváří podivuhodné světelné představení.