N the point in its orbit when a planet or comet is at its greatest distance from the sun 远日点 → compare perihelion
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。
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。
The point in the orbit nearest the sun is called perihelion, while the point farthest is called aphelion.
在轨道上最接近太阳的点被称为近日点，而最远离太阳的点被称为远日点。
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