Spiral Galaxies

Spiral galaxies is a region based logic puzzle where the grid is divided up into smaller regions.

Rules
The objective is to divide the whole grid into smaller regions, "galaxies", subject to the following rules:
 * 1) The grid is divided up into regions along the grid lines.
 * 2) Each region must have rotational symmetry and must contain exactly one circle, which is at the centre of its rotational symmertry.

Example
A standard 10x10  spiral galaxies  and its solution.