Perihelion

[,perɪ'hiːlɪən] or [,pɛrɪ'hilɪən]

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

恩里克录入--From WordNet

(n.) Alt. of Perihelium

卡门录入

n. the point of the orbit of a planet or a comet at which it is nearest to the sun—opp. to Aphelion.—Also Perihē′lium.

格思里整理

And each year its summer point shifted a little further from perihelion round its path. 赫伯特·乔治·威尔斯. 世界史纲.

校对:维多利亚