planetary

Within our own galaxy there are probably tens of thousands of planetary systems.

在我们所在的银河系中，很可能存在数以万计的行星系。

But they never altered their incorrect mental models of planetary motion because their everyday observations didn't support what their teachers told them.

但是他们从来没有改变他们关于行星运动的错误的心智模型，因为他们每天的观察所得并不支持他们的老师所教授的内容。

She is worried about planetary air pollution and climatic change.

她对于地球的空气污染与气候变化问题非常忧虑。