首页 > Term: apsis
apsis
One of the two points of an orbit, as of a planet or satellite, which are at the greatest and least distance from the central body, corresponding to the aphelion and perihelion of a planet, or to the apogee and perigee of the moon. The more distant is called the higher apsis; the other, the lower apsis; and the line joining them, the line of apsides.
- 词性: noun
- 行业/领域: 语言
- 类别 字典
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- spencer12
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(Germany)