Circle of perpetual occultation

at any given place, the boundary of the space around the depressed pole, within which the stars never rise.

See under Circle.

circle of perpetual occultation

[′sər·kəl əv pər′pech·ə·wəl ‚äk·əl′tā·shən] (astronomy) That circle of the celestial sphere, centered on the polar axis and having a polar distance from the depressed pole approximately equal to the latitude of the observer, within which celestial bodies do not rise.

随便看

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。