[Elsie]

A system in which the center of rotation is the Sun.

Is the SUN rotating around something??

[Dominic Harr]

Is the SUN rotating around something??

Evidence suggests so, yes.

Using the same dynamic of gravity, the Sun is rotating around the galactic center, which some evidence suggests is a giant black hole.

And the Milky Way is rotating around a galactic center, also, if I remember correctl.