aphelion的翻译，读音
英/ æpˈhiːlɪən /
美/ æˈfilɪən /
释义：
n.远日点
词态
复数aphelia或aphelions反义词
perihelion
例句
A comet is at aphelion when it is farthest from the sun. 彗星离太阳最远时就是在它的远日点上。
He also figured out the planet goes faster when it's at perihelion, nearer the sun, than when it's at aphelion, its farthest distance. 他还计算出地球在近日点（即距离太阳最近的点）比在远日点（即距离太远最远的点）运行得更快。
The Q is - do you mean Pluto in its aphelion or perihelion ? 我的问题是，冥王星此时是在近地点还是远地点？ 。