How is center of mass in a complex systems?

[jojo1st]

Now i am suddenly confused with the concept of the center of mass.
As we know , nucleus are a system of many-body,composed of nucleons. And their interactions are very complex between nucleons. I want to know, If we can observe a nuclei such as Ne20, how is the motivation of its center of mass?

 

[Polyrhythmic]

What do you mean by motivation?

 

[jojo1st]

Sorry , I mean motion.

 

[mathman]

The position of the center of mass is not affected by the internal motion of the nucleons.