天极距的英文

• celestial polar distance

• 天极:    celestial pole
• 距:    distance
• 天极:    [天文学] celestial pole◇天极仪 [光学] polar telescope
• 极距:    anode-cathode distance; anode-cathode separation; codeclination; distance between electrodes; electrode distance; interpolar gap; polar distance; polar pitch; polar plot; pole clearance; pole pitch; pole spacing; pole span; pole-pitch
• 北天极:    north celestial pole; north pole of the heavens