Aphelion is the farthest orbital point from the sun and perihelion is the closest.

Aphelion（远日点）太阳远轨点，而Perihelion（日点）指。

The most distant point is known as aphelion and occurs around the 4th of July.

远点被称为“远日点”，大约出现在7月4日。

The tides from the Sun are far stronger on Mercury when it's at perihelion, the closest point in its orbit to the Sun, than when it's at aphelion, the farthest point in its orbit.

在日点，也就水星与太阳距处，它受到来自太阳引潮力比在远日点(水星轨太阳远点)时要强烈得多。

He also figured out the planet goes faster when it's at perihelion, nearer the sun, than when it's at aphelion, its furthest distance.

他还算出这个行星在距太阳日点比在距太阳远远日点时运动速度快。

Meanwhile, it's at its slowest in early July, at its furthest point from the Sun, or aphelion.

同时，它在 7 月初慢，在太阳远点，或远日点。

However, its motion around the Sun is faster at perihelion than aphelion.

然而，它在日点比在远日点时公转更快。

At aphelion, Mercury's spin is a bit faster than its orbital speed, so the Sun moves rapidly westward across the sky.

于在远日点时，水星自转速度会比它公转速度稍快一点，所以太阳会在天空中快速地向西移动。

The motion of Newton's comet at aphelion may be equally slight.

牛顿彗星在远日点运动可能同样轻微。

The corresponding change in gravitational force causes the Earth to move fastest in January, when it reaches its closest point to the Sun, the perihelion, and the slowest in July, when it reaches its farthest point, the aphelion.

引力相应变化导致地球在一月达到日点时运行快，而在七月到达远日点时则为缓慢。