1.【宇,天】(行星或彗星运行轨道最接近太阳的)近日点;最高点,极点
1.the point in the orbit of a planet or other astronomical body at which it comes closest to the Sun
1.In all this Cuban business there is one man stands out on the horizon of my memory like Mars at perihelion .
在所有与古巴有关的故事中，有一个人令我无法忘怀，他就像近日点的火星一样耀眼。
2.Dust trails laid down at various perihelion returns during the 19th century seem to have been responsible for the last two main outbursts.
奠定了在不同的近日点回报在19世纪的灰尘足迹似乎已经在过去的两个主要的爆发负责。
3.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？
4.position of a planet as defined by its angular distance from its perihelion (as observed from the sun).
从太阳观察到的行星距近日点的角度偏差。
5.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。
6.Otherwise difficult to notice, the change in the Sun's apparent diameter between Perihelion and Aphelion is clear.
我们很难用肉眼看出近日点和远日点太阳视直径的变化，但在这张图上显而易见。
7.Slightly more solar energy is received when the Sun and Earth are closest (the perihelion) than when they are farthest apart (the aphelion).
太阳和地球的距离最近（近日点）时，所接收的太阳能要比距离最远（远日点）时接收的稍多一点。
8.But it's not that simple either, because the dates of the perihelion and aphelion are also shifting.
但这并不是简单的一件事情，因为近日点和远日点的日期都会变换。
9.The great comet of 1882, for example, almost grazed the sun, being only about 290, 000 miles away from the sun's surface at perihelion .
例如一八八二年出现的大彗星几乎擦过太阳，因为它的近日点距离太阳表面仅仅大约廿九万哩。
10.When Mars is at opposition and at perihelion--at the same time--it is very close to Earth.
当火星对冲又在近日点时，她离地球总是很近。