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公转轨道

公转轨道

公转轨道

公转轨道

1

Perhaps when this planet is at the far end of its path around the Sun , it reaches the inner edge of the Oort cloud .

当这颗行星运行到其公转轨道的远日点时，刚好就到达奥尔特彗星云的内缘。

2

The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun.

地球的自转轴与黄道面呈一定角度。黄道面是地球公转轨道所在的一个假想平面。

3

The planets do not travel about the Sun in circles , but in slightly lopsided , or egg-shaped, orbits called ellipses .

行星的绕日公转轨道并不是圆形，而是有些不对称、像蛋型的椭圆形轨道。

4

As a result, Uranus seems to be rolling on the orbital plane.

换句话说，天王星就好像是在公转轨道上滚动著。

6

And what a beast it is: as wide as Earth 's orbit around the sun and 4 . 3 million times more massive than our home star.

简直是个巨兽啊！宽度相当于地球公转轨道的直径，质量比我们的太阳还大 430万倍。

7

"That comes about because the Earth's orbit is not a true circle . We have a slightly elliptical orbit, " she said.

那是因为地球的公转轨道并不是一个正圆形，而是一个图圆形。

8

This star also has a Jupiter-like planet that orbits every three years .

这颗恒星还有一颗类土星行星，每 3 年绕公转轨道来一圈。

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