Model Forum / Radio Controlled / Air Models / April 2010

Or maybe there's a writer for Jeopardy who reads
r.m.rc.air!  :-O

The term may have become popular through the technique
of identifying the existence of planets (very large
and uninhabitable planets!) by the wobble they introduce
in the motion of the sun that they orbit.  Both the
sun and the planet are orbiting around the center of mass
of the two-body system (the barycenter) rather than the
sun's own center of mass.

                Marty