[time-nuts] Determination of the placement of the first pps

[Jim Lux]

On 1/23/12 5:50 PM, J. L. Trantham wrote:
> Is this, in any way, related to the fact the Earth has a Moon?
>
> Ideally, the Earth rotates around the Sun and the Moon rotates around the
> Earth.  However, is it better described as the 'center of mass' of the
> Earth/Moon

barycenter is the term

  rotates around the Sun?  Not to mention all those other
> confounding variables such as other planets and moons?

Well, yes.. there are fairly sophisticated numerical integration 
programs that figure all this stuff out, if you're interested.

>