Circles in Circle by Wassily Kandinsky
Enthusiastic Artist: Sphere look zendalas ~ Margaret has a PDF available, showing you how to get this 2D effect.
Paperweights - Comes from the Jane Sauer Gallery in Santa Fe.
Octonaut thigh tattoo piece, love it. The ocean is like a universe, and gravity is less compelling in both those spheres.
Abstract_ankle_tattoo by Gene Coffey, via Flickr
Reference for: alchemical globe in Central Plaza (arc 3 chap 9). Armillary (celestial) sphere, illustration. Source unknown.
round objects to pop out of the board? Started out by drawing them small and then they get bigger as they burst from the board