释义 |
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. |
See also: Circle, Occultation circle of perpetual occultation
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. |