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perihelion

美[ˌperɪ'hiːlɪən] 英[ˌperɪ'hiːlɪən]

n. 近日点；最高点

形容词：perihelial 名词复数：perihelia

近义词：aphelion，

n.(名词)

Noun

periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun

用作名词(n.)

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。
The anomalistic year is the time between successive transits of the Earth through the perihelion.近点年是地球连续两次通过近日点之间的时间。

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