Nautička polarna noć

Nautička polarna noć događa se na mjestima gdje se geometrijsko središte Sunca ne diže  iznad 12 stupnjeva ispod horizonta najmanje 24 sata (nema nautičkog sumraka tijekom zimskog solsticija). Oko lokalnog podneva može se doživjeti samo astronomski sumrak. Događa se na širinama 12 stupnjeva sjeverno od Arktičkog kruga i 12 stupnjeva ispod Antarktičkog kruga, što ga ograničava na geografske širine sjeverno od 78,56 °N i južno od 78,56 °S.

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