他还指出了，地球在近日点的速度要比它在远日点快，近日点离太阳比较近，远日点是距离太阳最远的地方。
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.
他还指出了，地球在近日点的速度要比它在远日点快，近日点离太阳比较近，远日点是距离太阳最远的地方。
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.
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