Hello everyone.
I have the following questions regarding double star system

1. Is it possible that both the star revolve in a common
circular orbit. If no then why?

2. When the required data is known how does one calculate the
velocities with which each star will move? Please show the required
calculations.

3. Exactly which laws of physics govern the motion of double star
system. And how are they applied?

4. I read that the stars have their centre of mass as one of
their focus. Can u please explain me the reason behind it.

5. How is the conservation of energy and momentum principle
followed here?

6. Is it possible that just as we have two star mutually
revolving, similarly we have 3,4,5 etc stars revolving around each
other?

I would be obliged if anyone could answer these questions.

Thank you

With regards,
astro_vedant