| 单词 | parallactic angle |
| 释义 | parallactic angleparallactic angleparallactic angleparallactic angle(pa-ră-lak -tik) See astronomical triangle.Parallactic Anglein 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] |
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