If explore for the earth with long time scale, the earth changes may emerge from solar system, and the earth catastrophisms may emerge from GalacticSystem.
从长时间尺度看，在地球绕太阳运动过程中会涌现出全球变化特性；
2
Does the passage of Planet X usually coincide with the passage of our solar system through the galactic center?
是否行星x过境通常与我们的太阳系通过银河系的中心同时发生呢？
3
This has to do with our Solar system that is almost at the Galactic Equator.