| 单词 | synodic period |
| 释义 | synodic period The mean time taken by any object in the solar system to move between successive returns to the same position, relative to the sun as seen from the earth. Since a planet is best observed at opposition the synodic period of a planet, S, is easier to measure than its sidereal period, P. For inferior planets 1/S = 1/P - 1/E ; for superior planets 1/S = 1/E - 1/P , where E is the sidereal period of the earth |
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