First, I drew the spoked circle by using the elliptical marquee tool and stroke. I made a copy of the circle and reduced it to 65%. Using warp, copy and clone, I made a large piece from the source. I used distort to make it skinny and warp to curve it. After I merged the spokes, I used the elliptical marquee tool to make a dot.

To create depth, I used Layer > Layer Style > Bevel and Emboss

Distort, smudge and warp. For shadowing on all the zodiac signs, I used Layer > New Adjustment Layer > Brightness/Contrast. I held down Ctrl and pressed I to cause the adjustment layer to inverse, then painted the shadows. Another adjustment layer, only brighter, Ctrl I, and I painted in the highlights.

I made the zodiac symbols using warp. The dark circle was made by creating a circle of gravel, copy and reduce by 65%, copy reduce, copy reduce. I thought it was too bright and the symbols got lost in it, so I used Ctrl I just to see what would happen. I liked the results. I used Image > Adjustments > Brightness/Contrast to darken the color I had been using for my foreground. The border was another happy accident. I enlarged the canvas using Image > Canvas Size and that color just happened to be the background color of the Foreground/Background colors on the lower left side.

I finished it off by using the stars brush. What you see here is all the parts of the source image that I used.