perihelia

常见例句

A comet is at perihelion when it is closest (=very close) to the sun.
彗星最接近太阳时，它就是在近日点。
A comet is at perihelion when it is closest to the sun.
彗星最接近太阳时，它就是在近日点。
How much does the direction of perihelion change each orbit?
近日点方向使每个轨道改变了多少？
The angular deviation,as observed from the sun,of a planet from its perihelion.
近点距离，近点角从太阳观察到的行星距近日点的角度偏差
When perigee and perihelion coincide tidal range is at its greatest.
当月球与地球到达它们的近地点和近日点的时间恰好重合时，就会引起最大的潮汐。
The angular deviation,as observed from the sun.of a planet from its perihelion.
近点距离，近点角从太阳观察到的行星距近日点的角度偏差