The celestial zenith of this terrestrial point.
这个地球点的天顶
The point on the celestial sphere that is directly above the observer.
天顶在观测者正上方的天体上的一点
The point on the orbit of a celestial body that is farthest from the sun.
远日点在天体运行轨道上距离太阳最远的点
The highest point in the sky reached by the sun or another celestial body a zenith.
天顶太阳或别的天体在天空中所达到的最高点天顶
A point on the celestial sphere directly below the observer, diametrically opposite the zenith.
天底天球上，在观测者垂直向下的一点，与天顶完全相对。
the point of greatest or least distance of the orbit of a celestial body from a center of attraction
远近点，天体轨道离吸引中心最远或最近距离的点
Astronomy A point on the celestial sphere directly below the observer diametrically opposite the zenith.
天球上，在观测者垂直向下的一点，与天顶完全相对。
the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected.
在观测者正上方的天球上的一点。
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