| 单词 |
parallactic angle |
| 释义 |
parallactic angle
parallactic angleAngle formed by the optical axes of two instruments, for example, a telescope and its viewfinder seeing the same object. See also angle of convergence.parallactic angle
parallactic angle (pa-ră-lak -tik) See astronomical triangle.Parallactic Angle in astronomy, the angle at the celestial body in the parallactic triangle. For an observer within the sphere it is measured counterclockwise from the side connecting the body with the celestial pole. parallactic angle[¦par·ə¦lak·tik ′aŋ·gəl] (astronomy) position angle |
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