The planets themselves were not that tricky - a small peyote beaded bead plus the ring made with square stitch. The problem was the dangling part - it should have been a 3-dimensional, longish object, but I couldn't bead something similar, so at the end simply added big glass beads.
Then I decided to make a matching necklace too - but somehow I was convinced that the pendant on her choker is an eight-pointed star (similar to her brooch), so I made it that way. Only after finishing it came to my mind to check some reference pictures... Well, in the new anime it has indeed eight rays (but longer ones), while in the original anime only six, so my version is rather a mixture of the two...