| 单词 | position angle |
| 释义 | position anglenoun : an angle on the celestial sphere denoting the orientation of one object or celestial body with respect to another (as the orientation of the line joining the components of a double star usually measured from north through east up to 360 degrees, or the orientation of the axis of the sun, moon, planet, satellite, or star with respect to the north direction in the sky) |
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