Heimskautanótt

Tímabil þar sem sólin kemur ekki upp í heilan sólarhring eða 24 tíma (stöðugt myrkur) eru kallaðar heimskautanætur. Heimskautanótt er hægt að upplifa fyrir ofan breiddagráðu heimskautsbaugsins (66.5629° eða 66°33’46.6’’ N) og fyrir neðan suðurheimskautsbaugsins (66.5629°S eða 66°33’46.6’’S).

Vegna ljósaskiptanna skilgreinum við ólíkar heimskautanætur miðað við hvernig ljósaskipti eiga sér stað.

 

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