circumpolar

形容词 circumpolar:

1. (of a celestial body) continually visible above the horizon during the entire 360 degrees of daily travel
2. located or found throughout a polar region

cir.cum.po.lar

adj.（形容词）
Located or found in one of the Polar Regions.
环极的，围绕极地的：位于或发现于一个极地区域中的
Astronomy Denoting a star that from a given observer`s latitude does not go below the horizon.
【天文学】 星体拱极的：表明一颗恒星位于不会低于地平线的一个给定观察者的纬度