noun
circumpolar star
Technical term in astronomy for a star that, from a given latitude, never sets below the horizon.
北極星は北半球で最も有名な周極星の一つです。
Polaris is one of the most famous circumpolar stars in the Northern Hemisphere.
Compound of 周 (shū, 'circumference') + 極 (kyoku, 'pole') + 星 (sei, 'star'), literally 'circum-pole star'.