Caption: The Sun (symbol ☉) dominates the Solar System motions.

Note, the Sun's mass (solar mass M_☉ = 1.98855*10**30 kg) is 99.86 % of the Solar System's mass (Wikipedia: Solar System). So the Sun dominates both the inertia and gravitational field of the Solar System, and thus dominates the Solar System motions.

Credit/Permission: © David Jeffery, 2003 / Own work.
Image link: Itself.
Local file: local link: sun_dominator.html.
File: Sun file: sun_dominator.html.