Surrounding or found around either the North or South Pole, or visible from the poles throughout the year.
From Latin circum- (around) + polar (relating to the poles), combining ancient geographic terminology with modern astronomical usage from the 18th century onward.
Circumpolar stars like the Big Dipper never set below the horizon if you're in the Arctic—they literally spin around the North Star all night, which is why ancient navigators called them the 'never-setting' stars.
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