When Earth's orbit is more elliptical, Earth is actually closer to the sun during part of the year.

当地球的轨道更接近椭圆时，地球实际上在一年的一部分时间里更接近太阳。

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Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.

在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。

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The Moon's orbit is elliptical, meaning it does not follow a circular but rather an oval path.

月球的轨道是椭圆的，因此，就意味着它不是以正圆的方式环绕地球公转，而是椭圆。

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Once the bullet is free of the atmosphere, which happens a few hundred kilometers up, it follows an elliptical orbit around Earth.

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The perigee of its elliptical orbit (the closest point it comes to Earth) has actually risen slightly, and is just above 200km.

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Its elliptical orbit actually crosses Neptune's path, yet the timing of the two planets' respective motions ensures that, like figures in a clockwork model, they never collide.

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