The point in the path of an orbiting celestial object or spacecraft at which it is closest to the primary. Also: The point in the path of a ray of…
| 单词 | θ572 |
| 释义 | the world > the universe > planet > primary planet > secondary planet, satellite > [noun] > position (2) periapsis1959 The point in the path of an orbiting celestial object or spacecraft at which it is closest to the primary. Also: The point in the path of a ray of… periapse1974 = periapsis, n. |
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