单词 | line of apsides |
释义 | line of apsides [`līn ǝv `ap·sǝ´dēz] ASTRONOMY 1. The line connecting the two points of an orbit that are nearest and farthest from the center of attraction, as the perigee and apogee of the moon or the perihelion and aphelion of a planet. 2. The length of this line. |
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