I have been to the Starburst or Sun, nr Avebury this morning. The formation is still in pristine condition, the centre swirls clockwise, the outer ring anticlockwise, all the stems that I examined, still had the dusty bloom covering from tip to top, remarkably undisturbed.
The foties I have attached are:~ one of a large ray, one of a medium ray, one of a small ray,
then the centre piece, (which is again sort of doubled over and woven, similar to The Ridgeway,)
Finally the large beautifully laid inner circle. The different sized rays remind me of:~
 

The Sun, giver of life, warmth, growth, all that is good. Similar styles are seen throughout the South Western Indian cultures. May or may not also show "rays" signifying the four directions  
 
The Zia, named for Zia Pueblo, who first used it,
this is another symbol of the sun,
and also of the four directions
and the circle of life on earth.
It also may be connected with the place of emergence, the sipapu, in stories.
 
JIC Jane (Rainbows)